• redis 数据的恢复测试


    1:redis配置dump.db固化方式,不打开aof,不修改iphosts,参数如下:

          

    # more IP addresses.
    #
    # Examples:
    #
    # bind 192.168.1.100 10.0.0.1
    # bind 127.0.0.1

    #bind 192.168.16.239

    # output for logging but daemonize, logs will be sent to /dev/null
    logfile "/opt/redis-3.0.2/redis.log"

    # like in the following example:
    #
    # save ""

    save 900 1
    save 300 10
    save 60 10000


    # The filename where to dump the DB
    dbfilename dump.rdb

    # The working directory.
    #
    # The DB will be written inside this directory, with the filename specified
    # above using the 'dbfilename' configuration directive.
    #
    # The Append Only File will also be created inside this directory.
    #
    # Note that you must specify a directory here, not a file name.
    dir /opt/redis-3.0.2/src/

    其他参数默认

    2:根据上述参数启动redis,并插入数据。

        /opt/redis-3.0.2/src

        ./redis-server ../redis.conf

        

    vim redis-setkey.sh  

    #!/bin/bash

    n=100000

    for (( i=n ;i>=1 ; i-- ))
    do
    echo $i

    redis-cli set liang$i aa

    done

        

    执行脚本,并监控后台日志输出:

    5763:M 18 Dec 09:48:30.820 * 1 changes in 900 seconds. Saving...
    5763:M 18 Dec 09:48:30.821 * Background saving started by pid 5843
    5843:C 18 Dec 09:48:30.887 * DB saved on disk
    5843:C 18 Dec 09:48:30.888 * RDB: 4 MB of memory used by copy-on-write
    5763:M 18 Dec 09:48:30.921 * Background saving terminated with success
    5763:M 18 Dec 09:49:31.011 * 10000 changes in 60 seconds. Saving...
    5763:M 18 Dec 09:49:31.012 * Background saving started by pid 27088
    27088:C 18 Dec 09:49:31.086 * DB saved on disk
    27088:C 18 Dec 09:49:31.086 * RDB: 6 MB of memory used by copy-on-write
    5763:M 18 Dec 09:49:31.112 * Background saving terminated with success
    5763:M 18 Dec 09:50:32.064 * 10000 changes in 60 seconds. Saving...
    5763:M 18 Dec 09:50:32.066 * Background saving started by pid 15041
    15041:C 18 Dec 09:50:32.163 * DB saved on disk
    15041:C 18 Dec 09:50:32.163 * RDB: 6 MB of memory used by copy-on-write
    5763:M 18 Dec 09:50:32.167 * Background saving terminated with success
    5763:M 18 Dec 09:51:33.048 * 10000 changes in 60 seconds. Saving...
    5763:M 18 Dec 09:51:33.050 * Background saving started by pid 2308
    2308:C 18 Dec 09:51:33.162 * DB saved on disk
    2308:C 18 Dec 09:51:33.162 * RDB: 8 MB of memory used by copy-on-write
    5763:M 18 Dec 09:51:33.250 * Background saving terminated with success
    5763:M 18 Dec 09:52:34.062 * 10000 changes in 60 seconds. Saving...
    5763:M 18 Dec 09:52:34.064 * Background saving started by pid 22023
    22023:C 18 Dec 09:52:34.216 * DB saved on disk
    22023:C 18 Dec 09:52:34.216 * RDB: 8 MB of memory used by copy-on-write
    5763:M 18 Dec 09:52:34.264 * Background saving terminated with success
    5763:M 18 Dec 09:53:35.089 * 10000 changes in 60 seconds. Saving...
    5763:M 18 Dec 09:53:35.090 * Background saving started by pid 8713
    8713:C 18 Dec 09:53:35.237 * DB saved on disk
    8713:C 18 Dec 09:53:35.237 * RDB: 4 MB of memory used by copy-on-write
    5763:M 18 Dec 09:53:35.291 * Background saving terminated with success

    客户端查看数据:

    [root@shell src]# redis-cli 

    127.0.0.1:6379> get liang1
    "aa"
    127.0.0.1:6379> get liang2
    "aa"
    127.0.0.1:6379> get liang10000
    "aa"
    127.0.0.1:6379> get liang100000
    "aa"

