diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-1.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-1.json
index 67c8750118c45a879885e94ff748dcadb64bc418..2e5782964bf040b3e76a15f33d3b37b2fa46e606 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-1.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-1.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-10.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-10.json
index d0ccda64ca0df71e46b0eca1f0039d2891f8d0cd..cbd669583fc6efe16441b64e9dfd782608c8e27b 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-10.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-10.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-2.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-2.json
index d8f31c898b19f55a878e80f8eae50002e41f182f..266b74ce348ee231a94e5b91cc47924a5adb1cdf 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-2.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-2.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-3.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-3.json
index f75d6ec186387d1c006b728f09cdda695dd13f89..7b2978480769c8c036c25a1ac966997300d05b78 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-3.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-3.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-4.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-4.json
index 577fc1d09a6682c21aeb0921ebb803ab926c4419..7763ac01dcc20b612b51bc1e5320fb29c6032ea5 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-4.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-4.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-5.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-5.json
index 3acbdf904688ec6893be206bbbc03fcd4b6dc4a5..44aee644657684de3e6288dea55dafb735a35727 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-5.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-5.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-6.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-6.json
index 492785a4008d34402cfc7a10ee605a860acf8c66..cbf6fb6c232385a049f9ec32af699232127a75dc 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-6.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-6.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-7.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-7.json
index f780bb8c9cc8aedb101abbaa22188ce815369c2c..eb1a68ac4f4d391947a6938c8ef346380b83264c 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-7.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-7.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-8.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-8.json
index 2f09198e69ab0805dd5093b0c3d633c841b61276..df9bbbdb466eb6cdde0a5ad1f01e3fa41752f977 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-8.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-8.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-9.json b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-9.json
index 4442f8c95f199e0723a0cc5bc1ee52fe0f2e938a..75f29b2e1df56a3316a0e862d6aa2dc6d931aa6c 100644
--- a/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-9.json
+++ b/data/grid5000/sites/grenoble/clusters/adonis/nodes/adonis-9.json
@@ -90,10 +90,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7139000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-1.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-1.json
index d41a3778b58353e7268d4f3e8f2e375ac3d6a9e8..0bd3c0cdf82e90073dd7b3b264c999abab0fc82b 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-1.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-1.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-10.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-10.json
index 437771087ca7bdd7f71a1593ab95629d8b3fe72d..ddcdc95a1a8603438b8b432d796c1583cb088050 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-10.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-10.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-11.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-11.json
index 563367923859b374ce9c031a4cf31ea8c9338924..eb58ea90052f9ebe26647d7d7d44004cc56b7a27 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-11.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-11.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-12.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-12.json
index dc6a7167dcf5f5357f364f20c3b7bb6aadd7ea90..6f2d2758b573521491c699dfe44c9ab4fa6461a2 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-12.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-12.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-13.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-13.json
index 349656f728577d27829a196e5c7e7226b267bbd2..7f54d0ba39fec51f9b322f8749ec3c523cac1938 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-13.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-13.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-14.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-14.json
index 2a544189db77ef504e4bb5ca37e05b96c28a7369..29d9c4202bdab9c85562be2f8497d82b4555ae6e 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-14.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-14.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-15.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-15.json
index 1f149cac7b593cbc36f01787c1b25a330bf90f68..728d377991ec716dbe2110304d7dbbc887b8a04d 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-15.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-15.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-16.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-16.json
index f4e34a3178415c5438e224f0bf43ed9634b6c324..32e92cc6b13c63e610381ca2cede0d76f6751c2f 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-16.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-16.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-17.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-17.json
index d14d2a0e38e7759d7be8960248a5abc38d2f2379..c4b8f9198f7a762006af3d4eb8f574f0229da437 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-17.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-17.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-18.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-18.json
index ead61896b680a32eb679a8a61372eed1708e076a..7d3930e8b403821a91673a7863d20578b16a4b83 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-18.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-18.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-19.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-19.json
index b07d8607fcdff5dfaac1c553bdf823656bc69005..2247d20e5ad171f720050a7e12e3ef096599d3cc 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-19.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-19.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-2.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-2.json
