如何做个合理的队列
准备做个队列，来处理 邮件发送，短信下发，站内信等。如何做呢？
准备用memcacheq ，memcacheq只是存各应用的操作id么？比如待发邮件存到一个表，memcacheq里只是存了这条记录的id。出队列时再从数据库查出来做下发。
也就是只是利用它的并发特性？而不是把某个业务的数据都存在里面？
------解决方案--------------------
都可以。但是都有自己的缺点，可以根据具体的内容分而治之
------解决方案--------------------
可以用gearman 或者redis 来做，可以做的方法很多。只要队列的插入和读取都是有序的，原子的。就是合理的。
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