diff --git a/generators/input/bordeaux.rb b/generators/input/bordeaux.rb
index 7f18447b58e5dfb1590fd35dec671b723dfb5f8f..0f03f86eaaaf97c8c798de5fe98b50d5117bad35 100755
--- a/generators/input/bordeaux.rb
+++ b/generators/input/bordeaux.rb
@@ -3,8 +3,8 @@ site :bordeaux do |site_uid|
   location "Bordeaux, France"
   web "http://www.grid5000.fr/mediawiki/index.php/Bordeaux:Home"
   description "Grid5000 Bordeaux site"
-  latitude "44° 50’ 18’’ Nord"
-  longitude "Nord 0° 34’ 41’’ Ouest"
+  latitude 44.833333
+  longitude -0.566667
   email_contact "bordeaux-staff@lists.grid5000.fr"
   sys_admin_contact "bordeaux-staff@lists.grid5000.fr"
   security_contact "bordeaux-staff@lists.grid5000.fr"
@@ -30,16 +30,16 @@ version 1.48"
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "248",
-          :clock_speed => 2.2.giga,
+          :clock_speed => 2.2.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
-          :cache_l1i => "64K",
-          :cache_l1d => "64K",
-          :cache_l2 => 1.MB
+          :cache_l1i => 64.KiB,
+          :cache_l1d => 64.KiB,
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 2.GB(true), # bytes
+          :ram_size => 2.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -48,14 +48,14 @@ version 1.48"
           :version => nil
         })
         storage_devices [
-          {:interface => 'IDE', :size => 80.GB(false), :driver => "amd74xx"}
+          {:interface => 'IDE', :size => 80.GB, :driver => "amd74xx"}
           ]
         network_adapters [
-          {:interface => 'Myri-2000', :rate => 2.giga, 
+          {:interface => 'Myri-2000', :rate => 2.G, 
             :switch => "sbdm", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :vendor => 'Myrinet', :version => "M3F-PCIXD-2", :enabled => true},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "tg3"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "tg3"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "tg3"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "tg3"}
           ]
       end
     end
@@ -77,16 +77,16 @@ version 1.48"
           :vendor => "Intel",
           :model => "Intel Xeon",
           :version => "EM64T",
-          :clock_speed => 3.giga,
+          :clock_speed => 3.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
-          :cache_l1d => "16K",
-          :cache_l2 => 1.MB
+          :cache_l1d => 16.KiB,
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 2.GB(true), # bytes
+          :ram_size => 2.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -95,14 +95,14 @@ version 1.48"
           :version => nil
         })
         storage_devices [
-          {:interface => 'SCSI', :size => 70.GB(false), :driver => "mptspi"}
+          {:interface => 'SCSI', :size => 70.GB, :driver => "mptspi"}
           ]
         network_adapters [
-          {:interface => 'InfiniBand', :rate => 10.giga, 
+          {:interface => 'InfiniBand', :rate => 10.G, 
             :switch => "sbdp", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :vendor => 'InfiniHost', :version => "MT25208", :enabled => true},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "e1000"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "e1000"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "e1000"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "e1000"}
           ]
       end
     end
@@ -124,16 +124,16 @@ version 1.48"
           :vendor => "AMD",
           :model => "Dual-Core AMD Opteron Processor",
           :version => "2218",
-          :clock_speed => 2.6.giga,
+          :clock_speed => 2.6.G,
           :instruction_set => "x86-64",
           :other_description => "",
           :cache_l1 => nil,
-          :cache_l1i => "64K",
-          :cache_l1d => "64K",
-          :cache_l2 => 1.MB
+          :cache_l1i => 64.KiB,
+          :cache_l1d => 64.KiB,
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 4.GB(true), # bytes
+          :ram_size => 4.GiB,
           :virtual_size => nil
         })
         operating_system({
@@ -142,13 +142,13 @@ version 1.48"