    1)关闭服务端,不修改配置,并重启服务,查看是否做了持久化,查询数据:

    5763:M 18 Dec 09:58:52.911 # User requested shutdown...
    5763:M 18 Dec 09:58:52.911 * Saving the final RDB snapshot before exiting.
    5763:M 18 Dec 09:58:53.050 * DB saved on disk
    5763:M 18 Dec 09:58:53.050 * Removing the pid file.
    5763:M 18 Dec 09:58:53.050 # Redis is now ready to exit, bye bye...
    8732:M 18 Dec 09:59:20.619 * Increased maximum number of open files to 10032 (it was originally set to 1024).
    _._
    _.-``__ ''-._
    _.-`` `. `_. ''-._ Redis 3.0.2 (00000000/0) 64 bit
    .-`` .-```. ```/ _.,_ ''-._
    ( ' , .-` | `, ) Running in standalone mode
    |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
    | `-._ `._ / _.-' | PID: 8732
    `-._ `-._ `-./ _.-' _.-'
    |`-._`-._ `-.__.-' _.-'_.-'|
    | `-._`-._ _.-'_.-' | http://redis.io
    `-._ `-._`-.__.-'_.-' _.-'
    |`-._`-._ `-.__.-' _.-'_.-'|
    | `-._`-._ _.-'_.-' |
    `-._ `-._`-.__.-'_.-' _.-'
    `-._ `-.__.-' _.-'
    `-._ _.-'
    `-.__.-'

    8732:M 18 Dec 09:59:20.621 # Server started, Redis version 3.0.2
    8732:M 18 Dec 09:59:20.730 * DB loaded from disk: 0.109 seconds
    8732:M 18 Dec 09:59:20.730 * The server is now ready to accept connections on port 6379

    [root@shell src]# redis-cli
    127.0.0.1:6379> get liang1
    "aa"
    127.0.0.1:6379> get liang100000
    "aa"

    2)关闭服务,修改配置:

      1:只修改dump.rdb参数路径,直接使用绝对路径:

        

    # Note that you must specify a directory here, not a file name.
    dir /opt/redis-3.0.2/src/

      

    [root@shell src]# redis-cli
    127.0.0.1:6379> get liang1
    "aa"
    127.0.0.1:6379> get liang100000
    "aa"

    发现数据存在。

      2:修改dump.rdb参数路径,直接使用绝对路径,并修改HOSTSIP地址:

        bind 192.168.16.239

        dir /opt/redis-3.0.2/src/

        

    [root@shell src]# ps aux|grep redis
    root 5767 0.0 0.0 100928 616 pts/0 S+ 09:32 0:00 tail -fn 200 redis.log
    root 8797 0.5 1.1 145620 17676 ? Ssl 10:08 0:00 ./redis-server 192.168.16.239:6379

    8797:M 18 Dec 10:08:15.737 * Increased maximum number of open files to 10032 (it was originally set to 1024).
    _._
    _.-``__ ''-._
    _.-`` `. `_. ''-._ Redis 3.0.2 (00000000/0) 64 bit
    .-`` .-```. ```/ _.,_ ''-._
    ( ' , .-` | `, ) Running in standalone mode
    |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
    | `-._ `._ / _.-' | PID: 8797
    `-._ `-._ `-./ _.-' _.-'
    |`-._`-._ `-.__.-' _.-'_.-'|
    | `-._`-._ _.-'_.-' | http://redis.io
    `-._ `-._`-.__.-'_.-' _.-'
    |`-._`-._ `-.__.-' _.-'_.-'|
    | `-._`-._ _.-'_.-' |
    `-._ `-._`-.__.-'_.-' _.-'
    `-._ `-.__.-' _.-'
    `-._ _.-'
    `-.__.-'

    8797:M 18 Dec 10:08:15.739 # Server started, Redis version 3.0.2
    8797:M 18 Dec 10:08:15.848 * DB loaded from disk: 0.109 seconds
    8797:M 18 Dec 10:08:15.848 * The server is now ready to accept connections on port 6379

    [root@shell src]# redis-cli -h 192.168.16.239
    192.168.16.239:6379> get liang1
    "aa"
    192.168.16.239:6379> get liang10000
    "aa"

