PStore

Output_after_several_runs

{:id=>"580485385", :idDomain=>"QB"}
"R801382384"
{:id=>"073411161", :idDomain=>"QB"}
"R307406722"
{:id=>"237431841", :idDomain=>"QB"}
"R782613781"
{:id=>"370276320", :idDomain=>"QB"}

pstore.rb

require "pstore"
xref = PStore.new("xref.pstore")
xref.transaction do
  xref["R#{Array.new(9){rand(9)}.join}"] = {:id => Array.new(9){rand(9)}.join, :idDomain => "QB"}
end

xref.transaction(true) do
  xref.roots.each do |data_root_name|
    p data_root_name
    p xref[data_root_name]
  end
end