index 23e13b335f09dc7ab15f32b87662deb0bf31e920..2aa2bfb677d946c7624d460f54c94ea4a2d57f8d 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-2.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-2.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-20.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-20.json
index e5ce22f8a59780c4b120869ce42cb8acff65cd65..274b97da4162706cdf29498543b9d5b166fff92e 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-20.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-20.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-21.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-21.json
index 5da85408174cfcc7886fddf62bbd2191db82bf34..329716c5716248e2d9435ed47e61f099120c7805 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-21.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-21.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-22.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-22.json
index d06c1103afc858af484eb8103c135488440c840d..d9c76d630c76a9cee5b3d45665b75ca085b07644 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-22.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-22.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-23.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-23.json
index ae0f27a955e9f1c1923bc29d353f0b3a7d77fc21..6bd63036f750db18459419e5388edf32687d3bb2 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-23.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-23.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-24.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-24.json
index ec51e302e59f59bc98b66c16a40ac99a872cc083..8afa4c349abdbd9d7e7f7a47ac708a69d6fbdbad 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-24.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-24.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-25.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-25.json
index 5873d0ad319c69f1f83eea8e4205a29f12711df2..e4537bcad239ed87a3c75ad4e02acea26d3a1b89 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-25.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-25.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-26.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-26.json
index f6f36c31d35eba98d6cb8bc11c2be453edab1801..779d7fbbb418402fc5a2a78d0a119de1bd58693f 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-26.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-26.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-27.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-27.json
index 2651b63bd8afa1481acf8a7efd90d7f8552e925d..1c9231923b714ca92279812c35e793df613eb8f0 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-27.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-27.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-28.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-28.json
index 64c0bc8a5db1ed1d7ac0d3b9d533d50bed79694e..2df3d288a8bc163e8ee12e24efc781d3b5fc0d9d 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-28.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-28.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-29.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-29.json
index 18840bdf91e58f7efc3d4dc936c121f78be85744..bd76331b60bcab9547707b90f135e90442c63eb5 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-29.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-29.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-3.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-3.json
index fd10b694174ba5a2026b9dd493322995441cc622..90968eb19ae9883d1f6107bb452c53481eae6eb2 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-3.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-3.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-30.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-30.json
index d6782a0a908adbc432a15eb445090b11432dedff..f61a9812a70d41e27a52d4f895cd48b47513e59a 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-30.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-30.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-31.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-31.json
index 86d220f1cc0687f5fe6e2d016e0093bfd03b048c..c5caf6cea6ea74476804bb87a9edccec54ebd483 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-31.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-31.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-32.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-32.json
index f97efcb7eb6b96190880bc1386d301b1141b1528..96eea8bfbe7a6ddca2cec1949ef2f31ffd7c5f13 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-32.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-32.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-33.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-33.json
index 6b7c64a8d1c512c4fc3ca407707dce0c984e5cd0..57b49b9189d569020615c1d2309e37cf85877f42 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-33.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-33.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-34.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-34.json
index a3888841c99f5ff0ff4d43ed09f9a5ce60e06e75..ce80fe39a555752ff84df02eeb5fc3c119bb39f3 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-34.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-34.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-35.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-35.json
index 978083a44b9b4a549bbac9c23f5d00d8354a01eb..c4e5e02a04f8a928f9807d635a3f3528805bd553 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-35.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-35.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-36.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-36.json
index a629d5f53c4f0bb45f29995bfe98303f75b26500..6b4bf01dcbcc035d946cd3792648880b6383b9c7 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-36.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-36.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-37.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-37.json
index 28bbc5dbacff06ffef6ba56e38aa08b781383886..6cec4e1202295a9c7fea9362f0a151728ce8d56f 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-37.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-37.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-38.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-38.json
index 811a0262141764f5720b09529f04dbd8b7d07368..6e341fb084717febc598a1f4eb968bcc4d3411d5 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-38.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-38.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-39.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-39.json
