diff --git a/Rakefile b/Rakefile
index 6b5d609f568bc2ca8a6557ec348f427cf351a64b..58565c8172a45e4039fc0db93f4b64c012b3f737 100644
--- a/Rakefile
+++ b/Rakefile
@@ -100,10 +100,12 @@ namespace :valid do
 end
 
 namespace :gen do
-  desc "Run wiki generator -- parameters: NAME={hardware,site_hardware,oar_properties,...} SITE={global,grenoble,...} DO={diff,print,update}"
+  desc "Run wiki generator -- parameters: NAME={hardware,site_hardware,oar_properties,...} SITE={global,grenoble,...} DO={diff,print,update} [CONFDIR=...]"
   task "wiki" do
     require 'refrepo/gen/wiki'
     options = {}
+    options[:conf_dir] = ENV['CONFDIR'] if ENV['CONFDIR']
+    options[:output_dir] = PUPPET_ODIR
     options[:sites] = ( ENV['SITE'] ? ENV['SITE'].split(',') : ['global'] + G5K_SITES )
     if ENV['NAME']
       options[:generators] = ENV['NAME'].split(',')
@@ -201,7 +203,7 @@ namespace :gen do
 
   namespace :puppet do
 
-    all_puppet_tasks = [:bindg5k, :conmang5k, :dhcpg5k, :kadeployg5k, :lanpowerg5k, :kavlang5k, :kwollectg5k, :network_monitoring, :'refapi-subset', :oxidizedg5k, :'sub-simplifier-aliases']
+    all_puppet_tasks = [:bindg5k, :conmang5k, :dhcpg5k, :kadeployg5k, :lanpowerg5k, :kavlang5k, :kwollectg5k, :network_monitoring, :'refapi-subset', :oxidizedg5k, :'oarsub-simplifier-aliases']
 
     all_puppet_tasks.each { |t|
       generated_desc = (t == :'refapi-subset') ? 'description' : 'configuration'
diff --git a/lib/refrepo/gen/puppet/oarsub-simplifier-aliases.rb b/lib/refrepo/gen/puppet/oarsub-simplifier-aliases.rb
index 54759e7f2cde67aeca15c5d7c734228b7eba1275..d63eb8b5c1bec07d46cc76f7b35616d32455b059 100644
--- a/lib/refrepo/gen/puppet/oarsub-simplifier-aliases.rb
+++ b/lib/refrepo/gen/puppet/oarsub-simplifier-aliases.rb
@@ -11,37 +11,60 @@ def get_sub_simplifier_default_aliases(options)
   raise("Error: file #{options[:conf_dir]}/aliases.yaml does not exist. The given configuration path is incorrect") unless Pathname("#{options[:conf_dir]}/aliases.yaml").exist?
 
   default_aliases = YAML.load(File.read("#{options[:conf_dir]}/aliases.yaml"))
-  default_aliases.merge!(GPURef.get_all_aliases.transform_values { |value| "gpu_model='#{value}'" })
+
+  gpu_aliases = GPURef.get_all_aliases.map do |al, model|
+    [al, {'value' => "gpu_model='#{model}'",
+          'desc' => "Select node(s) with #{model} GPU",
+          'category' => 'GPUs'}]
+  end.to_h
+
+  default_aliases.merge!(gpu_aliases)
+  mem_aliases = {}
   mem_multipliers = [24, 32]
   mem_multipliers.each do |i|
     while i <= 1024 do
-      default_aliases["#{i}GB"] = "memnode>=#{i*1024}"
+      mem_aliases["#{i}GB"] = {}
+      mem_aliases["#{i}GB"]['value'] = "memnode>=#{i*1024}"
+      mem_aliases["#{i}GB"]['category'] = 'Memory'
+      mem_aliases["#{i}GB"]['desc'] = "Select node(s) with #{i}GB RAM or more"
       i *= 2
     end
   end
+  mem_aliases = mem_aliases.sort_by { |key, _| key.scan(/\d+/).first.to_i }.to_h
+  default_aliases.merge!(mem_aliases)
 
   default_aliases
 end
 
 def generate_puppet_oarsub_simplifier_aliases(options)
   default_aliases = get_sub_simplifier_default_aliases(options)
+  sites_aliases = generate_all_sites_aliases
 
   options[:sites].each do |site|
     output_file = "#{options[:output_dir]}/platforms/production/modules/generated/files/grid5000/oar-sub-simplifier/#{site}-aliases.yaml"
-    gen_aliases_yaml(site, output_file, default_aliases)
+    generate_site_aliases_yaml(output_file, default_aliases, sites_aliases[site])
   end
 end
 