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 80.GB(false), :driver => "sata_svw", :vendor => "Hitachi", :version => "HDS72168"}
+          {:interface => 'SATA', :size => 80.GB, :driver => "sata_svw", :vendor => "Hitachi", :version => "HDS72168"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => nil, :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => "tg3", :vendor => "Broadcom", :version => "BCM5704"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "tg3", :vendor => "Broadcom", :version => "BCM5704"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "tg3", :vendor => "Broadcom", :version => "BCM5704"}
           ]
       end
     end
@@ -170,16 +170,16 @@ version 1.48"
           :vendor => "AMD",
           :model => "Dual-Core AMD Opteron Processor 8218",
           :version => "2218",
-          :clock_speed => 2.6.giga,
+          :clock_speed => 2.6.G,
           :instruction_set => "x86-64",
           :other_description => "",
           :cache_l1 => nil,
-          :cache_l1i => "64K",
-          :cache_l1d => "64K",
-          :cache_l2 => 2.MB
+          :cache_l1i => 64.KiB,
+          :cache_l1d => 64.KiB,
+          :cache_l2 => 2.MiB
 	})
         main_memory({
-          :ram_size => 32.GB(true), # bytes
+          :ram_size => 32.GiB,
           :virtual_size => nil
         })
         operating_system({
@@ -188,17 +188,17 @@ version 1.48"
           :version => "5.0"
         })
         storage_devices [
-          {:interface => 'SAS', :size => 600.GB(false), :driver => nil}
+          {:interface => 'SAS', :size => 600.GB, :driver => nil}
           ]
         network_adapters [
-          {:interface => 'Myri-10G', :rate => 10.giga, 
+          {:interface => 'Myri-10G', :rate => 10.G, 
             :switch => nil, :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :vendor => 'Myrinet', :version => "10G-PCIE-8A-C", :enabled => true},
-          {:interface => 'InfiniBand', :rate => 10.giga, :vendor => 'InfiniHost', :version => "MT25408", :enabled => true},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "e1000"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "e1000"}
+          {:interface => 'InfiniBand', :rate => 10.G, :vendor => 'InfiniHost', :version => "MT25408", :enabled => true},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "e1000"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "e1000"}
           ]
       end
     end
   end # cluster borderline
-end
\ No newline at end of file
+end
diff --git a/generators/input/environments.rb b/generators/input/environments.rb
index 37f12175b566b2fcacef217683867a5135e6f4cc..675ea1dc07746b5a571a3d781f18c8ce4e84498e 100755
--- a/generators/input/environments.rb
+++ b/generators/input/environments.rb
@@ -10,7 +10,7 @@ environment 'sid-x64-base-1.0' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'sid-x64-base-1.1' do
@@ -25,7 +25,7 @@ environment 'sid-x64-base-1.1' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'sid-x64-nfs-1.0' do
@@ -40,7 +40,7 @@ environment 'sid-x64-nfs-1.0' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'sid-x64-nfs-1.1' do
@@ -55,7 +55,7 @@ environment 'sid-x64-nfs-1.1' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'sid-x64-big-1.1' do
@@ -70,7 +70,7 @@ environment 'sid-x64-big-1.1' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'etch-x64-base-1.0' do
@@ -85,7 +85,7 @@ environment 'etch-x64-base-1.0' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'etch-x64-base-1.1' do
@@ -100,7 +100,7 @@ environment 'etch-x64-base-1.1' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'etch-x64-nfs-1.0' do
@@ -115,7 +115,7 @@ environment 'etch-x64-nfs-1.0' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'etch-x64-nfs-1.1' do
@@ -130,7 +130,7 @@ environment 'etch-x64-nfs-1.1' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'etch-x64-big-1.0' do
@@ -145,7 +145,7 @@ environment 'etch-x64-big-1.0' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'etch-x64-big-1.1' do
@@ -160,7 +160,7 @@ environment 'etch-x64-big-1.1' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'etch-x64-xen-1.0' do
@@ -175,7 +175,7 @@ environment 'etch-x64-xen-1.0' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'lenny-x64-base-0.9' do