index 0445839b5b455936512ac619d12bdd3ca160ea49..320552887f236bbbe2bc4b7211a097e1cee9a56d 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-39.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-39.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-4.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-4.json
index 95c8c6959c56596baa3d3bc62ca5c40911a72855..cd0071d499ee5abf9187b1214f915b7859642973 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-4.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-4.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-40.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-40.json
index f5de86cf79ec93e8e42b607bc34f55dee88351eb..651a59b8c7129a6f80ac4b4e29ace64e03e1c36f 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-40.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-40.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-41.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-41.json
index 30d9cc03cebc35d91a6e5d51a4642d48f7068d03..0c8d43454638d9bf33434f62d2a7dbd1fcd748c3 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-41.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-41.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-42.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-42.json
index 7f53b902a5ed02fff4786df30587ab9d5c5feb70..94ad3448e39f24cd69836632929a50d719becc03 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-42.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-42.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-43.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-43.json
index 7abdf5e58e980da123fcdfdc29dd2c3eed4e6d6e..667a3a306821f71ab5efa164d403231010151661 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-43.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-43.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-44.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-44.json
index 0fe90453e389e8f771f766e4cc99c9890eb2569a..0872f3cb229ae7c14ac9b09503129082a9458f66 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-44.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-44.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-45.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-45.json
index 8c2b41917e03e6f2231bb9c7cb2cff5c9cbe49b8..4083b71b0ecc4933953ecec87c2bcb0d7263efb8 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-45.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-45.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-46.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-46.json
index df591ca6ade60bf7ef3bfdeea40dab6aa3899522..f5cb39324f2f64af127b130d221bca725389a6f9 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-46.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-46.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-47.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-47.json
index c2d855ec6a49af119a5857b234f3467f7155d9f5..14c3fb32ad4fa1bc33034f18f4dba7bbadfcf265 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-47.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-47.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-48.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-48.json
index 5ddf221888c706ac4c3147730d2d6f943fb5691a..a3e172afae0cad199c14bdccc2304e7170d27516 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-48.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-48.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-49.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-49.json
index 892306ab0ebc352d58ecc0bd932f2e95f2fe6870..91e1b0f0e2857ed24c5481cb8931bcc20ce28776 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-49.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-49.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-5.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-5.json
index a4356ee5db3b0549da5cec8d0957c02be8f2b89f..0b81645e9448640bd741c87204805aa7f9b84665 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-5.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-5.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-50.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-50.json
index 07174a511b1d7e61636d58931124fbc3b4fe5205..7a015b06d6fc2f77f94a7a9b6999042af02a28bd 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-50.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-50.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-51.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-51.json
index e85b43142c5ab070cfec89bcdc658d91cc06e787..2a6573e070e6e9c171ece01d7407e3eedc5fae8b 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-51.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-51.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-52.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-52.json
index 1eb4aa36b7c59c4a21b04ea1c28884d0b9b8faec..b3af1660f77b804867da49cc75691c1f50d52a7c 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-52.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-52.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-53.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-53.json
index 8fba9feab1c6bc6851b7b0fa258ce36b6d766268..3aab47ba4374e8c493de9a9bef37cfeeea67cac1 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-53.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-53.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-54.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-54.json
index 5003478af6d4a46f0130383ce53588a06eeeb164..402ab1f3ee19594db48392c15061aa484b0f1824 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-54.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-54.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-55.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-55.json
index f30fac57a1b060d4aa5841f11918efc5c6617a7d..5ac4b4276a1f773756664903ede0dbf39a36fd3c 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-55.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-55.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-56.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-56.json
index e625cb3ccd8a6d43f7aae7588c13f645ab306c72..552dd54671aa8aa255901aea2869086368b0e605 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-56.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-56.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-57.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-57.json
index f1892967e53b47f67f32f9aee5a80a42e00acbcc..d8e0a77a371bd519bb816fde04fbb0f7a4ce0fdd 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-57.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-57.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-58.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-58.json
