codis实现redis分片和在线扩展
## codis自带有一个启动脚本，会启动两个codis-server，监听端口为6381和6382#./start_redis.sh
sleep 3s
09 Apr 14:28:02.796* Increased maximum number of open files to 10032 (it was originally set to1024).
_._
_.-``__ ''-._
_.-`` `.`_.''-._ Redis 2.8.13 (1e823fd3/1) 64 bit
.-`` .-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in stand alone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 6381
| `-._ `._ / _.-' | PID: 6294
`-._ `-._`-./_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
09 Apr14:28:02.814 # Server started, Redis version 2.8.13
09 Apr14:28:02.814 # WARNING overcommit_memory is set to 0! Background save may failunder low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to/etc/sysctl.conf and then reboot or run the command 'sysctlvm.overcommit_memory=1' for this to take effect.
09 Apr14:28:02.814 * The server is now ready to accept connections on port 6381
09 Apr14:28:02.795 * Increased maximum number of open files to 10032 (it wasoriginally set to 1024).
_._
_.-``__ ''-._
_.-`` `.`_.''-._ Redis 2.8.13 (1e823fd3/1) 64 bit
.-`` .-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in stand alone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 6382
| `-._ `._ / _.-' | PID: 6295
`-._ `-._`-./_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
09 Apr14:28:02.811 # Server started, Redis version 2.8.13
09 Apr14:28:02.811 # WARNING overcommit_memory is set to 0! Background save may failunder low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to/etc/sysctl.conf and then reboot or run the command 'sysctlvm.overcommit_memory=1' for this to take effect.
09 Apr 14:28:02.812 * The server is nowready to accept connections on port 6382
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