redis 主从同步配置方案
今天研究了redis主从同步部分的配置，在这里留个备忘！

闲话少续，上配置！
这是redis-master.conf

daemonize yes
pidfile /var/run/redis-master.pid
port 6379
timeout 0
loglevel verbose
logfile stdout
databases 16
save 60 100
rdbcompression yes
dbfilename dump-master.rdb
dir /usr/local/redis/data
slave-serve-stale-data yes
requirepass ooxxoo
appendonly no 
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
slowlog-log-slower-than 10000
slowlog-max-len 128
maxclients 128
maxmemory 1gb
vm-enabled no
vm-swap-file /tmp/redis.swap
vm-max-memory 0
vm-page-size 32
vm-pages 134217728
vm-max-threads 4
hash-max-zipmap-entries 512
hash-max-zipmap-value 64
list-max-ziplist-entries 512
list-max-ziplist-value 64
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
activerehashing yes

这是redis-slave.conf

daemonize no
pidfile /var/run/redis-slave.pid
port 7379
timeout 0
loglevel verbose
logfile stdout
databases 16
save 60 100
rdbcompression yes
dbfilename dump-slave.rdb
dir /usr/local/redis/data
slave-serve-stale-data yes
slaveof 127.0.0.1 6379
masterauth ooxxoo
appendonly no
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
slowlog-log-slower-than 10000
slowlog-max-len 128
maxclients 128
maxmemory 1gb
vm-enabled no
vm-swap-file /tmp/redis.swap
vm-max-memory 0
vm-page-size 32
vm-pages 134217728
vm-max-threads 4
hash-max-zipmap-entries 512
hash-max-zipmap-value 64
list-max-ziplist-entries 512
list-max-ziplist-value 64
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
activerehashing yes

主要有几点需要注意：
1、 memory设置问题

WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.

需要执行脚本

# echo vm.overcommit_memory=1 >> /etc/sysctl.conf
# sysctl vm.overcommit_memory=1

2、要保证主配置中  slave-serve-stale-data yes
3、slaveof 127.0.0.1 6379
masterauth ooxxoo


密码一定要设置正确哦！

另外：由于redis rdb模式下会有部分数据处于未落地状态，停redis前最好执行
/usr/local/redis/redis-cli -h 127.0.0.1 -p 6379 -a pwd bgsave 保存下数据，然后再停止redis线程