diff --git a/app/models/user.rb b/app/models/user.rb
index ca44ac2..4a658c1 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,110 +1,120 @@
 class User < ActiveRecord::Base
 
   attr_accessor :password, :retype_password
 
   has_many :ownerships
   has_many :hosts, through: :ownerships, inverse_of: :users
   has_many :invitations
 
   enum user_type: { institutional: 0, vima: 1, okeanos: 2, admin: 3 }
 
   validates :user_type, presence: true
   validates :username, presence: true, uniqueness: { scope: :user_type }
   validates :email, presence: true, uniqueness: { scope: :user_type }
 
   before_create :confirm_passwords, if: :admin?
 
   # Returns an admin user with the given password
   #
   # @param username[String] username from user input
   # @param a_password[String] password from user input
   #
   # @return [User] the admin user or nil
   def self.fetch_admin_with_password(username, a_password)
     hashed_pass = Digest::SHA256.hexdigest(a_password + Rails.application.secrets.salt)
     admin = User.admin.find_by_username_and_password_hash(username, hashed_pass)
     admin
   end
 
   # Composes the user's display name from the user's username and email
   #
   # @return [String]
   def display_name
     "#{username} <#{email}>"
   end
 
   # Determines if the user must select hosts from a list or enter their
   # FQDN manually
   #
   # @return [Boolean]
   def needs_host_list?
     vima? || okeanos?
   end
 
   # Determines if the user is editable or not.
   # Editable users are only admin users, all others come from 3rd party authorization
   #
   # @return [Boolean]
   def editable?
     admin?
   end
 
   # Marks a user as not enabled
   def ban
     self.enabled = false
     save
   end
 
   # Marks a user as enabled
   def unban
     self.enabled = true
     save
   end
 
   # Stores a hashed password as a password_hash
   #
   # @param a_password[String] the user submitted password
   #
   # @return [Boolean] the save exit status
   def add_password(a_password)
     self.password_hash = Digest::SHA256.hexdigest(a_password + Rails.application.secrets.salt)
     self.save
   end
 
   # Fetches the user's unverified hosts
   #
   # @return [Array] of Strings containing the hosts' names
   def unverified_hosts
     hosts.unverified.pluck(:name)
   end
 
   # Fetches the user's hosts that are being backed up by bacula
   #
   # @return [Array] of Strings configuration the host's names
   def baculized_hosts
     hosts.in_bacula.pluck(:name)
   end
 
   # Fetches the user's hosts that are NOT being backed up by bacula
   #
   # @return [Array] of Strings configuration the host's names
   def non_baculized_hosts
     hosts.not_baculized.pluck(:name)
   end
 
+  # Determines if a vima user needs to update his hosts' list
+  #
+  # @return [Boolean]
+  def refetch_hosts?
+    return false unless vima?
+    return true if hosts_updated_at.nil?
+
+    hosts_updated_at < Archiving.settings[:skip_host_fetch_time_period].ago
+  end
+
   private
 
   def confirm_passwords
     if password.blank?
       self.errors.add(:password, 'Must give a password')
       return false
     end
     if password != retype_password
       self.errors.add(:password, 'Passwords mismatch')
       self.errors.add(:retype_password, 'Passwords mismatch')
       return false
     end
 
     true
   end
 end
diff --git a/config/initializers/00_settings.rb b/config/initializers/00_settings.rb
index 3515547..259ddfc 100644
--- a/config/initializers/00_settings.rb
+++ b/config/initializers/00_settings.rb
@@ -1,11 +1,13 @@
 Archiving.settings director_name: YAML.load_file(Rails.root.join('config', 'bacula.yml'))[Rails.env].
   symbolize_keys[:director]
 
 Archiving.settings vima_oauth_enabled: true
 Archiving.settings institutional_authentication_enabled: true
 Archiving.settings okeanos_authentication_enabled: false
 
 Archiving.settings default_sender: 'admin@archiving.grnet.gr'
 Archiving.settings admin_email: 'admin@archiving.grnet.gr'
 