index e8a56db95f15135d5c4495f6c9394b9c8d87b8c1..be43fce4dfe5fb032f246703c5178336f8099064 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-58.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-58.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-59.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-59.json
index 5904be0185f8a5cd40f6c662debff58ca5935d12..8e943751a988f311920e260e0c17c592ba2db3aa 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-59.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-59.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-6.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-6.json
index 665745782d28b8a7281ca0482399417af779000e..a6c19a3e26d6928406fdc5b7b41694fd94f5f60e 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-6.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-6.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-60.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-60.json
index 44e352f477219b87e2dfb7e965d7930a3a225afa..cc53bf3b70fb7c01265d2519f9d4fdf9af8f1361 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-60.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-60.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-61.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-61.json
index 090faa3a29c76ce235caa6ab84a8d56b03fa82b9..b45a3c6b850969346599dc04735ee134f59a9432 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-61.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-61.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-62.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-62.json
index da4fa90839d2fc4050c67e99f261bc79e0fa0286..00103cbe7d61b01c2207747466cc2320f54c8f10 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-62.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-62.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-63.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-63.json
index 4a78c402afd0a924c37f907e546d231e63eccc23..bd10d461e2e6b889ee347a7c636dd30700c52988 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-63.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-63.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-64.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-64.json
index a0bcd5053ae8f4daec05c2bf46e6c8782f915e9e..8b9125c550b68a0da3d24ef17364f76960d1c2a7 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-64.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-64.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-65.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-65.json
index 90eadc877e8933ed27967d5f36aab66485b3fe54..3bc95768aaf2dd20aba2c2eb47643e824c6bddbc 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-65.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-65.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-66.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-66.json
index 6b5310fda0b9e4a886f303d5f99f4e01083cef6b..cda7eede612a69658fe7c4dca321540303e65fbb 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-66.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-66.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-67.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-67.json
index 446f4e53e0cbe7510326b908602739123b30ed88..70c348195695b2fc3557e9f2c1ad0cb2a237a2c3 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-67.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-67.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-68.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-68.json
index a32020d40469516cbc631675f237a5fa80a15c08..c33639248510cc325a89be5d584c8f5925ac4057 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-68.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-68.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-69.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-69.json
index 0f31659883a1b75aa49c3cdea569fe6ab994bfa7..04a61b4964d8e4668c41212ab7f7d38178f1e980 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-69.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-69.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-7.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-7.json
index 139d8944ff84740264c3d99fe8f4c9e0c63cb5f3..0b64bbfa16821db9928a2a4fabe0a9d294d3d9be 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-7.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-7.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-70.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-70.json
index b2eb9487384fa300b6860932be29d03e24993712..0ef4af0dae65fc692d78db09a04de52587f36ea0 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-70.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-70.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-71.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-71.json
index 8d983708218c89194edfa54e2cfb6e5723df24cf..c67d6b76100a95cca22935116a5bb12d29002b2f 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-71.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-71.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-72.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-72.json
index 89c2ae8c0e21847a0ae52d15bf2262c105b1fd5b..c151a6a8ef513cd0a0bcd6b6c5c4160e26e93e7e 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-72.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-72.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-8.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-8.json
index ba0619f073c60b97fa315ad96a845cee8fc57c69..437840f4e7b106c2b5ba129f08771de88158bff4 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-8.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-8.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-9.json b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-9.json
index 02937573ff5682b9ac0696458aac8e76de6fdd3d..9267520321f6bc692ac6cbc5b709c83b85cd987b 100644
--- a/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-9.json
+++ b/data/grid5000/sites/grenoble/clusters/edel/nodes/edel-9.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": null,
-    "name": null,
-    "release": "Squeeze",
-    "version": null
+    "kernel": "3.2.0-4-amd64",
+    "name": "debian",
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 71394000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-1.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-1.json
index 9ef30de583b48dc7121abf7b724867d092b7159d..ba7bff99f7d7122a4ff95a16307e1c94d407012f 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-1.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-1.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-10.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-10.json
index e44e9a1419ccb9d48200c69e7eff9d767a488f56..d55ed2af6c9d22429bf2982a1cb1be4ca5c2a80a 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-10.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-10.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-11.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-11.json