@@ -190,7 +190,7 @@ environment 'lenny-x64-base-0.9' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'lenny-x64-base-1.0' do
@@ -205,7 +205,7 @@ environment 'lenny-x64-base-1.0' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'lenny-x64-nfs-0.9' do
@@ -220,7 +220,7 @@ environment 'lenny-x64-nfs-0.9' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
 
 environment 'lenny-x64-big-0.9' do
@@ -235,5 +235,5 @@ environment 'lenny-x64-big-0.9' do
   applications "Vim, XEmacs, JED, nano, JOE, Perl, Python, Ruby".split(", ")
   x11_forwarding true
   max_open_files 8192
-  tcp_bandwidth 1.giga
+  tcp_bandwidth 1.G
 end
\ No newline at end of file
diff --git a/generators/input/grenoble.rb b/generators/input/grenoble.rb
index eb379055199ff419031c7cd964eceec3572f4c07..083d2804588a21ef9327316aa9ea70ce3ecbb216 100755
--- a/generators/input/grenoble.rb
+++ b/generators/input/grenoble.rb
@@ -29,7 +29,7 @@ site :grenoble do |site_uid|
           :vendor => "Intel",
           :model => "Intel Xeon",
           :version => "E5420 QC",
-          :clock_speed => 2.5.giga,
+          :clock_speed => 2.5.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
@@ -38,7 +38,7 @@ site :grenoble do |site_uid|
           :cache_l2 => nil
         })
         main_memory({
-          :ram_size => 8.GB(true), # bytes
+          :ram_size => 8.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -47,12 +47,12 @@ site :grenoble do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 160.GB(false), :driver => nil}
+          {:interface => 'SATA', :size => 160.GB, :driver => nil}
           ]
         network_adapters [
-          {:interface => 'InfiniBand 10G', :rate => 10.giga, :enabled => true,
+          {:interface => 'InfiniBand 10G', :rate => 10.G, :enabled => true,
             :switch => nil, :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr")},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false}
           ]  
       end      
     end
diff --git a/generators/input/input.description.ignore b/generators/input/input.description.ignore
index 5312f1e53644cae75506ddc4b65eafce06bdd505..962c5041862890ab82ba875047f60705d9588548 100644
--- a/generators/input/input.description.ignore
+++ b/generators/input/input.description.ignore
@@ -29,7 +29,7 @@ site :rennes do |site_uid|      # General description of the site.
         # describes the architecture of the node
         architecture({
           :smp_size => 2, # number of physical CPUs
-          :smt_size => 4, # number of logical CPUs (cores)
+          :smt_size => 4, # total number of logical CPUs (cores)
           :platform_type => "x86_64"
           })
         # describes the processors
@@ -37,7 +37,7 @@ site :rennes do |site_uid|      # General description of the site.
           :vendor => "Intel",
           :model => "Intel Xeon",
           :version => "5148 LV",
-          :clock_speed => 2.33.giga,  # giga = 10^9
+          :clock_speed => 2.33.G,     # G = 10^9, M = 10^6, etc.
           :instruction_set => "",     # x86-64, IA-64, ...
           :other_description => "",   
           :cache_l1 => nil,           # first-level unified cache size of the processor
@@ -46,7 +46,7 @@ site :rennes do |site_uid|      # General description of the site.
           :cache_l2 => nil            # second-level unified cache size of the processor
         })
         main_memory({
-          :ram_size => 4.GB(true),    # the amount of RAM (indicating true means "true bytes" (multiple of 2^10))
+          :ram_size => 4.GiB,         # the amount of RAM. MAKE SURE YOU USE GiB or MiB or KiB, and not GB, MB, KB...
           :virtual_size => nil        # the amount of virtual memory (RAM+Swap)
         })
         # Information about the default operating system of the node 
@@ -62,21 +62,22 @@ site :rennes do |site_uid|      # General description of the site.
           :version => nil             # version of the operating system
         })
         # Describes the list of storage devices available on the node
+        # Notice the use of ***GB*** (and not GiB)