 Archiving.settings temp_db_retention: 3.days
+
+Archiving.settings skip_host_fetch_time_period: 1.month
diff --git a/db/migrate/20160125170032_add_hosts_updated_at_to_users.rb b/db/migrate/20160125170032_add_hosts_updated_at_to_users.rb
new file mode 100644
index 0000000..2de840d
--- /dev/null
+++ b/db/migrate/20160125170032_add_hosts_updated_at_to_users.rb
@@ -0,0 +1,11 @@
+class AddHostsUpdatedAtToUsers < ActiveRecord::Migration
+  def up
+    add_column :users, :hosts_updated_at, :datetime
+
+    User.vima.update_all(hosts_updated_at: Time.now)
+  end
+
+  def down
+    remove_column :users, :hosts_updated_at
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 5bc6190..7a28564 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1,438 +1,439 @@
 # encoding: UTF-8
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
 #
 # Note that this schema.rb definition is the authoritative source for your
 # database schema. If you need to create the application database on another
 # system, you should be using db:schema:load, not running all the migrations
 # from scratch. The latter is a flawed and unsustainable approach (the more migrations
 # you'll amass, the slower it'll run and the greater likelihood for issues).
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160124191156) do
+ActiveRecord::Schema.define(version: 20160125170032) do
 
   create_table "BaseFiles", primary_key: "BaseId", force: true do |t|
     t.integer "BaseJobId",           null: false
     t.integer "JobId",               null: false
     t.integer "FileId",    limit: 8, null: false
     t.integer "FileIndex"
   end
 
   add_index "BaseFiles", ["JobId"], name: "basefiles_jobid_idx", using: :btree
 
   create_table "CDImages", primary_key: "MediaId", force: true do |t|
     t.datetime "LastBurn", null: false
   end
 
   create_table "Client", primary_key: "ClientId", force: true do |t|
     t.binary  "Name",          limit: 255,             null: false
     t.binary  "Uname",         limit: 255,             null: false
     t.integer "AutoPrune",     limit: 1,   default: 0
     t.integer "FileRetention", limit: 8,   default: 0
     t.integer "JobRetention",  limit: 8,   default: 0
   end
 
   add_index "Client", ["Name"], name: "Name", unique: true, length: {"Name"=>128}, using: :btree
 
   create_table "Counters", id: false, force: true do |t|
     t.binary  "Counter",      limit: 255,             null: false
     t.integer "MinValue",                 default: 0
     t.integer "MaxValue",                 default: 0
     t.integer "CurrentValue",             default: 0
     t.binary  "WrapCounter",  limit: 255,             null: false
   end
 
   create_table "Device", primary_key: "DeviceId", force: true do |t|
     t.binary   "Name",                       limit: 255,             null: false
     t.integer  "MediaTypeId",                            default: 0
     t.integer  "StorageId",                              default: 0
     t.integer  "DevMounts",                              default: 0
     t.integer  "DevReadBytes",               limit: 8,   default: 0
     t.integer  "DevWriteBytes",              limit: 8,   default: 0
     t.integer  "DevReadBytesSinceCleaning",  limit: 8,   default: 0
     t.integer  "DevWriteBytesSinceCleaning", limit: 8,   default: 0
     t.integer  "DevReadTime",                limit: 8,   default: 0
     t.integer  "DevWriteTime",               limit: 8,   default: 0
     t.integer  "DevReadTimeSinceCleaning",   limit: 8,   default: 0
     t.integer  "DevWriteTimeSinceCleaning",  limit: 8,   default: 0
     t.datetime "CleaningDate"
     t.integer  "CleaningPeriod",             limit: 8,   default: 0
   end
 
   create_table "File", primary_key: "FileId", force: true do |t|
     t.integer "FileIndex",              default: 0
     t.integer "JobId",                              null: false
     t.integer "PathId",                             null: false
     t.integer "FilenameId",                         null: false
     t.integer "DeltaSeq",   limit: 2,   default: 0
     t.integer "MarkId",                 default: 0
     t.binary  "LStat",      limit: 255,             null: false
     t.binary  "MD5",        limit: 255
   end
 
