memodis
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levicook
redis backed memoization helpers
= memodis
semi-transparent memoization; backed by redis;
writes are sent to the master, reads are sent to an approriate slave.
Two features:
- Memodis#memoize
- Memodis::DistCache
== Example
def fib(num) return num if num < 2 fib(num - 1) + fib(num - 2) end
puts "Before memoize: " puts fib(33) => 3524578 # after ~ 7 seconds
extend Memodis memoize :fib, Memodis::DistCache.new({ :key_gen => lambda { |k| "fib(#{k})" }, :decoder => :integer, :expires => (10 * 60), :master => '127.0.0.1:16379 127.0.0.1:16380'.split, :slaves => '127.0.0.1:16389 127.0.0.1:16390 127.0.0.1:16391 127.0.0.1:16392 127.0.0.1:16393 127.0.0.1:16394'.split })
puts "After memoize: " puts fib(33) => 3524578 # after ~ 0.03 seconds puts fib(33) => 3524578 # after ~ 0.0001 seconds puts fib(33) => 3524578 # after ~ 0.0001 seconds
== Background
- http://blog.grayproductions.net/articles/caching_and_memoization
- http://code.google.com/p/redis & http://github.com/ezmobius/redis-rb
== Important Moving Parts
- http://code.google.com/p/redis/wiki/GetCommand
- http://code.google.com/p/redis/wiki/SetCommand
- http://code.google.com/p/redis/wiki/SetnxCommand
== Note on Patches/Pull Requests
- Fork the project.
- Make your feature addition or bug fix.
- Add tests for it. This is important so I don't break it in a future version unintentionally.
- Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
- Send me a pull request. Bonus points for topic branches.
== Copyright
Copyright (c) 2010 [email protected]. See LICENSE for details.
levicook