         # Required properties include: :interface, :size
         # You may add the :driver property, or a :raid property (e.g. :raid => "0") if needed.
         storage_devices [
-          {:interface => 'SATA', :size => 160.GB(false), :driver => "mptsas"}
+          {:interface => 'SATA', :size => 160.GB, :driver => "mptsas"}
           ]
         # Describes the list of network adapters available on the node
         # Required properties include: :interface, :rate, :switch, :network_address, :ip, :enabled
         # You may add properties such as: :driver, :vendor, :version
         # You may include adapters reserved for management (in this case, set enabled to false)
         network_adapters [
-            {:interface => 'Myri-10G', :rate => 10.giga, 
+            {:interface => 'Myri-10G', :rate => 10.G, 
               :switch => "c6509-grid", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"), 
               :vendor => 'Myrinet', :version => "10G-PCIE-8A-C", :enabled => true},
-            {:interface => 'Ethernet', :rate => 1.giga, :enabled => true},
-            {:interface => 'Ethernet', :rate => 1.giga, :enabled => false}
+            {:interface => 'Ethernet', :rate => 1.G, :enabled => true},
+            {:interface => 'Ethernet', :rate => 1.G, :enabled => false}
           ]        
       end
     end
diff --git a/generators/input/lille.rb b/generators/input/lille.rb
index df3befd46a92425ccda2e8b81fdfb0d002c9dbe2..22a43895bc60b66afac4d8ad99666dfdc5ca8f51 100755
--- a/generators/input/lille.rb
+++ b/generators/input/lille.rb
@@ -29,16 +29,16 @@ site :lille do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "248",
-          :clock_speed => 2.2.giga,
+          :clock_speed => 2.2.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 4.GB(true), # bytes
+          :ram_size => 4.GiB,
           :virtual_size => nil
         })
         operating_system({
@@ -47,10 +47,10 @@ site :lille do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 80.GB(false), :driver => "sata_sil"}
+          {:interface => 'SATA', :size => 80.GB, :driver => "sata_sil"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => "switch1", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => "tg3"}
           ]  
@@ -74,16 +74,16 @@ site :lille do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "252",
-          :clock_speed => 2.6.giga,
+          :clock_speed => 2.6.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 4.GB(true), # bytes
+          :ram_size => 4.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -92,10 +92,10 @@ site :lille do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 80.GB(false), :driver => "sata_svw"}
+          {:interface => 'SATA', :size => 80.GB, :driver => "sata_svw"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => "switch1", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => "tg3"}
           ]        
@@ -118,16 +118,16 @@ site :lille do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "285",
-          :clock_speed => 2.6.giga,
+          :clock_speed => 2.6.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 4.GB(true), # bytes
+          :ram_size => 4.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -136,10 +136,10 @@ site :lille do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 80.GB(false), :driver => "sata_svw"}
+          {:interface => 'SATA', :size => 80.GB, :driver => "sata_svw"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => "switch1", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => "tg3"}
           ]        
@@ -162,16 +162,16 @@ site :lille do |site_uid|
           :vendor => "Intel",
           :model => "Intel Xeon",
           :version => "E5440 QC",
-          :clock_speed => 2.83.giga,
+          :clock_speed => 2.83.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 4.MB
+          :cache_l2 => 4.MiB
         })
         main_memory({
-          :ram_size => 8.GB(true), # bytes
+          :ram_size => 8.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -180,10 +180,10 @@ site :lille do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA II', :size => 250.GB(false), :driver => "ahci"}
+          {:interface => 'SATA II', :size => 250.GB, :driver => "ahci"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => nil, :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => "e1000"}
           ]
diff --git a/generators/input/lyon.rb b/generators/input/lyon.rb
index fb3c785eebf1664a04047d068a90c943e8828910..96009ded6d035f73c3b4421cee44cc846b90a8e4 100755
--- a/generators/input/lyon.rb
+++ b/generators/input/lyon.rb
@@ -29,16 +29,16 @@ site :lyon do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "246",
-          :clock_speed => 2.giga,
+          :clock_speed => 2.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 2.GB(true), # bytes
+          :ram_size => 2.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -47,13 +47,13 @@ site :lyon do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'IDE', :size => 80.GB(false), :driver => "amd74xx"}
