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

It features:

• keeps connections to memcached servers
• supports following memcached commands
  1. get gets
  2. delete
  3. incr decr
  4. add set replace prepend append
  5. cas
• event-driven by using libevent library
• supports ketama algorithm
• backup servers farm
• unix domain socket

Usage:

-h this message -u uid -g gid -p port, default is 11211. (0 to disable tcp support) -s ip:port, set memcached server ip and port -b ip:port, set backup memcached server ip and port -l ip, local bind ip address, default is 0.0.0.0 -n number, set max connections, default is 4096 -D do not go to background -k use ketama key allocation algorithm -f file, unix socket path to listen on. default is off -i number, max keep alive connections for one memcached server, default is 20 -v verbose

Changelog:

2010/4/14: memcached agent 0.6 1. add connection keepalive handler 1. bug fix, more robust, more debug messages

Examples:

magent -s 10.1.2.1 -s 10.1.2.2:11211 -b 10.1.2.3:14000 -v

Notes:

1. current magent's speed is about 80% of memcached's. finding way to speed it up(not good)
2. adding backup server does no harm to magent's performance. (good)
3. magent's cpu usage is less than memcached's and has very little memory usage. (good)