index 18b583135ca0336023f3e0d2d009abec4a090bd7..d957eb03a3f2aede69fe1011cfda11acc93b22b8 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-11.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-11.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-12.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-12.json
index 597a28d3b07d306c96b85c7afddf637790b40132..798d43eec23ccbd21d03fc2f5afab3eafcfc0dfd 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-12.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-12.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-13.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-13.json
index 1ba0d1466506bf38625fd2427cada45154bc0e6b..cfab109ad9198a26c4e0b5e128da05c8fcc9f075 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-13.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-13.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-14.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-14.json
index d4e994290b1005770346c4da0b2aec72da45a05b..44cfcf9baf52d4b0eb60ed2f6d584fd71616a9d2 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-14.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-14.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-15.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-15.json
index 457a5337a65f5cc00b956e0dbb557ef0b9e07602..797fab207a2ef387cca275c527ceea773c81a700 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-15.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-15.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-16.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-16.json
index 7ad252708f182103a742f55a2c3cf7152ba1d665..b546cbec5eeef4b31013666d8020957101d4e637 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-16.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-16.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-17.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-17.json
index 5f32a721dbbf30ed355f5ad2988daa0718c1d8e3..f0faa387920a8bc3f9e0d37eebd70637f10d8957 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-17.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-17.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-18.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-18.json
index 1b9fa218761a098840439e1e435559558cdca943..5c0f5f689f161d98e1192fc7928bf9baa169f616 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-18.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-18.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-19.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-19.json
index 5496ce49cf4c761073df2975e5fe29b1b10ee3bd..c856a8d40a8f4001ddafa6980e6cfdf4db66e54d 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-19.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-19.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-2.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-2.json
index 7cebfb8be765efb80ae122f3fc16ce6ac532326d..e14245c8020068d9e9194002bfbc26cec4c608c6 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-2.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-2.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-20.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-20.json
index 192cdb22bdb911c1508795db1ec0044593f698c2..3278eb0b83154ff7fa75b35ea1d7e79ad6a5fb99 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-20.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-20.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-21.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-21.json
index 910592a6d116f4cb5707249d72ac1989872bd9e5..b411599ba5508ee17782838ed27182bb31e73abe 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-21.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-21.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-22.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-22.json
index d7a7895a224c189e0155e1be53fc68a519de454f..8c4c08725d1d37263122ec57e9b71675bf526c37 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-22.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-22.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-23.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-23.json
index d9c477598b76e4e2dfd871a639cf98991caea491..2a845498ee68c3edb3f2383320a9d72522631c3a 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-23.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-23.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-24.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-24.json
index 66483c6a07c43d00c7cd6479c5abb36f46ef6729..8e04c47c570bea48fce6abc33f1f05abcc3ca531 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-24.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-24.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-25.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-25.json
index 4e0a171cdf5e8dc1b95c7deb2813df6817c7b254..087198cf960058aa866541eaf571c17e6c0e4448 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-25.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-25.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-26.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-26.json
index 8d01208f29898f14e34bd71d43e8d06700a6d149..a53c4d67fb72bf0f6900af4eb34ac0db45ce7e34 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-26.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-26.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-27.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-27.json
index 0d700e42c3511a70ba76adb07d42424cf483a7ac..d1a32f3cca4f3e952f7b2d760ee7c047f41fd5dc 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-27.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-27.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-28.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-28.json
index e7fdf353bc64123b6d34aba6ed81cc79f32807a3..093d6a2d276f0a985bb3f73c96baa7105e4313d8 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-28.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-28.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-29.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-29.json
index 0ae0613a8de22f1ae2103b02fb3454e87d97c701..556f9c94c7c5139f1b5d2482363f50ff02b803f9 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-29.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-29.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-3.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-3.json
index 4dc2a1c0894a0f25306e3c69e64292f6f099e2cc..445f177738e214bde76e7db170b9ffbd7fba835e 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-3.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-3.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-30.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-30.json
