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Applied Redis
- 1. Applied Redis Barcamp Saigon 2012
- 2. About me @hotrannam KMS Technology
- 3. take away
- 6. big O
- 7. do it right ( data model & query performance )
- 8. redis???
- 9. data structure server
- 10. data types
- 11. #1 strings #2 hashes #3 lists #4 sets #5 sorted sets
- 12. data examples Keys Values page:index.html <html><head>[…] string login_count 7464 users_logged_in_today {1, 2, 3, 4, 5} set latest_post_ids [201, 204, 205] list user:123:session time => 10927353 hash username => joe users_and_scores joe ~ 1348 sorted set fred ~ 938 chris ~ 2832
- 13. command examples SET my_key “my value” GET my_key INCR next_post_id EXPIRE my_key 1234 TTL my_key DEL my_key field value EXISTS my_key HSET product:1 id 1 HSET product:1 name “iPad” HSET product:1 available 10
- 14. commands have its big O ( mostly )
- 15. and beyond
- 16. bring to life
- 17. #1 cache data
- 18. #2 who is online # add to friends set SADD users:nam:friends duy SADD users:nam:friends khoi # add to online set SADD online nam SADD online nghia SADD online khoi # get online friends – {khoi} SINTER users:nam:friends online
- 19. #3 leaderboard ( ranking ) # add to leaderboard (sorted set) ZADD leaderboard <score> <player> # get top 5 ZREVRANGEBYSCORE leaderboard +inf –inf WITHSCORES LIMIT 0 5 # get rank of Khoi ZREVRANK leaderboard Khoi # get 5 players around Khoi ZREVRANGEBYSCORE leaderboard +inf –inf WITHSCORES LIMIT 2 5
- 20. #4 cross-app communication # web app SUBSCRIBE chat PUBLISH chat “Hello! I’m web app.” # mobile app SUBSCRIBE chat PUBLISH chat “Hi! I’m mobile app.”
- 21. Thank you!