我保证会按顺序执行对Redis的请求吗？

Question

所有。我写了一个数据项给Redis。然后，我从Redis中读取数据项。

由于可能有多个服务器接受这些Redis请求并满足它们，如果我在发出读取请求之前1 ms发出写入请求（假设它们都是由同一个进程完成的）我保证读取请求不会先被处理，我得到一个回复​​，例如＆＃34;该数据项目不存在＆＃34;？

Answer 1

Assuming that the commands are being issued in sequence, you can assume that they will be atomic and single-threaded operations. Read more about this in this stackoverflow answer.

The above is True for a single Redis server, and not guaranteed for a Cluster behavior (thanks @mwp). In that situation, I'd recommend adding a check at the client level. If key doesn't exist when Redis makes its GET call, by default a nil value is returned.

Last note: depending on your implementation you may want to look into storing your redis items in a list, LPUSH-ing the write requests and BRPOP-ing the out values so you would always be guaranteed a value exists...