Documented steps

Append to the tail: `RPUSH mylist "world"` (creates the list if missing; returns the new list length).
Prepend to the head: `LPUSH mylist "hello"`.
Read a range: `LRANGE mylist 0 -1` returns all elements head-to-tail; `LRANGE mylist 0 2` first three.
Pop from head: `LPOP mylist`; pop from tail: `RPOP mylist`. Both return the removed element.
Push multiple in one call: `RPUSH mylist a b c` - they are appended in order.
Ordering gotcha: `LPUSH mylist a b c` results in head=`c` (leftmost becomes head).
Length: `LLEN mylist`.
python: `r.rpush('q','x')`, `r.lrange('q',0,-1)`, `r.lpop('q')`.

Known gotchas

LPUSH with multiple args reverses insertion: `LPUSH l a b c` puts c at head, b, a - verify ordering if it matters.
Pushing to a key holding a non-list value errors.
For a FIFO queue where producers RPUSH and consumers LPOP, if a consumer crashes after LPOP the element is lost - use the blocking reliable variant (BLPOP + BRPOPLPUSH) for at-least-once delivery.
The return value of LPUSH/RPUSH is the new list length - use it instead of a separate LLEN to track size.

redis · 4 steps · unrated

Use Redis lists as a queue with LPUSH/RPUSH/LRANGE and pop operations

redis.io · 8 steps · unrated

Build a reliable blocking Redis queue with BLPOP/BRPOP and BRPOPLPUSH

redis.io · 7 steps · unrated

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Use Redis lists as a queue with LPUSH/RPUSH/LRANGE and pop operations

Documented steps

Known gotchas

Related routes

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