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[转]程序员如何 Get 分布式锁的正确姿势
在很多互联网产品应用中，有些场景需要加锁处理，比如秒杀、全局递增ID、楼层生成等等，大部分的解决方案是基于DB实现的，Redis也是较为常见的方案之一。 Redis为单进程单线程模式，采用队列模式将并发访问变成串行访问，且多客户端对Redis的连接并不存在竞争关系。其次Redis提供一些命令SETNX，GETSET，可以方便实现分布式锁机制。
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