标签:des style http io ar color os sp for
作者:zhanhailiang 日期:2014-12-14
简介
twemproxy,也叫nutcracker,是twtter开源的Redis和Memcache代理服务器。
功能
- Fast.
- Lightweight.
- Maintains persistent server connections.
- Keeps connection count on the backend caching servers low.
- Enables pipelining of requests and responses.
- Supports proxying to multiple servers.
- Supports multiple server pools simultaneously.
- Shard data automatically across multiple servers.
- Implements the complete memcached ascii and redis protocol.
- Easy configuration of server pools through a YAML file.
- Supports multiple hashing modes including consistent hashing and distribution.
- Can be configured to disable nodes on failures.
- Observability through stats exposed on stats monitoring port.
- Works with Linux, *BSD, OS X and Solaris (SmartOS)
安装
从官网下载安装包编译并安装:distribution tarball:
[root@~/software/nutcracker-0.3.0]# ./configure --prefix=/usr/local/nutcracker-0.3.0
[root@~/software/nutcracker-0.3.0]# make
[root@~/software/nutcracker-0.3.0]# make install
[root@~/software/nutcracker-0.3.0]# cp -R conf /usr/local/nutcracker-0.3.0
[root@~/software/nutcracker-0.3.0]# ln -s /usr/local/nutcracker-0.3.0 /usr/local/nutcracker
[root@~/software/nutcracker-0.3.0]# ln -s /usr/local/nutcracker/sbin/nutcracker /usr/local/bin/nutcracker
配置
twemproxy支持通过YAML语法配置,其支持的指令集如下:
- listen: The listening address and port (name:port or ip:port) for this server pool.
- hash: The name of the hash function. Possible values are:
- one_at_a_time
- md5
- crc16
- crc32 (crc32 implementation compatible with libmemcached)
- crc32a (correct crc32 implementation as per the spec)
- fnv1_64
- fnv1a_64
- fnv1_32
- fnv1a_32
- hsieh
- murmur
- jenkins
- hash_tag: A two character string that specifies the part of the key used for hashing. Eg "{}" or "$$".Hash
tag enable mapping different keys to the same server as long as the part of the key within the tag is the same.
- distribution: The key distribution mode. Possible values are:
- timeout: The timeout value in msec that we wait for to establish a connection to the server or receive a response from a server. By default, we wait indefinitely.
- backlog: The TCP backlog argument. Defaults to 512.
- preconnect: A boolean value that controls if nutcracker should preconnect to all the servers in this pool on process start. Defaults to false.
- redis: A boolean value that controls if a server pool speaks redis or memcached protocol. Defaults to false.
- server_connections: The maximum number of connections that can be opened to each server. By default, we open at most 1 server connection.
- auto_eject_hosts: A boolean value that controls if server should be ejected temporarily when it fails consecutively server_failure_limit times. See liveness
recommendations for information. Defaults to false.
- server_retry_timeout: The timeout value in msec to wait for before retrying on a temporarily ejected server, when auto_eject_host is set to true. Defaults to 30000 msec.
- server_failure_limit: The number of conseutive failures on a server that would leads to it being temporarily ejected when auto_eject_host is set to true. Defaults to 2.
- servers: A list of server address, port and weight (name:port:weight or ip:port:weight) for this server pool.
以本文为例,配置一个Redis代理和一个Memcache代理服务如下:
[root@~/software/nutcracker-0.3.0]# cat /usr/local/nutcracker/conf/nutcracker.yml
alpha:
listen: 127.0.0.1:22121
hash: fnv1a_64
hash_tag: "{}"
distribution: ketama
auto_eject_hosts: false
timeout: 400
redis: true
servers:
- 127.0.0.1:6379:1
beta:
listen: 127.0.0.1:22122
hash: fnv1a_64
distribution: ketama
timeout: 400
backlog: 1024
preconnect: true
auto_eject_hosts: true
server_retry_timeout: 2000
server_failure_limit: 3
servers:
- 127.0.0.1:11211:1
- 127.0.0.1:11212:1
其中,Redis实例 127.0.0.1:6379 和 Memcache实例 127.0.0.1:11211 127.0.0.1:11212 请预先启动好。
/etc/init.d/redis_6379 start
/usr/local/memcached-1.4.20/bin/memcached -d -m 64 -l 127.0.0.1 -p 11211 -u root
/usr/local/memcached-1.4.20/bin/memcached -d -m 64 -l 127.0.0.1 -p 11212 -u root
测试
https://github.com/billfeller/billfeller.github.io/blob/master/code/twenproxyTest.php
启动服务:
[root@/usr/local/nutcracker/conf]# nutcracker -c nutcracker.yml
[Sun Dec 14 20:59:04 2014] nc.c:187 nutcracker-0.3.0 built for Linux 2.6.32-431.23.3.el6.x86_64 x86_64 started on pid 14359
[Sun Dec 14 20:59:04 2014] nc.c:192 run, rabbit run / dig that hole, forget the sun / and when at last the work is done / don‘t sit down / it‘s time to dig another one
执行测试脚本:
[root@~/wade/git/billfeller.github.io/code]# /usr/local/php/bin/php twenproxyTest.php
bool(true)
string(1) "1"
int(1)
bool(false)
bool(true)
int(2)
bool(true)
int(3)
bool(true)
bool(false)
Redis/Memcache代理服务Twemproxy简介
标签:des style http io ar color os sp for
原文地址:http://blog.csdn.net/billfeller/article/details/41929089