Redis

Redis description and comparison with other nosql dbs

Transcript

1. Redis June 2013
2. Concerns of Web 2.0 • RDBS features : 1. Complicated SQL querys(join) 2. Real time read and write 3. Consistent transaction • High level requirement: 1. High scalability and availability 2. High performance of reading tons of data 3. High performance of concurrent reading & writing
3. どうしようかな。。。
4. Jim Gray(received the Turing Award in 1998) said “Memory is the new Disk, Disk is the new Tape”.
5. Cache Everywhere • Opcode Cache Compiles your code, speeds up execution • Data/User Cache Typical Key-Value storage • Reverse Proxy Cache Cache in between code and browser • Browser Cache Cache on the browser
6. NoSQL Databases Storage Type Written language Characteristics Replication Redis Key-Value C Consistency Partition Tolerance Persistence Master/slave memcached Key-Value C Consistency Partition Tolerance N/A mongoDB Document C++ Consistency Partition Tolerance Persistence Master/slave CouchDB Document Erlang High Availability Partition Tolerance Persistence Multi-master replication Cassandra Column Java High Availability Partition Tolerance Persistence N/A HBase Column Java Consistency Partition Tolerance Persistence Master/slave
7. NoSQL Databases Best Use Redis Rapidly changing data, frequently written, rarely read statistical data memcached Cache, small pieces of data with many concurrent connections mongoDB Dynamic queries, frequently written, rarely read statistical data CouchDB Accumulating, occasionally changing data with pre-defined queries Cassandra When you write more than you read (logging) HBase Random read write to large database
8. What is Redis Redis is an advanced key-value store. by Salvato Resanfilippo (@antirez)
9. BSD License Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: • Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. • Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. • All advertising materials mentioning features or use of this softwaremust display the following acknowledgement: This product includes software developed by the <organization>. • Neither the name of the <organization> nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
10. Advantages • Extremely fast: 110000 SETs/s & 81000 GETs/s • Rich Data types: strings, hashes, lists, sets and sorted sets • Atomic operation • Snapshotting(Asynchronous persistence) • TTL • Single-threaded(No contention)
11. Risk & Disaster Recovery • No backups means huge risk of data disappering 1.Snapshotting: save 900 1, save 300 1, save 60 10000 • Disaster Recovery 1.RDB(Snapshotting): save 900 1, save 300 1, save 60 10000 2.AOF(Append-only file): appendfsync always, appendfsync everysec, appendfsync no • Consistent hashing
12. Monitoring
13. Who's using Redis
14. Sample code
15. Redis vs Memcached Key Value
16. Redis vs Memcached
17. Redis vs Memcached
18. Redis vs Memcached
19. Supported languages ActionScript, C, C++, C#, Clojure, Common Lisp, Dart, Erlang, Go, Haskell, Haxe, Io, Java, Node.js, Lua, Objective-C, Perl, PHP, Pure Data, Python, R, Ruby, Scala, Smalltalk and Tcl.
21. Easy to learn
22. Tons of references
23. Hei Hei~
24. Thank you