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REDIS:
INSTALLATION,
CONFIGURATION &
IMPLEMENTATION
Everything and Anything I.T
By
Abhijeet Shekhar

Installation
Linux: http://redis.io/download
Windows
1. Clone from Git repo:
https://github.com/MSOpenTech/redis
2. Unzip file from /redis/bin/release
(e.g. redisbin64.zip) to /redis
3. Important files:
? /redis/redis-server.exe
? /redis/redis-cli.exe

Configuration
? Configuration file: /redis/redis.conf
? It is possible to change a port (if you wish):
? For development environment it is useful to
change data persisting policy
port 6379
save 900 1
save 300 10
save 60 10000
save 10 1
save after 10 sec if at least 1 key changed

Running Redis Server
? Run /redis/bin/redis-server.exe and
specify configuration file to use
redis>redis-server redis.conf

Running Redis Client
? Run /redis/bin/redis-cli.exe
? Now you can play with Redis a little bit

Useful Commands
? Print all keys:
? Remove all keys from all databases
? Synchronously save the dataset to disk
KEYS *
FLUSHALL
SAVE

Redis keys
? Keys are binary safe - it is possible to use any
binary sequence as a key
? The empty string is also a valid key
? Too long keys are not a good idea
? Too short keys are often also not a good idea
("u:1000:pwd" versus "user:1000:password")
? Nice idea is to use some kind of schema, like:
"object-type:id:field"

Redis data types
Redis is often referred to as a data structure
server since keys can contain:
? Strings
? Lists
? Sets
? Hashes
? Sorted Sets

Redis Lists
? Lists of strings, sorted by insertion order
? Add elements to a Redis List pushing new
elements on the head (on the left) or on the tail
(on the right) of the list
? Max length: (2^32 - 1) elements
? Model a timeline in a social network, using LPUSH
to add new elements, and using LRANGE in order
to retrieve recent items
? Use LPUSH together with LTRIM to create a list
that never exceeds a given number of elements

Redis Sorted Sets
? Every member of a Sorted Set is associated with
score, that is used in order to take the sorted set
ordered, from the smallest to the greatest score
? You can do a lot of tasks with great performance
that are really hard to model in other kind of
databases
? Probably the most advanced Redis data type

Redis Hashes
? Map between string fields and string values
? Perfect data type to represent objects
HMSET user:1000 username abhi password 123 age 28
HGETALL user:1000
HSET user:1000 password 12345
HGETALL user:1000

Redis Operations
It is possible to run atomic operations on data
types:
? appending to a string
? incrementing the value in a hash
? pushing to a list
? computing set intersection, union and difference
? getting the member with highest ranking in a
sorted set

Redis client
? PHPRedis �C PHP Client for Redis
(https://github.com/nicolasff/phpredis)
? JRedis - Java Client for Redis
? Jedis - a blazingly small and sane Redis Java client
? Spring Data Redis

Configuration
By Redis.conf
port 6379
bind 127.0.0.1
maxclients 10000
maxmemory <bytes>
By script
$redis->config("GET", "*max-*-entries*");
$redis->config("SET", "dir",
"/var/run/redis/dumps/");

PHP code
<?php
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
$redis->set('key','value', 10); // Will set the key, if it
doesn't exist, with a ttl of 10 seconds
echo $redis->get(��key��);
?>

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Redis Installation Configuration And Implementation

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