How to constantly consume and output messages from a stream using redis cli?

Question

I tried the command below, however it only consume the last one message but what I want from the redis cli is to constantly consume and output messages on the screen while the publisher is continuously publishing messages.

XREAD BLOCK 0 STREAMS mystream $

score 0 · Answer 1 · answered Jul 18 '21 at 10:32

0

Regrettably, unlike the special modes for MONITOR and SUBSCRIBE, the redis-cli doesn't feature a "streaming" mode yet. Please feel free to propose the news feature by opening an issue at https://github.com/redis/redis/issues

answered Jul 18 '21 at 10:32

Itamar Haber

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Of course - just write a loop that does `XREAD` in your favorite programming language. – Itamar Haber Jul 20 '21 at 21:43
I feel like that will overload redis – user1870400 Jul 21 '21 at 01:03
lol - you'll need to work hard to overload Redis. Trust me, a single connection trying to read a stream one entry at a time isn't gonna do any harm, but feel free to test my claims :) – Itamar Haber Jul 21 '21 at 12:13
I would not read one at a time. I would try and read 50K entries if I can so I can get more throughput too. – user1870400 Jul 21 '21 at 12:16
Note that the `BLOCK` is release once there's a single message that can be delivered (i.e. `BLOCK n` + `COUNT m` will return one message). – Itamar Haber Jul 23 '21 at 18:50

How to constantly consume and output messages from a stream using redis cli?

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