   add_index "File", ["JobId", "PathId", "FilenameId"], name: "JobId_2", using: :btree
   add_index "File", ["JobId"], name: "JobId", using: :btree
 
   create_table "FileSet", primary_key: "FileSetId", force: true do |t|
     t.binary   "FileSet",    limit: 255, null: false
     t.binary   "MD5",        limit: 255
     t.datetime "CreateTime"
   end
 
   create_table "Filename", primary_key: "FilenameId", force: true do |t|
     t.binary "Name", null: false
   end
 
   add_index "Filename", ["Name"], name: "Name", length: {"Name"=>255}, using: :btree
 
   create_table "Job", primary_key: "JobId", force: true do |t|
     t.binary   "Job",             limit: 255,             null: false
     t.binary   "Name",            limit: 255,             null: false
     t.binary   "Type",            limit: 1,               null: false
     t.binary   "Level",           limit: 1,               null: false
     t.integer  "ClientId",                    default: 0
     t.binary   "JobStatus",       limit: 1,               null: false
     t.datetime "SchedTime"
     t.datetime "StartTime"
     t.datetime "EndTime"
     t.datetime "RealEndTime"
     t.integer  "JobTDate",        limit: 8,   default: 0
     t.integer  "VolSessionId",                default: 0
     t.integer  "VolSessionTime",              default: 0
     t.integer  "JobFiles",                    default: 0
     t.integer  "JobBytes",        limit: 8,   default: 0
     t.integer  "ReadBytes",       limit: 8,   default: 0
     t.integer  "JobErrors",                   default: 0
     t.integer  "JobMissingFiles",             default: 0
     t.integer  "PoolId",                      default: 0
     t.integer  "FileSetId",                   default: 0
     t.integer  "PriorJobId",                  default: 0
     t.integer  "PurgedFiles",     limit: 1,   default: 0
     t.integer  "HasBase",         limit: 1,   default: 0
     t.integer  "HasCache",        limit: 1,   default: 0
     t.integer  "Reviewed",        limit: 1,   default: 0
     t.binary   "Comment"
   end
 
   add_index "Job", ["Name"], name: "Name", length: {"Name"=>128}, using: :btree
 
   create_table "JobHisto", id: false, force: true do |t|
     t.integer  "JobId",                                   null: false
     t.binary   "Job",             limit: 255,             null: false
     t.binary   "Name",            limit: 255,             null: false
     t.binary   "Type",            limit: 1,               null: false
     t.binary   "Level",           limit: 1,               null: false
     t.integer  "ClientId",                    default: 0
     t.binary   "JobStatus",       limit: 1,               null: false
     t.datetime "SchedTime"
     t.datetime "StartTime"
     t.datetime "EndTime"
     t.datetime "RealEndTime"
     t.integer  "JobTDate",        limit: 8,   default: 0
     t.integer  "VolSessionId",                default: 0
     t.integer  "VolSessionTime",              default: 0
     t.integer  "JobFiles",                    default: 0
     t.integer  "JobBytes",        limit: 8,   default: 0
     t.integer  "ReadBytes",       limit: 8,   default: 0
     t.integer  "JobErrors",                   default: 0
     t.integer  "JobMissingFiles",             default: 0
     t.integer  "PoolId",                      default: 0
     t.integer  "FileSetId",                   default: 0
     t.integer  "PriorJobId",                  default: 0
     t.integer  "PurgedFiles",     limit: 1,   default: 0
     t.integer  "HasBase",         limit: 1,   default: 0
     t.integer  "HasCache",        limit: 1,   default: 0
     t.integer  "Reviewed",        limit: 1,   default: 0
     t.binary   "Comment"
   end
 
