Redis and its many use cases

Redis and its many uses
Christian Joudrey - @cjoudrey

‘‘Redis is an open source,
advanced key-value store.

’’

SET name "fido"
GET name
=> "fido"

LPUSH friends "Tom"
LPUSH friends "Sam"
LLEN friends
=> 2

LPUSH RPUSH

Sam Tom

LRANGE friends 0 0
=> ["Sam"]
LRANGE friends 0 -1
=> ["Sam", "Tom"]

Download it
http://redis.io/download

... and try it ...
$ redis-cli
redis> SET name "Chris"
OK
redis> GET name
"Chris"

GitHub
http://git.io/redis

... or via npm ...
$ npm install redis

var redis = require('redis'),
client = redis.createClient();

function getSomeValue (callback) {
client.get('someVal', function (err, val) {
if (val) return callback(null, val);
// Do call directly to Db
// and cache result.
});
};

var app = require('express').createServer();
var RedisStore = require('connect-redis')(express);

app.use(express.session({
secret: 'keyboard cat', store: new RedisStore
}));

app.get('/', function(req, res){
res.send('hello world');
});

app.listen(3000);

http://expressjs.com/guide.html#session-support

Chat Chat
Server Server

Load
Balancer

1) Download image
2) Resize image with GD

Node
Server

GET /image_resize?url=http://...

orker Job
Resize
Queue
Workers

1) Download image Node
2) Resize image with GD
Server

GET /image_resize?url=http://...

Kue
https://github.com/learnboost/kue

There's a lot more!
11 Common Web Use Cases Solved in Redis
http://bit.ly/pgDmXn

Redis and its many use cases

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