-def gen_aliases_yaml(site, output_path, default_aliases)
+def generate_all_sites_aliases
   aliases = {}
-  aliases.merge!(default_aliases)
-
   site_data_hierarchy = load_data_hierarchy
-  site_data_hierarchy['sites'][site]['clusters'].each_key do |cluster|
-    aliases[cluster] = "cluster='#{cluster}'"
-    aliases["#{cluster}-%d"] = "host='#{cluster}-%d.#{site}.grid5000.fr'"
+  site_data_hierarchy['sites'].each_key do |site|
+    aliases[site] = {}
+    site_data_hierarchy['sites'][site]['clusters'].each_key do |cluster|
+      aliases[site][cluster] = "cluster='#{cluster}'"
+      aliases[site]["#{cluster}-%d"] = "host='#{cluster}-%d.#{site}.grid5000.fr'"
+    end
   end
 
+  aliases
+end
+
+def generate_site_aliases_yaml(output_path, default_aliases, site_aliases)
+  aliases = {}
+  aliases.merge!(default_aliases.map { |al, tr| [al, tr['value']] }.to_h)
+  aliases.merge!(site_aliases)
+
   output_file = File.new(output_path, 'w')
   output_file.write(YAML.dump(aliases))
 end
diff --git a/lib/refrepo/gen/wiki.rb b/lib/refrepo/gen/wiki.rb
index 192f836ff25bf82e18df331795c5a4615abecdf9..03582c6f639cfbe1d1294395cb2b854c8f7d5444 100644
--- a/lib/refrepo/gen/wiki.rb
+++ b/lib/refrepo/gen/wiki.rb
@@ -9,6 +9,7 @@ require 'refrepo/gen/wiki/generators/site_network'
 require 'refrepo/gen/wiki/generators/status'
 require 'refrepo/gen/wiki/generators/group_storage'
 require 'refrepo/gen/wiki/generators/kwollect_metrics'
+require 'refrepo/gen/wiki/generators/oarsub_simplifier_aliases'
 
 module RefRepo::Gen::Wiki
 
@@ -40,6 +41,10 @@ module RefRepo::Gen::Wiki
     'kwollect_metrics' => {
       :gen => KwollectMetricsGenerator,
       :page => 'Generated/KwollectMetrics'
+    },
+    'oarsub_simplifier_aliases' => {
+      :gen => OarsubSimplifierAliasesGenerator,
+      :page => 'Generated/OarsubSimplifierAliases'
     }
   }
   SITE_GENERATORS = {
diff --git a/lib/refrepo/gen/wiki/generators/cpu_parameters.rb b/lib/refrepo/gen/wiki/generators/cpu_parameters.rb
index 550765aba45fb335babaf94632958ac28252fa6d..ea365a7c4f252c56fe00d1d2fd312baa4299df40 100644
--- a/lib/refrepo/gen/wiki/generators/cpu_parameters.rb
+++ b/lib/refrepo/gen/wiki/generators/cpu_parameters.rb
@@ -5,7 +5,7 @@ class CPUParametersGenerator < WikiGenerator
     super(page_name)
   end
 
-  def generate_content
+  def generate_content(_options)
 
     table_columns = ["Installation date", "Site", "Cluster", "CPU Family", "CPU Version", "Microarchitecture", "Frequency", "Server type", "HT enabled", "Turboboost enabled", "P-State driver", "C-State driver"]
     table_data = []
diff --git a/lib/refrepo/gen/wiki/generators/disk_reservation.rb b/lib/refrepo/gen/wiki/generators/disk_reservation.rb
index 8489b70f41af7288403aa72a992033736ec7f61d..a3bc7a918a3fb2e5510b1f482fe780c032ec5953 100644
--- a/lib/refrepo/gen/wiki/generators/disk_reservation.rb
+++ b/lib/refrepo/gen/wiki/generators/disk_reservation.rb
@@ -6,7 +6,7 @@ class DiskReservationGenerator < WikiGenerator
     super(page_name)
   end
 
