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 $?