   add_index "JobHisto", ["JobId"], name: "JobId", using: :btree
   add_index "JobHisto", ["StartTime"], name: "StartTime", using: :btree
 
   create_table "JobMedia", primary_key: "JobMediaId", force: true do |t|
     t.integer "JobId",                  null: false
     t.integer "MediaId",                null: false
     t.integer "FirstIndex", default: 0
     t.integer "LastIndex",  default: 0
     t.integer "StartFile",  default: 0
     t.integer "EndFile",    default: 0
     t.integer "StartBlock", default: 0
     t.integer "EndBlock",   default: 0
     t.integer "VolIndex",   default: 0
   end
 
   add_index "JobMedia", ["JobId", "MediaId"], name: "JobId", using: :btree
 
   create_table "Location", primary_key: "LocationId", force: true do |t|
     t.binary  "Location", limit: 255,             null: false
     t.integer "Cost",                 default: 0
     t.integer "Enabled",  limit: 1
   end
 
   create_table "LocationLog", primary_key: "LocLogId", force: true do |t|
     t.datetime "Date"
     t.binary   "Comment",                            null: false
     t.integer  "MediaId",                default: 0
     t.integer  "LocationId",             default: 0
     t.string   "NewVolStatus", limit: 9,             null: false
     t.integer  "NewEnabled",   limit: 1
   end
 
   create_table "Log", primary_key: "LogId", force: true do |t|
     t.integer  "JobId",   default: 0
     t.datetime "Time"
     t.binary   "LogText",             null: false
   end
 
   add_index "Log", ["JobId"], name: "JobId", using: :btree
 
   create_table "Media", primary_key: "MediaId", force: true do |t|
     t.binary   "VolumeName",       limit: 255,             null: false
     t.integer  "Slot",                         default: 0
     t.integer  "PoolId",                       default: 0
     t.binary   "MediaType",        limit: 255,             null: false
     t.integer  "MediaTypeId",                  default: 0
     t.integer  "LabelType",        limit: 1,   default: 0
     t.datetime "FirstWritten"
     t.datetime "LastWritten"
     t.datetime "LabelDate"
     t.integer  "VolJobs",                      default: 0
     t.integer  "VolFiles",                     default: 0
     t.integer  "VolBlocks",                    default: 0
     t.integer  "VolMounts",                    default: 0
     t.integer  "VolBytes",         limit: 8,   default: 0
     t.integer  "VolParts",                     default: 0
     t.integer  "VolErrors",                    default: 0
     t.integer  "VolWrites",                    default: 0
     t.integer  "VolCapacityBytes", limit: 8,   default: 0
     t.string   "VolStatus",        limit: 9,               null: false
     t.integer  "Enabled",          limit: 1,   default: 1
     t.integer  "Recycle",          limit: 1,   default: 0
     t.integer  "ActionOnPurge",    limit: 1,   default: 0
     t.integer  "VolRetention",     limit: 8,   default: 0
     t.integer  "VolUseDuration",   limit: 8,   default: 0
     t.integer  "MaxVolJobs",                   default: 0
     t.integer  "MaxVolFiles",                  default: 0
     t.integer  "MaxVolBytes",      limit: 8,   default: 0
     t.integer  "InChanger",        limit: 1,   default: 0
     t.integer  "StorageId",                    default: 0
     t.integer  "DeviceId",                     default: 0
     t.integer  "MediaAddressing",  limit: 1,   default: 0
     t.integer  "VolReadTime",      limit: 8,   default: 0
     t.integer  "VolWriteTime",     limit: 8,   default: 0
     t.integer  "EndFile",                      default: 0
     t.integer  "EndBlock",                     default: 0
     t.integer  "LocationId",                   default: 0
     t.integer  "RecycleCount",                 default: 0
     t.datetime "InitialWrite"
     t.integer  "ScratchPoolId",                default: 0
     t.integer  "RecyclePoolId",                default: 0
     t.binary   "Comment"
   end
 
