Advanced Redis - by Russ Smith

Transcript

1. Advanced Redis Techniques

2. Redis is an open 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.

3. the basics

4. ca16403c13fc9 46:count":902} {KEY:VALUE} {"von:counter s:downloads:

5. lists[milk,egg s,cereal,baco n,salt,plates, oranges,lettu

6. {name:‘bob’,em ail:‘bob@gmail .com’,passwor d:‘password’} hashsES

7. So what makes it different?

8. Deep structural awareness in the storage layer.

9. push, pop, sets, sorted sets, pub/Sub, unions, intersect, etc

10. so what about the cool kids

11. Resque Sidekiq Fnordmetric VON leaderboard instagram spool twitter

12. USE the built in data structures

13. LPUSH mylist ‘work’ LPOP mylist => ‘work’

14. hset myhash count 0 hincrby myhash count 1 hget myhash

    count => 1

15. zadd myzset 1 “jim” zadd myzset 2 “bob” zrange myzset

    0 -1

16. store only what you need

17. TWEETID:USERID

18. USE the pipeline FOR roflscale

19. redis.pipelined do redis.set(‘foo’, ‘bar’) redis.incr(‘baz’) end

20. Optimize what you are storing

21. SET user:1234 5678

22. * 3,000,000 = 21gb

23. HSET ‘users:100’ ‘1234’ ‘5689’

24. * 3,000,000 = 5gb

25. hash-max-zipmap-entries 256 hash-max-zipmap-value 1024

26. Shard the data

27. lpush ‘users:20130313’ ‘bob’

28. GETting REALLY nerdy

29. setbit activeusers:20130313 231 1 setbit activeusers:20130313 102 1

30. devops tips

31. Write the data to disk

32. save 60 1000

33. Replicate for high availability & redundancy

34. slaveof 10.0.0.3

35. use Sentinel for automatic failover

36. None