    持久化正常,实例恢复正常,根据上述测试也可以证明,将dump.rdb文件拷贝到其他机器,将配置指向此文件路径,也可以恢复实例。

    2:在默认配置情况下,测试在不同路径下产生的dump.rdb的路径是否不同:

      dir ./

      

    [root@shell src]# pwd
    /opt/redis-3.0.2/src
    [root@shell src]# ./redis-server ../redis.conf

      dump.rdb生成路径为/opt/redis-3.0.2/src

      /opt/redis-3.0.2/src/redis-server /opt/redis-3.0.2/redis.conf

      当保存在硬盘的时候,路径为/root/dump.rdb

    3:为了使dump.rdb生成路径永远不变,保证此类情况下数据不丢失,采用启动脚本的方式:

      

    #!/bin/bash


    # Source function library.
    . /etc/rc.d/init.d/functions

    # Source networking configuration.
    . /etc/sysconfig/network

    # Check that networking is up.
    [ "$NETWORKING" = "no" ] && exit 0

    BIN="/usr/bin"
    CONFIGFILE="/etc/redis/redis.conf"
    PIDFILE="/var/run/redis-server.pid"
    LOCKFILE=${LOCKFILE-/var/lock/subsys/redis}
    STOP_TIMEOUT=${STOP_TIMEOUT-10}

    [ -r "$SYSCONFIG" ] && source "$SYSCONFIG"
    RETVAL=0

    prog="redis-server"
    desc="Redis Server"

    start(){
    if [ -e $PIDFILE ];then
    echo "$desc already running..."
    exit 1
    fi
    echo -n $"Starting $prog: "
    daemon $BIN/$prog $CONFIGFILE
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && touch ${LOCKFILE}

    return $RETVAL

    }

    stop(){
    #echo -n "----------------------------------------------------------------"
    echo -n $"Stopping $prog: "
    #echo -n "********************************************************************"
    killproc -d ${STOP_TIMEOUT} $prog
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && rm -rf ${LOCKFILE}
    return $RETVAL

    }

    case "$1" in
    start)
      start

      ;;

    stop)
      stop
      ;;
    restart)
      stop
      start
      ;;
    status)
      status $prog
      retval=$?
      ;;
    *)
      echo $"Usage: $0 {start|stop|status|restart}"
    esac

    useradd -o -M -s  /sbin/nologin redis1 -d /var/lib/redis1 -u 0 -g root  

    #!/bin/sh
    #
    # redis init file for starting up the redis daemon
    #
    # chkconfig: - 20 80
    # description: Starts and stops the redis daemon.

    # Source function library.
    . /etc/rc.d/init.d/functions

    name="redis-server"
    exec="/opt/redis-3.0.2/src/$name"
    pidfile="/var/run/redis/redis.pid"
    REDIS_CONFIG="/etc/redis/redis.conf"

    [ -e /etc/sysconfig/redis ] && . /etc/sysconfig/redis

    lockfile=/var/lock/subsys/redis

    start() {
    [ -f $REDIS_CONFIG ] || exit 6
    [ -x $exec ] || exit 5
    echo -n $"Starting $name: "
    daemon --user ${REDIS_USER-redis} "$exec $REDIS_CONFIG"
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
    }

    stop() {
    echo -n $"Stopping $name: "
    killproc -p $pidfile $name
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
    }

    restart() {
    stop
    start
    }

    reload() {
    false
    }

    rh_status() {
    status -p $pidfile $name
    }

    rh_status_q() {
    rh_status >/dev/null 2>&1
    }


    case "$1" in
    start)
    rh_status_q && exit 0
    $1
    ;;
    stop)
    rh_status_q || exit 0
    $1
    ;;
    restart)
    $1
    ;;
    reload)
    rh_status_q || exit 7
    $1
    ;;
    force-reload)
    force_reload
    ;;
    status)
    rh_status
    ;;
    condrestart|try-restart)
    rh_status_q || exit 0
    restart
    ;;
    *)
    echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart}"
    exit 2
    esac
    exit $?

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  • 原文地址:https://www.cnblogs.com/liangsky/p/5056583.html
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