REmote DIctionary Server Overview

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ipoval edited this page Aug 24, 2011 · 3 revisions

Redis – disk-backed in-memory database

Very fast, key / value, NoSQL store
Implementation: C / C++
Communication protocol: Telnet
Persistence: Snapshotting, AOF
Replication: Master-Slave
Atomic operations: Yes
Expiration: Yes
Usage: Rapidly changing data with a foreseeable database size (should fit mostly in memory)
License: BSD
Authors: Salvatore Sanfilippo, Pieter Noordhuis
Main site: http://redis.io

Support of many different abstract types: Strings, Lists, Sets, Sorted Sets, Hashes

How to Install:
```
brew install redis
```
How to Start it Up:
```
redis-server /usr/local/etc/redis.conf
```

Redis Recipies

We have an online game with a zillion of users. We want to display a leader board in real time. Every time an user plays a game, if it’s his best score, perform update: ZADD board 10000 player123. To display the leader board: ZREVRANGE board 0 99. Sorted sets are very powerful and can substitute with much better performance many SELECT * FROM ... ORDER BY ... queries.