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![team.euruko.users javier diego matz nikos
team.teowaki.users javier diego alberto
team.euruko location:greece contact:nikos edition:2013
team.teowaki location:london contact:diego
tags.matz ruby mruby
tags.nikos ruby css
tags.javier ruby
tags.diego ruby chef
users.javier.teams euruko teowaki
users.alberto.teams teowaki
users.nikos.teams euruko
users.matz.teams euruko
users.diego.teams euruko teowaki
r.sunion r.smembers('team.euruko').map{|m| "tags.#{m}"}
=>["mruby", "ruby", "css", "chef"]
r.sinter r.smembers('team.euruko').map{|m| "tags.#{m}"}
=>["ruby"]
r.diff r.smembers('team.euruko').map{|m| "tags.#{m}"}
=>["mruby", "css", "chef"]](https://image.slidesharecdn.com/funwithrubyandredisjavierramirezeuruko2013-130702130114-phpapp02/75/Fun-with-Ruby-and-Redis-18-2048.jpg)
Uploaded byjavier ramirez
Fun with Ruby and Redis
Redis is an advanced open-source key-value store that functions as a data structure server with capabilities to handle various data types. It emphasizes speed and simplicity, providing a set of commands for managing data and supporting scripting with Lua for complex operations. Additionally, Redis can be used for caching and offers persistence options, but architects must plan accordingly for data durability and memory usage.
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Fun with Ruby and Redis
- 1.
- 2. What? Redis is anopen source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets. (http://redis.io) Salvatore Sanfilippo @antirez Pieter Noordhuis @pnoordhuis 95 contributors at https://github.com/antirez/redis Who?
- 3. The Redis Manifesto 1.ADSL for Abstract Data Types 2.Memory storage is #1 3.Fundamental data structures for a fundamental API 4.Two levels of API 5.Code is like a poem; it's not just something we write to reach some practical result 6.We're against complexity 7.We optimize for joy
- 4.
- 5. unscientific benchmarks* *on anAWS micro instance with the default install for postgresql and redis PostgreSQL Redis 1K inserts 3.9s 0.07s 1K reads 0.113s 0.06s 10K inserts 42.9s 0.67s 10K reads 1.15s 0.6s 100K inserts 6.8m 7s 100K reads 11.59s 6.06s 100K pipelined inserts - 1.45s 100K pipelined reads - 1.22s
- 6. Redis is gamechanging Disclaimer: after using it, you'll find yourself doing things you wouldn't do before
- 7. Some will notmake sense As every other technology, Redis has its sweet spot, but it's not a silver bullet
- 8.
- 9. In memory datastore Redis stores all the data in memory all the time. Plan your architecture accordingly
- 10. Persistance: RDB Compact binaryformat Saves snapshots every few minutes Good for backups and synchronizing If Redis crashes, a few minutes worth of data will be lost
- 11. Durability: AOF Log textformat Configurable durability Large file, can slow down startup If Redis crashes, typically one second of data could be lost
- 12. Connecting from Ruby redis-rbexposes calls to all the methods in the redis protocol other useful gems: github.com/soveran/nest => helps with key naming https://github.com/soveran/ohm => “ORM” for redis github.com/obie/redis_props => properties for AR objects github.com/nateware/redis-objects => map redis types to ruby objects github.com/agoragames/amico => redis-backed friendships
- 13. DATA TYPES Strings Hashes Lists Sets Sorted Sets Keyhandling Transactions Scripting Pub/Sub Server Connection untyped operations
- 14. STRING commands string commands append,get, getset, set getrange, setrange, strlen bitcount, bitop, getbit, setbit mget, mset, msetnx setnx, setex, psetex incr, incrby, incrbyfloat, decr, decrby, decrbyfloat
- 15. LIST commands llen, lindex,linsert, lrange, lrem, lset, ltrim lpop, lpush, lpushx, rpop, , rpush, rpushx blpop, brpop rpoplpush, brpoplpush List commands
- 16. Hash commands hkeys, hvals,hlen, hgetall, hexists hmget, hmset hdel, hget, hset, hsetnx hincrby, hincrbyfloat at the hash level at the attribute level
- 17. Set commands sadd, scard,smembers, sismember, srem, smove, srandmember, smove sdiff, sinter, sunion sdiffstore, sinterstore, sunionstore Set commands
- 18. team.euruko.users javier diegomatz nikos team.teowaki.users javier diego alberto team.euruko location:greece contact:nikos edition:2013 team.teowaki location:london contact:diego tags.matz ruby mruby tags.nikos ruby css tags.javier ruby tags.diego ruby chef users.javier.teams euruko teowaki users.alberto.teams teowaki users.nikos.teams euruko users.matz.teams euruko users.diego.teams euruko teowaki r.sunion r.smembers('team.euruko').map{|m| "tags.#{m}"} =>["mruby", "ruby", "css", "chef"] r.sinter r.smembers('team.euruko').map{|m| "tags.#{m}"} =>["ruby"] r.diff r.smembers('team.euruko').map{|m| "tags.#{m}"} =>["mruby", "css", "chef"]
- 19. sorted Set commands zadd,zcard, zcount zincrby, zrank, zrem,zrevrank, zscore zrange, zrangebyscore, zremrangebyrank, zrevrangebyscore, zrevrange, zrevrangebyscore zinterstore, zunionstore Sorted set commands
- 20. counters Atomic counters canbe safely invoked concurrently from anywhere You can create global sequences with counters. Redis-objects block semantics allow for rewinding on errors
- 21. Scripting with lua* Youcan use Lua for scripting Redis when you need to atomically execute a sequence of commands in which the output of a command is used as input for another It reduces the need to use complex lock mechanisms and simplifies dependencies between clients You can even extend the functionality of Redis by using Lua scripts * no, mruby won't be supported
- 22. LUA example Expiring attributesinside a Redis hash* 1 2 4 5 3
- 23. Temporary data Very simpleto implement usage quota patterns (even better if done in Lua) It's possible to set self-expiring keys
- 24. Redis as acache maxmemory 128mb maxmemory-policy allkeys-lru #save 900 1 #save 300 10 #save 60 10000 Expire keys individually or turn off persistence and use Redis as a cache system with automatic eviction Multiple levels of cache by using Redis on the webserver/ middleware layer http://wiki.nginx.org/HttpRedis https://github.com/jodosha/redis-store
- 25. Redis as aPUBSUB system
- 26.
- 27. Shameless self promotion Ifyou enjoyed this presentation, please thank me by registering on http://teowaki.com It's a site for developers, you can hang around for free, and I think it's quite cool <3 <3 <3 Javier Ramírez @supercoco9