index a5f46d9514b4530a31782a59e2faa081b29886c3..c63b8b5fa0ceba2a27383585f79b5a883b053e2d 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-30.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-30.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-31.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-31.json
index 91ccb42af6e88c747e6a31f59572bc28d79e23fc..cba400e8189fed6e2acff7044ea53a4b487a3868 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-31.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-31.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-32.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-32.json
index 40867b1077634aab778dadda300c7d2dd0b4d29b..5a8327432d3f1f5e5d317ab640090363d800b381 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-32.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-32.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-33.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-33.json
index 6f2f50203a081b4298c07a09580fd5941013ba3a..c11ff173690dbf5aede9aef0af076a6d1da2e35e 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-33.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-33.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-34.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-34.json
index fae60216b8cade5d4055c3563fef0d62a27118d1..4191937aca3b58c67e15b6afbe783e8f427bf4ab 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-34.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-34.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-4.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-4.json
index c16212f48192398278f6212d5c52b0f7379a47b3..d56698c227e2a6e773ad183bdb22758c93a513ef 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-4.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-4.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-5.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-5.json
index 9d124fd007dd2b5bbd35c5a1968ce8287fbab978..19bcfd02122d6847ce6db9f58a5f6d996116c509 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-5.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-5.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-6.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-6.json
index 099cfae127f7ef29940cc00b4248aa13f63404a4..efb32e242ecf79dd4e3421a97724d81dac6ed9bf 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-6.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-6.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-7.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-7.json
index 7193e3cc4208b14f852aeb32d96fed225f42d7cd..54eb5bc2e0e2be25a7e106857f92c7bf7c7bd232 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-7.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-7.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-8.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-8.json
index 61fe24b088f1b9475859f7a7334704ba9c79bb4a..e8e6cfb8bf5cc0f68ffb86b9c3a7295f5dfaf51e 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-8.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-8.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-9.json b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-9.json
index 3f83d28211aa599c73875d25b56e257fb0d3cd8b..eb8e92108a21816e905f7a86a283430b138e3cd6 100755
--- a/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-9.json
+++ b/data/grid5000/sites/grenoble/clusters/genepi/nodes/genepi-9.json
@@ -103,10 +103,10 @@
     }
   ],
   "operating_system": {
-    "kernel": "2.6.32-5-amd64",
+    "kernel": "3.2.0-4-amd64",
     "name": "debian",
-    "release": "Squeeze",
-    "version": "6.0.6"
+    "release": "Wheezy",
+    "version": "7"
   },
   "performance": {
     "core_flops": 7651000000,
diff --git a/generators/input/sites/grenoble/clusters/adonis.rb b/generators/input/sites/grenoble/clusters/adonis.rb
index 0bf50ee2dd6026358a81213c8b01b2d7bc2308f5..675c2f9d429d4c79dde00c7daae4101e86346112 100644
--- a/generators/input/sites/grenoble/clusters/adonis.rb
+++ b/generators/input/sites/grenoble/clusters/adonis.rb
@@ -46,10 +46,10 @@ site :grenoble do |site_uid|
         })
 
         operating_system({
-          :name     => lookup('adonis_generated', node_uid, 'operating_system', 'name'),
-          :release  => "Squeeze",
-          :version  => lookup('adonis_generated', node_uid, 'operating_system', 'version'),
-          :kernel   => lookup('adonis_generated', node_uid, 'operating_system', 'kernel')
+          :name     => "debian",
+          :release  => "Wheezy",
+          :version  => "7",
+          :kernel   => "3.2.0-4-amd64"
         })
 
         storage_devices [{
diff --git a/generators/input/sites/grenoble/clusters/edel.rb b/generators/input/sites/grenoble/clusters/edel.rb
index 673c330d7c894dc3a0b195d92b4c855bcbccdfa0..9d1b4f310c703b4ec6620e09ca687402b1fc5856 100644
--- a/generators/input/sites/grenoble/clusters/edel.rb
+++ b/generators/input/sites/grenoble/clusters/edel.rb
@@ -46,10 +46,10 @@ site :grenoble do |site_uid|
         })
 
         operating_system({
-          :name     => lookup('edel_generated', node_uid, 'operating_system', 'name'),
-          :release  => "Squeeze",
-          :version  => lookup('edel_generated', node_uid, 'operating_system', 'version'),
-          :kernel   => lookup('edel_generated', node_uid, 'operating_system', 'kernel')
+          :name     => "debian",
+          :release  => "Wheezy",
+          :version  => "7",
+          :kernel   => "3.2.0-4-amd64"
         })
 
         storage_devices [{
diff --git a/generators/input/sites/grenoble/clusters/genepi.rb b/generators/input/sites/grenoble/clusters/genepi.rb
index 2e42e57f552a955bab428426c1dee4dc372d532b..b131150dfcc698457814e1207c2ef870a1b218f4 100644
--- a/generators/input/sites/grenoble/clusters/genepi.rb
+++ b/generators/input/sites/grenoble/clusters/genepi.rb
@@ -10,9 +10,9 @@ site :grenoble do |site_uid|
       node "#{cluster_uid}-#{i+1}" do |node_uid|
 
         performance({
-        :core_flops => 7651000000,
-        :node_flops => 49650000000
-      })
+          :core_flops => 7651000000,
+          :node_flops => 49650000000
+        })
 
         supported_job_types({
           :deploy       => true,
@@ -46,10 +46,10 @@ site :grenoble do |site_uid|
         })
 
         operating_system({
-          :name     => lookup('genepi_generated', node_uid, 'operating_system', 'name'),
-          :release  => "Squeeze",
-          :version  => lookup('genepi_generated', node_uid, 'operating_system', 'version'),
-          :kernel   => lookup('genepi_generated', node_uid, 'operating_system', 'kernel')
+          :name     => "debian",
+          :release  => "Wheezy",
+          :version  => "7",
+          :kernel   => "3.2.0-4-amd64"
         })
 
         storage_devices [{