Gearmand 是 Gearman 的作业服务器组件，Gearman是一个分发任务的程序框架，可以用在各种场合，与Hadoop相 比，Gearman更偏向于任务分发功能。它的 任务分布非常 简单，简单得可以只需要用脚本即可完成。Gearman最初用于LiveJournal的图片resize功能，由于图片resize需要消耗大量计算资 源，因此需要调度到后端多台服务器执行，完成任务之后返回前端再呈现到界面。
Gearmand 1.1.11 改进记录包括：
Workers that return a bad gearman_return_t will be counted as an error by the server and not a final (i.e. they will be retried).
A possible bug has been fixed where the server would over count the number of NOOP sent if NOOP messages did not get sent.
gearman_job_use_client() has been added.
Compile time has been improved.
A fix for NOOP failure (bad worker causes early exit of loop).
A fix for PostgreSQL (use INFORMATION_SCHEMA).
gearman_client_has_active_tasks() has been added so that you can see if a client has active tasks that it is working on
官方首页：https://launchpad.net/gearmand/
免费下载：https://launchpad.net/gearmand/+download
来自:开源中国社区
