redis - Redis 中的 BLPOP、BRPOP 和 BRPOPLPUSH 是什么？

Question

正在尝试研究 Redis 的指标并得出这些术语。对他们一无所知。有人可以用外行的话解释这些术语吗？

Answer 1

根据 REDIS Commands Documentation :

BLPOP

BLPOP is a blocking list pop primitive. It is the blocking version of LPOP because it blocks the connection when there are no elements to pop from any of the given lists. An element is popped from the head of the first list that is non-empty, with the given keys being checked in the order that they are given.

In Brief : See BLPOP

BRPOP

BRPOP is a blocking list pop primitive. It is the blocking version of RPOP because it blocks the connection when there are no elements to pop from any of the given lists. An element is popped from the tail of the first list that is non-empty, with the given keys being checked in the order that they are given.

In Brief : See BRPOP

BRPOPLPUSH

BRPOPLPUSH is the blocking variant of RPOPLPUSH. When source contains elements, this command behaves exactly like RPOPLPUSH. When used inside a MULTI/EXEC block, this command behaves exactly like RPOPLPUSH. When source is empty, Redis will block the connection until another client pushes to it or until timeout is reached. A timeout of zero can be used to block indefinitely.

In Brief : See BRPOPLPUSH