+          {:interface => 'IDE', :size => 80.GB, :driver => "amd74xx"}
           ]
         network_adapters [
-          {:interface => 'Myri-2000', :rate => 2.giga, 
+          {:interface => 'Myri-2000', :rate => 2.G, 
             :switch => "little-ego", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :vendor => 'Myrinet', :version => "M3F-PCIXF-2", :enabled => true},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "tg3"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "tg3"}
           ]        
       end
     end    
@@ -74,16 +74,16 @@ site :lyon do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "250",
-          :clock_speed => 2.4.giga,
+          :clock_speed => 2.4.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 2.GB(true), # bytes
+          :ram_size => 2.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -92,10 +92,10 @@ site :lyon do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SCSI', :size => 73.GB(false), :driver => "mptspi"}
+          {:interface => 'SCSI', :size => 73.GB, :driver => "mptspi"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => "little-ego", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => "tg3"}
           ]        
diff --git a/generators/input/nancy.rb b/generators/input/nancy.rb
index 1d5f30390774e25176d55a533257e96407b6bd4b..4f045090c294bbc1ba3d3ba368c545d9849a4fe0 100755
--- a/generators/input/nancy.rb
+++ b/generators/input/nancy.rb
@@ -28,16 +28,16 @@ site :nancy do |site_uid|
           :vendor => "Intel",
           :model => "Intel Xeon",
           :version => "5110",
-          :clock_speed => 1.6.giga,
+          :clock_speed => 1.6.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 4.MB
+          :cache_l2 => 4.MiB
         })
         main_memory({
-          :ram_size => 2.GB(true), # bytes
+          :ram_size => 2.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -46,13 +46,13 @@ site :nancy do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 80.GB(false), :driver => "ata_piix"}
+          {:interface => 'SATA', :size => 80.GB, :driver => "ata_piix"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => "sgrelon1", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => "tg3", :vendor => "Broadcom", :version => "BCM5721"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "tg3", :vendor => "Broadcom", :version => "BCM5721"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "tg3", :vendor => "Broadcom", :version => "BCM5721"}
           ]
       end
     end
@@ -73,16 +73,16 @@ site :nancy do |site_uid|
           :vendor => "Intel",
           :model => "Intel Xeon",
           :version => "L5420",
-          :clock_speed => 2.5.giga,
+          :clock_speed => 2.5.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 12.MB
+          :cache_l2 => 12.MiB
         })
         main_memory({
-          :ram_size => 16.GB(true), # bytes
+          :ram_size => 16.GiB,
           :virtual_size => nil
         })
         operating_system({
@@ -91,14 +91,14 @@ site :nancy do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA II', :size => 320.GB(false), :driver => "ata_piix"}
+          {:interface => 'SATA II', :size => 320.GB, :driver => "ata_piix"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => "sgriffon1", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => "e1000e", :vendor => "intel", :version => "80003ES2LAN"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "e1000e", :vendor => "intel", :version => "BCM5721"},
-	  {:interface => 'Infiniband 20G', :rate => 20.giga, :enabled => true,
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "e1000e", :vendor => "intel", :version => "BCM5721"},
+	  {:interface => 'Infiniband 20G', :rate => 20.G, :enabled => true,
 	    :switch => "ib_switch", :driver => "mlx4_core", :vendor => "Mellanox", :version => "MT26418" }
           ]
       end
diff --git a/generators/input/orsay.rb b/generators/input/orsay.rb
index dbc0a81949855bedf8ba77c528808d9373a805cb..75517bd6dda2ff0f80f9c27966d5b25489b31e58 100755
--- a/generators/input/orsay.rb
+++ b/generators/input/orsay.rb
@@ -29,16 +29,16 @@ site :orsay do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "246",
-          :clock_speed => 2.giga,
+          :clock_speed => 2.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 2.GB(true), # bytes
+          :ram_size => 2.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -47,16 +47,16 @@ site :orsay do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 80.GB(false), :driver => nil}
+          {:interface => 'SATA', :size => 80.GB, :driver => nil}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => nil, :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => nil},          
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true,
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true,
             :switch => nil, :network_address => "#{node_uid}-eth1.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}-eth1.#{site_uid}.grid5000.fr"),
             :driver => nil},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true,
