memcache proxy magent

edisonlz

magent is a simple but useful proxy program for memcached servers.

It features:
keeps connections to memcached servers
supports following memcached commands
get gets
delete
incr decr
add set replace prepend append
cas
event-driven by using libevent library
supports ketama algorithm
backup servers farm
unix domain socket

http://code.google.com/p/memagent/

使用proxy 和未使用proxy 性能对比，未开启 ketama key allocation algorithm
测试环境
                                /  memcache 1
proxy ------------------
                                \  memcache 2


mc = memcache.Client(["memcache"])... n = time.time()... for i in xrange(100):...     mc.set("%s" % i * 10,i)...     ... for i in xrange(100):...     mc.get("%s" %  i * 10 )... ... print time.time() - n0.7 - 0.923: 99>>> mc = memcache.Client(["proxy"])... n = time.time()... for i in xrange(100):...     mc.set("%s" % i * 10,i)...     ... for i in xrange(100):...     mc.get("%s" %  i * 10 )... ... print time.time() - n0.9 - 1.124: 99

使用proxy 和未使用proxy 性能对比,开启ketama key allocation algorithm
mc = memcache.Client(["proxy"])... n = time.time()... for i in xrange(100):...     mc.set("%s" % i * 10,i)...     ... for i in xrange(100):...     mc.get("%s" %  i * 10 )... ... print time.time() - n0.946000099182 - 1.175: 99

通过开启一致性哈希测试2台cache key的分布并不均匀 ，需要增加更多的memcache节点。