Shulou(Shulou.com)06/01 Report--

Official main site: http://www.redis.io/

Download address: http://www.redis.cn/download.html

Command API: http://www.redis.cn/commands.html

Redis official document: http://redis.io/documentation

I. introduction to Redis:

Redis is the abbreviation of Remote Dictionary Server. He is essentially a Key/Value database, a NoSQL database similar to Memcached, but his data can be persisted on disk, solving the problem of no data loss after service restart. His values can be string (string), list (list), sets (collection) or ordered sets (sorted collection). All data types have operations such as push/pop, add/remove, union of execution server, intersection, difference between two sets sets, and so on. These operations are atomic, and Redis also supports a variety of different sorting capabilities.

II. Redis deployment

1. Install related dependency packages:

Yum-y install gcc gcc-c++ cmake make

two。 Install the tcmalloc package [try a new memory allocation method]

Redis does not implement its own memory pool and does not add its own stuff to the standard system memory allocator.

Therefore, the performance and fragmentation rate of the system memory allocator will have some impact on the performance of Redis.

In the latest version, jemalloc is already included in the source package as part of the source package, so it can be used directly.

If you want to use tcmalloc, you need to install it yourself.

Tcmalloc is part of google-proftools (http://code.google.com/p/gperftools/downloads/list))

So we actually need to install google-proftools. If you are installing on a 64-bit machine, you need to install the dependent libunwind library first. 32-bit systems do not need it.

Download address: http://download.savannah.gnu.org/releases/libunwind/libunwind-0.99-alpha.tar.gz

(1)。 Install libunwind

Tar zxvf libunwind-0.99-alpha.tar.gz

Cd libunwind-0.99-alpha/

CFLAGS=-fPIC. / configure

Make CFLAGS=-fPIC

Make CFLAGS=-fPIC install

(2)。 Install gperftools

Tar zxvf gperftools-2.1.tar.gz

Cd gperftools-2.1

. / configure-disable-cpu-profiler-disable-heap-profiler-disable-heap-checker-disable-debugalloc-enable-minimal

Make & & make install

Cd / usr/local/lib

Ln-sv libtcmalloc_minimal.so.4.1.2 libtcmalloc.so

# if you don't do the bold part, you will get an error when compiling redis: usr/bin/ld: cannot find ltcmalloc

Echo "/ usr/local/lib" > / etc/ld.so.conf.d/usr_local_lib.conf # if you don't have this file, create one yourself

/ sbin/ldconfig

3.Redis installation:

Tar zxvf redis-3.0.0.tar.gz

Cd redis-3.0.0

Mkdir-p / usr/local/redis-3.0

# make prefix= install

# install redis under / bin / usr/local/redis-3.0/bin

# make PREFIX=/usr/local/redis-3.0 install # installed this way, using the default memory allocation method of linux

Make PREFIX=/usr/local/redis-3.0 USE_TCMALLOC=yes FORCE_LIBC_MALLOC=yes install

4. Create related directories and configure redis.conf files [simple configuration]

Cd / usr/local/redis-3.0/

Mkdir etc # stores the configuration file, where the directory name can be created as: conf

Mkdir log # stores logs and pid files

Mkdir data # storing data

Vim etc/redis.conf

Daemonize yes

Port 6379

Pidfile / usr/local/redis-3.0/log/redis_6379.pid

Dir / usr/local/redis-3.0/data

Logfile / usr/local/redis-3.0/log/redis_6379.log

5.Redis service starts, shuts down

(1)。 Start the service:

/ usr/local/redis-3.0/bin/redis-server / usr/local/redis-3.0/etc/redis.conf

Note:

This command has only one startup parameter, specifies the configuration file in the directory, and performs the default configuration without parameters.

Test start:

/ usr/local/redis-3.0/bin/redis-cli ping

If PONG is returned, the startup is successful.

Check to see if the port is occupied:

Netstat-ntlp | grep 6379

(2)。 Shut down the service:

/ usr/local/redis-3.0/bin/redis-cli shutdown

If it is not the default port, you can specify the port:

/ usr/local/redis-3.0/bin/redis-cli-p 6380 shutdown

(3)。 Verify that tcmalloc is being used in redis memory allocation

Lsof-n | grep tcmalloc

Redis-ser 2754 root mem REG 253,0 1078467 1725996 / usr/local/lib/libtcmalloc_minimal.so.4.1.2

6.Redis service startup script

Redis itself provides a redis installation script: utils/install_server.sh

But this script includes the installation service, which is a bit annoying, so let's just take the installation script:

#! / bin/sh

# Configurations injected by install_server below....

EXEC=/usr/local/redis-3.0/bin/redis-server

CLIEXEC=/usr/local/redis-3.0/bin/redis-cli

PIDFILE=/usr/local/redis-3.0/log/redis_6379.pid

CONF= "/ usr/local/redis-3.0/etc/redis.conf"

REDISPORT= "6379"

Case "$1" in

Start)

If [- f $PIDFILE]

Then

Echo "$PIDFILE exists, process is already running or crashed"

Else

Echo "Starting Redis server..."

$EXEC $CONF

Fi

Stop)

If [!-f $PIDFILE]

Then

Echo "$PIDFILE does not exist, process is not running"

Else

PID=$ (cat $PIDFILE)

Echo "Stopping..."

$CLIEXEC-p $REDISPORT shutdown

While [- x / proc/$ {PID}]

Do

Echo "Waiting for Redis to shutdown..."

Sleep 1

Done

Echo "Redis stopped"

Fi

Status)

PID=$ (cat $PIDFILE)

If [!-x / proc/$ {PID}]

Then

Echo 'Redis is not running'

Else

Echo "Redis is running ($PID)"

Fi

Restart)

$0 stop

$0 start

*)

Echo "Please use start, stop, restart or status as first argument"

Esac

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