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true,
             :switch => nil, :network_address => "#{node_uid}-eth2.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}-eth2.#{site_uid}.grid5000.fr"),
             :driver => nil}
           ]  
@@ -82,16 +82,16 @@ site :orsay do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "246",
-          :clock_speed => 2.giga,
+          :clock_speed => 2.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 2.GB(true), # bytes
+          :ram_size => 2.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -100,14 +100,14 @@ site :orsay do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 80.GB(false), :driver => nil}
+          {:interface => 'SATA', :size => 80.GB, :driver => nil}
           ]
         network_adapters [  
-          {:interface => 'Myri-10G', :rate => 10.giga, :enabled => true, 
+          {:interface => 'Myri-10G', :rate => 10.G, :enabled => true, 
             :switch => nil, :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :vendor => "Myrinet", :version => "10G-PCIE-8A-C"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false}
           ]
       end        
     end
@@ -117,7 +117,7 @@ site :orsay do |site_uid|
       node "#{cluster_uid}-#{182+i}" do
         processor({
           :version => "250",
-          :clock_speed => 2.4.giga
+          :clock_speed => 2.4.G
         })
       end
     end
diff --git a/generators/input/rennes.rb b/generators/input/rennes.rb
index 45a3742bf22f80cd1ba8e30bd8f4de00c6b87a06..5578efac9269f860a996555fc9e10f8ddeb1b3e6 100755
--- a/generators/input/rennes.rb
+++ b/generators/input/rennes.rb
@@ -30,7 +30,7 @@ site :rennes do |site_uid|
           :vendor => "Intel",
           :model => "Intel Xeon",
           :version => "5148 LV",
-          :clock_speed => 2.33.giga,
+          :clock_speed => 2.33.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
@@ -39,7 +39,7 @@ site :rennes do |site_uid|
           :cache_l2 => nil          
         })
         main_memory({
-          :ram_size => 8.GB(true), # bytes
+          :ram_size => 8.GiB,
           :virtual_size => nil
         })
         operating_system({
@@ -49,15 +49,15 @@ site :rennes do |site_uid|
           :kernel => "2.6.19.1"
         })
         storage_devices [
-          {:interface => 'SATA', :size => 300.GB(false), :driver => "megaraid_sas", :raid => "0"},
-          {:interface => 'SATA', :size => 300.GB(false), :driver => "megaraid_sas", :raid => "0"}
+          {:interface => 'SATA', :size => 300.GB, :driver => "megaraid_sas", :raid => "0"},
+          {:interface => 'SATA', :size => 300.GB, :driver => "megaraid_sas", :raid => "0"}
           ]
         network_adapters [
-          {:interface => 'Myri-10G', :rate => 10.giga, 
+          {:interface => 'Myri-10G', :rate => 10.G, 
             :switch => "c6509-grid", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"), 
             :vendor => 'Myrinet', :version => "10G-PCIE-8A-C", :enabled => true},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "bnx2"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "bnx2"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "bnx2"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "bnx2"}
           ]
       end
     end
@@ -79,7 +79,7 @@ site :rennes do |site_uid|
           :vendor => "Intel",
           :model => "Intel Xeon",
           :version => "5148 LV",
-          :clock_speed => 2.33.giga,
+          :clock_speed => 2.33.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
@@ -88,7 +88,7 @@ site :rennes do |site_uid|
           :cache_l2 => nil
         })
         main_memory({
-          :ram_size => 4.GB(true), # bytes
+          :ram_size => 4.GiB,
           :virtual_size => nil
         })
         operating_system({
@@ -98,14 +98,14 @@ site :rennes do |site_uid|
           :kernel => "2.6.19.1"
         })
         storage_devices [
-          {:interface => 'SATA', :size => 160.GB(false), :driver => "mptsas"}
+          {:interface => 'SATA', :size => 160.GB, :driver => "mptsas"}
           ]
         network_adapters [
-            {:interface => 'Myri-10G', :rate => 10.giga, 
+            {:interface => 'Myri-10G', :rate => 10.G, 
               :switch => "c6509-grid", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"), 
               :vendor => 'Myrinet', :version => "10G-PCIE-8A-C", :enabled => true},
-            {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "bnx2"},
-            {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "bnx2"}
+            {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "bnx2"},
+            {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "bnx2"}
           ]        
       end
     end
@@ -127,7 +127,7 @@ site :rennes do |site_uid|
           :vendor => "Intel",
           :model => "Intel Xeon",
           :version => "L5420",
-          :clock_speed => 2.5.giga,
+          :clock_speed => 2.5.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
