Redis: Data Cheeseburgers

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Redis Data Cheeseburgers

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Redis Data Cheeseburgers 1/43 - 3%

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Nick Quaranto 2/43 - 5%

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3/43 - 7%

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rubygems.org 4/43 - 10%

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@qrush nick@quaran.to litanyagainstfear.com 5/43 - 12%

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Redis 6/43 - 14%

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no 7/43 - 17%

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yes 8/43 - 19%

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persist data as you think of it 9/43 - 21%

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LRANGE 0 -1 basics data types use cases 10/43 - 24%

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basics 11/43 - 26%

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history 12/43 - 28%

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installing 13/43 - 31%

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drivers ruby python java php node.js ... 14/43 - 33%

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memory keys, values keys must stay in memory values can be swapped really stable 15/43 - 35%

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speed ANSI C 110,000 SETs/second 81,000 GETs/second pipelining 16/43 - 38%

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misc 17/43 - 40%

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data types 18/43 - 42%

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strings like memcached simple data expiration renaming multiple get/set 19/43 - 45%

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> set fries done OK > get fries done > del fries 1 > set fries done OK > expire 60 1 > get fries nil 20/43 - 47%

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counters incr incrby decr decrby completely atomic 21/43 - 49%

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> incr burgers 1 > incrby burgers 42 43 > decr burgers 42 22/43 - 52%

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lists push/pop length random access ranges 23/43 - 54%

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> rpush order burger 1 > rpush order hotdog 2 > rpush order fries 3 > lrange order 0 -1 1. burger 2. hotdog 3. fries > lpop order burger > rpop order fries > lindex order 0 hotdog 24/43 - 56%

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sets unique elements basic functionality from lists intersect union difference 25/43 - 59%

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> sadd meat bacon 1 > sadd meat turkey 1 > sadd toppings bacon 1 > sadd toppings bacon 0 > sinter meat toppings 1. bacon > sdiff meat toppings 1. turkey 26/43 - 61%

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sorted sets (zset) {key => float} atomic increments ranges by score or rank union/intersect 27/43 - 63%

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> zadd menu 4.99 burger 1 > zadd menu 2.99 shake 1 > zadd menu 1.99 fries 1 > zrank menu fries 0 > zscore menu fries 1.99 > zrange menu 0 -1 1. fries 2. shake 3. burger > zrangebyscore menu 2 5 1. shake 2. burger > zremrangebyscore menu 2 5 28/43 - 66%

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hashes {key => value} atomic increments like zset set, get, del, exists, len get all keys, values, or both 29/43 - 68%

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> hset orders nick burger 1 > hset orders john fries 1 > hget orders nick burger > hvals orders 1. burger 2. fries > hgetall orders 1. nick 2. burger 3. john 4. fries 30/43 - 70%

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use cases 31/43 - 73%

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boggle 32/43 - 75%

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boggle game id, score = counter guesses, dictionary = set words for a game = list 33/43 - 77%

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def load $redis.del "dict" dict = File.read("/usr/share/dict/words" dict.split.each do |word| if word =~ /^[a-z]{3,8}$/ $redis.sadd "dict", word.upcase end end end def word?(word) $redis.sismember("dict", word) end 34/43 - 80%

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queues 35/43 - 82%

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queues 36/43 - 84%

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analytics 37/43 - 87%

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analytics: gem downloads 38/43 - 89%

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on a gem download $redis.incr "downloads" $redis.incr "downloads:rubygem:rails" key = "downloads:version:rails-2.3.5" $redis.incr key $redis.zincrby "downloads:today", 1, key 39/43 - 91%

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daily rollover date = "2010-04-02" $redis.rename "dls:today", "dls:yesterday" dls = Hash[*$redis.zrange("dls:yesterday", 0, -1, "withscores")] dls.each do |key, score| ver = versions[key] $redis.hincrby ver, date, score $redis.hincrby ver.rubygem, date, score end 40/43 - 94%