Keys are stored with _tmp and always gives Cache Miss when used in Multi Node Redis Cluster

Question

Keys are stored with _tmp and always gives Cache Miss when used in Multi Node Redis Cluster

SouradipPoddar opened this issue a year ago · comments

We have a setup of a redis cluster with 3 master and 3 replica nodes. We are using CHProxy as a caching layer for our application. Previously we had used the file system type of chproxy. Now we are moving to redis. We can see that all keys are being stored as _tmp. When hitting the same query again, CHProxy gives a cache miss and inserts another record with _tmp suffix.

Souradip Poddar · Answer 1 · Mon Mar 06 2023 18:08:46 GMT+0800 (China Standard Time)

Fix is part of this PR. #320
Awaiting review.

Christophe Kalenzaga · Answer 2 · Tue Mar 07 2023 02:09:12 GMT+0800 (China Standard Time)

can you give the configuration of your chproxy & the setup of your Redis? Because we're using the cache on redis (+ multiple users of chproxy) and it's the first time we see the issue you mentioned.

[edit]: I looked a the description of the PR (and not just the code) and I understand a bit more. See my comments in the PR.

Christophe Kalenzaga · Answer 3 · Tue Mar 07 2023 17:40:09 GMT+0800 (China Standard Time)

I'm closing the issue since the PR fixing it is merge.
It will be in the next release that should be available before the end of the month