utils/redis-sha1.rb

   1 # redis-sha1.rb - Copyright (C) 2009 Salvatore Sanfilippo
   2 # BSD license, See the COPYING file for more information.
   3 #
   4 # Performs the SHA1 sum of the whole datset.
   5 # This is useful to spot bugs in persistence related code and to make sure
   6 # Slaves and Masters are in SYNC.
   7 #
   8 # If you hack this code make sure to sort keys and set elements as this are
   9 # unsorted elements. Otherwise the sum may differ with equal dataset.
  10
  11 require 'rubygems'
  12 require 'redis'
  13 require 'digest/sha1'
  14
  15 def redisSha1(opts={})
  16     sha1=""
  17     r = Redis.new(opts)
  18     r.keys('*').sort.each{|k|
  19         sha1 = Digest::SHA1.hexdigest(sha1+k)
  20         vtype = r.type?(k)
  21         if vtype == "string"
  22             sha1 = Digest::SHA1.hexdigest(sha1+r.get(k))
  23         elsif vtype == "list"
  24             sha1 = Digest::SHA1.hexdigest(sha1+r.list_range(k,0,-1).join("\x01"))
  25         elsif vtype == "set"
  26             sha1 = Digest::SHA1.hexdigest(sha1+r.set_members(k).to_a.sort.join("\x02"))
  27         end
  28     }
  29     sha1
  30 end
  31
  32 p "Dataset SHA1: #{redisSha1()}"