@@ -136,7 +136,7 @@ site :rennes do |site_uid|
           :cache_l2 => nil
         })
         main_memory({
-          :ram_size => 32.GB(true), # bytes
+          :ram_size => 32.GiB,
           :virtual_size => nil
         })
         operating_system({
@@ -146,11 +146,11 @@ site :rennes do |site_uid|
           :kernel => "2.6.28"
         })
         storage_devices [
-          {:interface => 'SATA', :size => 160.GB(false), :driver => "ata_piix"}
+          {:interface => 'SATA', :size => 160.GB, :driver => "ata_piix"}
           ]
         network_adapters [
-            {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "e1000e"},
-            {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "e1000e"}
+            {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "e1000e"},
+            {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "e1000e"}
           ]        
       end
     end
diff --git a/generators/input/sophia.rb b/generators/input/sophia.rb
index 2f0f550b4b6c7c90841f5016d345d37047795f45..b39e83fa291ff2213ff2fbebbc5458255edf400a 100755
--- a/generators/input/sophia.rb
+++ b/generators/input/sophia.rb
@@ -28,16 +28,16 @@ site :sophia do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "246",
-          :clock_speed => 2.giga,
+          :clock_speed => 2.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB          
+          :cache_l2 => 1.MiB          
         })
         main_memory({
-          :ram_size => 2.GB(true), # bytes
+          :ram_size => 2.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -46,14 +46,14 @@ site :sophia do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'IDE', :size => 80.GB(false), :driver => "amd74xx"}
+          {:interface => 'IDE', :size => 80.GB, :driver => "amd74xx"}
           ]
         network_adapters [
-          {:interface => 'Myri-2000', :rate => 2.giga, :enabled => true, 
+          {:interface => 'Myri-2000', :rate => 2.G, :enabled => true, 
             :switch => "cisco1", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :vendor => 'Myrinet', :version => "M3F-PCIXF-2"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "tg3"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "tg3"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "tg3"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "tg3"}
           ]   
       end
     end
@@ -74,16 +74,16 @@ site :sophia do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "275",
-          :clock_speed => 2.2.giga,
+          :clock_speed => 2.2.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB          
+          :cache_l2 => 1.MiB          
         })
         main_memory({
-          :ram_size => 4.GB(true), # bytes
+          :ram_size => 4.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -92,17 +92,17 @@ site :sophia do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SAS', :size => 73.GB(false), :driver => "mptsas", :raid => "0"},
-          {:interface => 'SAS', :size => 73.GB(false), :driver => "mptsas", :raid => "0"}
+          {:interface => 'SAS', :size => 73.GB, :driver => "mptsas", :raid => "0"},
+          {:interface => 'SAS', :size => 73.GB, :driver => "mptsas", :raid => "0"}
           ]
         network_adapters [
-          {:interface => 'Myri-2000', :rate => 2.giga, :enabled => true, 
+          {:interface => 'Myri-2000', :rate => 2.G, :enabled => true, 
             :switch => "edgeiron48gs", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :vendor => 'Myrinet', :version => "M3F-PCIXF-2"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :driver => "e1000"},  
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "e1000"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "e1000"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "e1000"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :driver => "e1000"},  
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "e1000"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "e1000"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "e1000"}
           ]          
       end
     end
@@ -123,16 +123,16 @@ site :sophia do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "2218",
-          :clock_speed => 2.6.giga,
+          :clock_speed => 2.6.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 4.GB(true), # bytes
+          :ram_size => 4.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -141,15 +141,15 @@ site :sophia do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 250.GB(false), :driver => "sata_nv"}
+          {:interface => 'SATA', :size => 250.GB, :driver => "sata_nv"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => "fastiron", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :vendor => "NVIDIA", :version => "MCP55 Pro"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, :vendor => "NVIDIA", :version => "MCP55 Pro"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :vendor => "Broadcom", :version => "BCM5715c"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :vendor => "Broadcom", :version => "BCM5715c"}            