   add_index "Media", ["PoolId"], name: "PoolId", using: :btree
   add_index "Media", ["VolumeName"], name: "VolumeName", unique: true, length: {"VolumeName"=>128}, using: :btree
 
   create_table "MediaType", primary_key: "MediaTypeId", force: true do |t|
     t.binary  "MediaType", limit: 255,             null: false
     t.integer "ReadOnly",  limit: 1,   default: 0
   end
 
   create_table "Path", primary_key: "PathId", force: true do |t|
     t.binary "Path", null: false
   end
 
   add_index "Path", ["Path"], name: "Path", length: {"Path"=>255}, using: :btree
 
   create_table "PathHierarchy", primary_key: "PathId", force: true do |t|
     t.integer "PPathId", null: false
   end
 
   add_index "PathHierarchy", ["PPathId"], name: "pathhierarchy_ppathid", using: :btree
 
   create_table "PathVisibility", id: false, force: true do |t|
     t.integer "PathId",                       null: false
     t.integer "JobId",                        null: false
     t.integer "Size",   limit: 8, default: 0
     t.integer "Files",            default: 0
   end
 
   add_index "PathVisibility", ["JobId"], name: "pathvisibility_jobid", using: :btree
 
   create_table "Pool", primary_key: "PoolId", force: true do |t|
     t.binary  "Name",               limit: 255,             null: false
     t.integer "NumVols",                        default: 0
     t.integer "MaxVols",                        default: 0
     t.integer "UseOnce",            limit: 1,   default: 0
     t.integer "UseCatalog",         limit: 1,   default: 0
     t.integer "AcceptAnyVolume",    limit: 1,   default: 0
     t.integer "VolRetention",       limit: 8,   default: 0
     t.integer "VolUseDuration",     limit: 8,   default: 0
     t.integer "MaxVolJobs",                     default: 0
     t.integer "MaxVolFiles",                    default: 0
     t.integer "MaxVolBytes",        limit: 8,   default: 0
     t.integer "AutoPrune",          limit: 1,   default: 0
     t.integer "Recycle",            limit: 1,   default: 0
     t.integer "ActionOnPurge",      limit: 1,   default: 0
     t.string  "PoolType",           limit: 9,               null: false
     t.integer "LabelType",          limit: 1,   default: 0
     t.binary  "LabelFormat",        limit: 255
     t.integer "Enabled",            limit: 1,   default: 1
     t.integer "ScratchPoolId",                  default: 0
     t.integer "RecyclePoolId",                  default: 0
     t.integer "NextPoolId",                     default: 0
     t.integer "MigrationHighBytes", limit: 8,   default: 0
     t.integer "MigrationLowBytes",  limit: 8,   default: 0
     t.integer "MigrationTime",      limit: 8,   default: 0
   end
 
   add_index "Pool", ["Name"], name: "Name", unique: true, length: {"Name"=>128}, using: :btree
 
   create_table "RestoreObject", primary_key: "RestoreObjectId", force: true do |t|
     t.binary  "ObjectName",                                       null: false
     t.binary  "RestoreObject",     limit: 2147483647,             null: false
     t.binary  "PluginName",        limit: 255,                    null: false
     t.integer "ObjectLength",                         default: 0
     t.integer "ObjectFullLength",                     default: 0
     t.integer "ObjectIndex",                          default: 0
     t.integer "ObjectType",                           default: 0
     t.integer "FileIndex",                            default: 0
     t.integer "JobId",                                            null: false
     t.integer "ObjectCompression",                    default: 0
   end
 
   add_index "RestoreObject", ["JobId"], name: "JobId", using: :btree
 
   create_table "Status", primary_key: "JobStatus", force: true do |t|
     t.binary  "JobStatusLong"
     t.integer "Severity"
   end
 
   create_table "Storage", primary_key: "StorageId", force: true do |t|
     t.binary  "Name",        limit: 255,             null: false
     t.integer "AutoChanger", limit: 1,   default: 0
   end
 
