Redis - Fast and Furiousnosqlberlin.de/slides/NoSQLBerlin-Redis.pdf · 2009-11-01 · Redis - Fast and Furious N ... Redis Protocol - The Rest Random list/set access Intersections,

Mathias Meyer, 22.10.2009Peritor GmbH

Redis - Fast and FuriousN✮SQL Berlin

Donnerstag, 22. Oktober 2009

Self

I work at Peritor in Berlin

I tweet @roidrage

I code at http://github.com/mattmatt

I blog at http://paperplanes.de

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http://github.com/mattmatt

http://github.com/mattmatt

http://paperplanes.de

http://paperplanes.de

Peritor

Working on

http://scalarium.com

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Redis - Key-Value Store

Simple, yet awesome

Fast, yet nonvolatile

code.google.com/p/redis

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http://code.google.com/p/redis

http://code.google.com/p/redis

Redis

REmote DIctionary Server

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Redis

Went public in March 2009

Just reached 1.0

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Redis

< 6000 lines of code

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Redis

And the code is simple

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Redis

No threading, just one process

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Redis

Like Memcached, only awesome

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Redis

Simple and efficient text-based protocol

(just like grandma and Memcached used to make)

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Redis Protocol

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Redis Protocol

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redis[“key”] = “value”


Redis Protocol

Duh!

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Redis Protocol

Values can be strings, lists or sets

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Redis Protocol - Special Ops

Push and pop elements (atomic)

Fetch arbitrary set and array elements

Sorting

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Redis Protocol

set foo 4

1000

+OK

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Redis Protocol

set foo 4

1000

+OK

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Request

Response


Redis Protocol

get foo

$4

1000

get bar

$-1

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Redis Protocol

get foo

$4

1000

get bar

$-1

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Request

Response

RequestResponse


Redis Protocol

incr foo

:1001

type foo

+string

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Redis Protocol - Lists

lpush pizza 4

fury

+OK

rpush pizza 8

ortolana

+OK

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lrange pizza 0 1

*2

$4

fury

$8

ortolana

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lrange pizza 0 1

*2

$4

fury

$8

ortolana

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Request

Response


Redis Protocol - Sets

sadd mq 8

rabbitmq

:1

sadd mq 6

zeromq

:1

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smembers mq

*2

$6

zeromq

$8

rabbitmq

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sort mq alpha

*2

$8

rabbitmq

$6

zeromq

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Redis Protocol - The Rest

Random list/set access

Intersections, Unions

Monitoring

Controlling the Server

Multi-Set Commands

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Redis

Data is held in memory, but can be persisted

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Redis Key-Value Database

Persistent

Asynchronous

Just like Super Pursuit Mode

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Redis Database

Data is written to disk asynchronously

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Redis Database

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Redis Server

Redis Serverfork()

Dump Database

exit()

rename()


Redis Database

save 900 1

save 300 10

save 60 100000

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Replication

1 Master - N Slaves

Asynchronous on Master

Synchronous on Slave

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Redis ReplicationLike dumping the database, only to a different file descriptor.

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Redis Master

Redis Slave Redis Slave

Redis SlaveRedis Slave

Redis Replication

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Redis - Scaling

Horizontal• Run multiple Redis processes

• Use HashRing (e.g. in redis-rb)

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Redis - Scaling

Vertical• Master-Slave setup

• Fetch data from any slave (e.g. random)

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To Redis, or not to Redis?

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As always, it depends

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To Redis

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CachingStatistical dataRecoverable stateWorker queue


Not to Redis

100% consistent dataset requiredData is larger than memory

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Redis Use Cases

Nanite - A self-assembling cluster of Ruby daemons

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The most important question!

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Is it faster than Memcached?

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No, but fast enough for you(if you need the extra features)

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Redis

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Simple, fast, awesome.


Questions?

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Documents

Redis - Fast and Furiousnosqlberlin.de/slides/NoSQLBerlin-Redis.pdf · 2009-11-01 · Redis - Fast and Furious N ... Redis Protocol - The Rest Random list/set access Intersections,