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, :vendor => "NVIDIA", :version => "MCP55 Pro"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :vendor => "Broadcom", :version => "BCM5715c"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :vendor => "Broadcom", :version => "BCM5715c"}            
           ]          
       end
     end
diff --git a/generators/input/toulouse.rb b/generators/input/toulouse.rb
index 14f222647697c74f9fc943af9bc63e6c836bbf5a..c1734d1df0fa873c20a3766070faddbebb6e7f4a 100755
--- a/generators/input/toulouse.rb
+++ b/generators/input/toulouse.rb
@@ -29,7 +29,7 @@ site :toulouse do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "248",
-          :clock_speed => 2.2.giga,
+          :clock_speed => 2.2.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
@@ -38,7 +38,7 @@ site :toulouse do |site_uid|
           :cache_l2 => nil
         })
         main_memory({
-          :ram_size => 2.GB(true), # bytes
+          :ram_size => 2.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -47,13 +47,13 @@ site :toulouse do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SCSI', :size => 73.GB(false), :driver => "mptspi"}
+          {:interface => 'SCSI', :size => 73.GB, :driver => "mptspi"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => "cict-switch", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :driver => "tg3"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :driver => "tg3"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :driver => "tg3"}
           ]  
       end      
     end
@@ -75,16 +75,16 @@ site :toulouse do |site_uid|
           :vendor => "AMD",
           :model => "AMD Opteron",
           :version => "2218",
-          :clock_speed => 2.6.giga,
+          :clock_speed => 2.6.G,
           :instruction_set => "",
           :other_description => "",
           :cache_l1 => nil,
           :cache_l1i => nil,
           :cache_l1d => nil,
-          :cache_l2 => 1.MB
+          :cache_l2 => 1.MiB
         })
         main_memory({
-          :ram_size => 8.GB(true), # bytes
+          :ram_size => 8.GiB, # bytes
           :virtual_size => nil
         })
         operating_system({
@@ -93,15 +93,15 @@ site :toulouse do |site_uid|
           :version => nil
         })
         storage_devices [
-          {:interface => 'SATA', :size => 250.GB(false), :driver => "sata_nv"}
+          {:interface => 'SATA', :size => 250.GB, :driver => "sata_nv"}
           ]
         network_adapters [
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => true, 
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => true, 
             :switch => "r4", :network_address => "#{node_uid}.#{site_uid}.grid5000.fr", :ip => dns_lookup("#{node_uid}.#{site_uid}.grid5000.fr"),
             :vendor => "NVIDIA", :version => "MCP55 Pro", :driver => "forcedeth"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :vendor => "NVIDIA", :version => "MCP55 Pro", :driver => "forcedeth"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :vendor => "Broadcom", :version => "BCM5715c", :driver => "tg3"},
-          {:interface => 'Ethernet', :rate => 1.giga, :enabled => false, :vendor => "Broadcom", :version => "BCM5715c", :driver => "tg3"}
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :vendor => "NVIDIA", :version => "MCP55 Pro", :driver => "forcedeth"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :vendor => "Broadcom", :version => "BCM5715c", :driver => "tg3"},
+          {:interface => 'Ethernet', :rate => 1.G, :enabled => false, :vendor => "Broadcom", :version => "BCM5715c", :driver => "tg3"}
           ]  
       end      
     end
diff --git a/generators/lib/core_extensions.rb b/generators/lib/core_extensions.rb
index e03c75f47b4cdb7809be032d1ffcce90131b5cdf..7b06bca9995b5f7d64e71d6ef87209bf10ab3cba 100755
--- a/generators/lib/core_extensions.rb
+++ b/generators/lib/core_extensions.rb
@@ -1,21 +1,18 @@
 class Numeric
 
-  def TB(correct = true)
-    if correct then self*1024**4; else self.tera/(1.024**4); end
-  end
-  # Returns the number of bytes.
-  #
-  # If you know that the provided number is not correct (in the case of hard drive capacities for example),
-  # setting +correct+ to +false+ will return the "real" number of bytes (e.g. HD 160GB has in reality 149011611938.477 bytes).
-  def GB(correct = true)
-    if correct then self*1024**3; else self.giga/(1.024**3); end
-  end
-  def MB(correct = true)
-    if correct then self*1024**2; else self.mega/(1.024**2); end
+  def K;    self*10**3;     end
+  def M;    self*10**6;     end
+  def G;    self*10**9;     end
+  def T;    self*10**12;    end
+  
+  { 
+    :KiB => 1024, :MiB => 1024**2, :GiB => 1024**3, :TiB => 1024**4,
+    :KB => 1.K/1.024, :MB => 1.M/1.024**2, :GB => 1.G/1.024**3, :TB => 1.T/1.024**4
+  }.each do |method, multiplier|
+    define_method(method) do
+      self*multiplier
+    end
   end
-  def mega; self*1_000_000; end
-  def giga; self*1_000_000_000; end
-  def tera; self*1_000_000_000_000; end
 end
 
 class String