在 Distributed locks with Redis – Redis - Retry on failure 中，它说： When a client is unable to acquire the lock, it should try again after a random delay in order to try to desynchronize multiple clients trying to acquire the lock for the same resource at the same time (this may result in a split brain condition where nobody wins). Also the faster a client tries to acquire the lock in the majority of Redis instances, the smaller the window for a split brain condition (and the need for a retry), so ideally the client should try to send the SET commands to the N instances at the same time using multiplexing.
我的疑问 “this may result in a split brain condition where nobody wins”，究竟是什么会造成 split brain condition 呢？ “Also the faster a client tries to acquire the lock in the majority of Redis instances, the smaller the window for a split brain condition (and the need for a retry)”，为什么 client 越快尝试获取，split brain condition 发生的机率就越小呢？ “so ideally the client should try to send the SET commands to the N instances at the same time using multiplexing”， Distributed locks with Redis – Redis - The Redlock algorithm 不是说“It tries to acquire the lock in all the N instances sequentially”，为什么这里就变成了“at the same time”？