   create_table "UnsavedFiles", primary_key: "UnsavedId", force: true do |t|
     t.integer "JobId",      null: false
     t.integer "PathId",     null: false
     t.integer "FilenameId", null: false
   end
 
   create_table "Version", id: false, force: true do |t|
     t.integer "VersionId", null: false
   end
 
   create_table "configuration_settings", force: true do |t|
     t.string   "job",        default: "{}"
     t.string   "client",     default: "{}"
     t.datetime "created_at"
     t.datetime "updated_at"
     t.string   "pool",       default: "{}"
   end
 
   create_table "filesets", force: true do |t|
     t.string   "name"
     t.integer  "host_id"
     t.text     "exclude_directions"
     t.text     "include_directions"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
 
   add_index "filesets", ["host_id"], name: "index_filesets_on_host_id", using: :btree
 
   create_table "hosts", force: true do |t|
     t.binary   "name",                       limit: 255,                 null: false
     t.binary   "fqdn",                       limit: 255,                 null: false
     t.integer  "port",                                                   null: false
     t.integer  "file_retention",                                         null: false
     t.integer  "job_retention",                                          null: false
     t.datetime "created_at"
     t.datetime "updated_at"
     t.string   "password"
     t.boolean  "baculized",                              default: false, null: false
     t.datetime "baculized_at"
     t.integer  "status",                     limit: 1,   default: 0
     t.integer  "client_id"
     t.boolean  "verified",                               default: false
     t.datetime "verified_at"
     t.integer  "verifier_id"
     t.string   "job_retention_period_type"
     t.string   "file_retention_period_type"
     t.integer  "origin",                     limit: 1
   end
 
   add_index "hosts", ["name"], name: "index_hosts_on_name", unique: true, length: {"name"=>128}, using: :btree
 
   create_table "invitations", force: true do |t|
     t.integer  "user_id"
     t.integer  "host_id"
     t.string   "verification_code"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
 
   add_index "invitations", ["user_id", "verification_code"], name: "index_invitations_on_user_id_and_verification_code", using: :btree
 
   create_table "job_templates", force: true do |t|
     t.string   "name",                                             null: false
     t.integer  "job_type",               limit: 1
     t.integer  "host_id"
     t.integer  "fileset_id"
     t.integer  "schedule_id"
     t.datetime "created_at"
     t.datetime "updated_at"
     t.boolean  "enabled",                          default: false
     t.binary   "restore_location"
     t.boolean  "baculized",                        default: false
     t.datetime "baculized_at"
     t.string   "client_before_run_file"
     t.string   "client_after_run_file"
   end
 
   create_table "ownerships", force: true do |t|
     t.integer  "user_id"
     t.integer  "host_id"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
 
   create_table "schedule_runs", force: true do |t|
     t.integer  "schedule_id"
     t.integer  "level",       limit: 1
     t.string   "month"
     t.string   "day"
     t.string   "time"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
 
   add_index "schedule_runs", ["schedule_id"], name: "index_schedule_runs_on_schedule_id", using: :btree
 
   create_table "schedules", force: true do |t|
     t.string  "name"
     t.string  "runs"
     t.integer "host_id"
   end
 
   add_index "schedules", ["host_id"], name: "index_schedules_on_host_id", using: :btree
 
   create_table "users", force: true do |t|
-    t.string   "username",                                null: false
+    t.string   "username",                                   null: false
     t.string   "email"
-    t.integer  "user_type",     limit: 1,                 null: false
-    t.boolean  "enabled",                 default: false
+    t.integer  "user_type",        limit: 1,                 null: false
+    t.boolean  "enabled",                    default: false
     t.datetime "created_at"
     t.datetime "updated_at"
     t.string   "identifier"
     t.string   "password_hash"
     t.datetime "login_at"
+    t.datetime "hosts_updated_at"
   end
 
   add_index "users", ["identifier"], name: "index_users_on_identifier", using: :btree
   add_index "users", ["password_hash"], name: "index_users_on_password_hash", using: :btree
 
 end