-  def generate_content
+  def generate_content(_options)
     table_columns = ["Site", "Cluster", "Number of nodes", "Number of reservable disks per node"]
     table_data = []
     global_hash = get_global_hash
diff --git a/lib/refrepo/gen/wiki/generators/group_storage.rb b/lib/refrepo/gen/wiki/generators/group_storage.rb
index 9e6f9d6422cac7bae88a0f8db58ca8b9423c3e0d..5350889e8132d2547f3e7eadb458997e105450f3 100644
--- a/lib/refrepo/gen/wiki/generators/group_storage.rb
+++ b/lib/refrepo/gen/wiki/generators/group_storage.rb
@@ -6,7 +6,7 @@ class GroupStorageGenerator < WikiGenerator
     super(page_name)
   end
 
-  def generate_content
+  def generate_content(_options)
     table_columns = ["Site", "Server Name", "Size", "Link Speed", "Notes"]
     table_data = []
     global_hash = get_global_hash
diff --git a/lib/refrepo/gen/wiki/generators/hardware.rb b/lib/refrepo/gen/wiki/generators/hardware.rb
index c662eaad11886b33f543b4359df70769036ca7cb..28f25ea6f88315aee793f410d9349b4af0825b67 100644
--- a/lib/refrepo/gen/wiki/generators/hardware.rb
+++ b/lib/refrepo/gen/wiki/generators/hardware.rb
@@ -7,7 +7,7 @@ class G5KHardwareGenerator < WikiGenerator
     super(page_name)
   end
 
-  def generate_content
+  def generate_content(_options)
     @global_hash = get_global_hash
     @site_uids = G5K::SITES
 
diff --git a/lib/refrepo/gen/wiki/generators/kwollect_metrics.rb b/lib/refrepo/gen/wiki/generators/kwollect_metrics.rb
index d0061e4da7296cfcb7fa44efb6e9e4d0f8544738..3ba3532cd8cc0f844380544d68f785d9ea4afe8f 100644
--- a/lib/refrepo/gen/wiki/generators/kwollect_metrics.rb
+++ b/lib/refrepo/gen/wiki/generators/kwollect_metrics.rb
@@ -6,7 +6,7 @@ class KwollectMetricsGenerator < WikiGenerator
     super(page_name)
   end
 
-  def generate_content
+  def generate_content(_options)
     @generated_content = "__NOEDITSECTION__\n"
     @generated_content = "\nMetrics marked with * must be activated on demand, and metrics marked with ** are activated on non-deploy jobs by default.\n\n"
     @generated_content += "{|class=\"wikitable\"\n"
diff --git a/lib/refrepo/gen/wiki/generators/oar_properties.rb b/lib/refrepo/gen/wiki/generators/oar_properties.rb
index c4976e740c2cdc06004567083d8d9af50e9dc184..3f77b51d35aff8ca912bbe08d8e58844045703ae 100644
--- a/lib/refrepo/gen/wiki/generators/oar_properties.rb
+++ b/lib/refrepo/gen/wiki/generators/oar_properties.rb
@@ -264,7 +264,7 @@ class OarPropertiesGenerator < WikiGenerator
     "String"
   end
 
-  def generate_content
+  def generate_content(_options)
     refapi = load_data_hierarchy
     #Properties generated from oar-properties generator
     props = {}
diff --git a/lib/refrepo/gen/wiki/generators/oarsub_simplifier_aliases.rb b/lib/refrepo/gen/wiki/generators/oarsub_simplifier_aliases.rb
new file mode 100644
index 0000000000000000000000000000000000000000..ebcd89264a601b315e017231fead71f152eace04
--- /dev/null
+++ b/lib/refrepo/gen/wiki/generators/oarsub_simplifier_aliases.rb
@@ -0,0 +1,37 @@
+# coding: utf-8
+
+require 'refrepo/gen/puppet/oarsub-simplifier-aliases'
+
+class OarsubSimplifierAliasesGenerator < WikiGenerator
+  def initialize(page_name)
+    super(page_name)
+  end
+
+  def generate_content(options)
+    default_aliases = get_sub_simplifier_default_aliases(options)
+    default_aliases_by_category = {}
+    default_aliases.each do |al, data|
+      default_aliases_by_category[data['category']] ||= {}
+      default_aliases_by_category[data['category']][al] = data
+    end
+
+    @generated_content = "__NOEDITSECTION__\n"
+    default_aliases_by_category.sort.each do |cat, data|
+      @generated_content += "=== #{cat} ===\n"
+      @generated_content += "{|class=\"wikitable\"\n"
+      @generated_content += "! style=\"width: 15%\" | Alias\n"
+      @generated_content += "! style=\"width: 30%\" | Description\n"
+      @generated_content += "! style=\"width: 30%\" | Translate to\n"
+
+      data.each do |al, c|
+        @generated_content += "|-\n"
+        @generated_content += "|#{al}\n"
+        @generated_content += "|#{c['desc']}\n"
+        @generated_content += "|<code>#{c['value']}</code>\n"
+      end
+
+      @generated_content += "|}\n"
+      @generated_content += "\n"
+    end
+  end
+end
diff --git a/lib/refrepo/gen/wiki/generators/site_hardware.rb b/lib/refrepo/gen/wiki/generators/site_hardware.rb
index 3445690bd46010e58323d4f24a80c63e05fdfaa8..992b8517783750f15a27b91616362dd1cda816e0 100644
--- a/lib/refrepo/gen/wiki/generators/site_hardware.rb
+++ b/lib/refrepo/gen/wiki/generators/site_hardware.rb
@@ -9,7 +9,7 @@ class SiteHardwareGenerator < WikiGenerator
     @site = site
   end
 
-  def generate_content
+  def generate_content(_options)
     has_reservable_disks = false
     G5K::get_global_hash['sites'][@site]['clusters'].each do |_,c|
       c['nodes'].each do |_,n|
diff --git a/lib/refrepo/gen/wiki/generators/site_network.rb b/lib/refrepo/gen/wiki/generators/site_network.rb
index 2c8c50eb9c3f70ea53a4f3d09be1db7c100aaa92..44b601bcda7db4e8e3136631f793aa7f1df9c0e5 100644
--- a/lib/refrepo/gen/wiki/generators/site_network.rb
+++ b/lib/refrepo/gen/wiki/generators/site_network.rb
@@ -26,7 +26,7 @@ class SiteNetworkGenerator < WikiGenerator
     return h['network_equipments'].to_a.map { |e| "* #{e[0]}: #{e[1]['model']}" }.sort.join("\n")
   end
 
-  def generate_content
+  def generate_content(_options)
     @generated_content = "__NOTOC__\n__NOEDITSECTION__\n"
     @generated_content += "= Network devices models =\n"
     @generated_content += generate_equipments + "\n"
diff --git a/lib/refrepo/gen/wiki/generators/status.rb b/lib/refrepo/gen/wiki/generators/status.rb
index 8e44d75e89043033e853b079cb61fda1bfb8aa02..5ae0d4c3c0252ebb77befa542a1cf56580c0aae5 100644
--- a/lib/refrepo/gen/wiki/generators/status.rb
+++ b/lib/refrepo/gen/wiki/generators/status.rb
@@ -6,7 +6,7 @@ class StatusGenerator < WikiGenerator
     super(page_name)
   end
 
-  def generate_content
+  def generate_content(_options)
     @global_hash = get_global_hash
     @site_uids = G5K::SITES
 
diff --git a/lib/refrepo/gen/wiki/wiki_generator.rb b/lib/refrepo/gen/wiki/wiki_generator.rb
index 96731a8fc1940e3885a99a1536820fb71fa272e1..fa6c54f0c298c11284424e98feff61f9a40a71ee 100644
--- a/lib/refrepo/gen/wiki/wiki_generator.rb
+++ b/lib/refrepo/gen/wiki/wiki_generator.rb
@@ -29,7 +29,7 @@ class WikiGenerator
     end
   end
 
-  def generate_content
+  def generate_content(_options)
     raise "To be implemented in actual generators"
   end
 
@@ -114,7 +114,7 @@ class WikiGenerator
 
   #Execute actions on generator based on given options
   def exec(options)
-    generate_content()
+    generate_content(options)
 
     ret = true
     #Login only if we need to