SORT command is always considered as Intent.WRITE

[SergeyKulagin]

Hi guys,

I was playing with Lettuce (6.1.0.M1) and Redis in a master-replica setup.
I noticed that Sort command always goes to the master node in spite of REPLICA_PREFERRED configuration.
Well, I see that Sort is not considered as ReadOnlyCommands which is perfectly reasonable.
But what is I'm planning to use sort command a lot without writing.
Can I somehow workaround this restriction and allow the driver to make reads from the replicas (as it was readonly command)?

Thanks in advance,
Sergey

[mp911de]

SORT is categorized as write command, see

https://github.com/redis/redis/blob/efccd6353bacec9addc7278292fd8c3108d116e4/src/server.c#L779-L781

There's currently no workaround possible.

[SergeyKulagin]

Okay, thanks for the quick answer!
I'm just wandering if I use it without STORE is there any chance that it performs some write in the background and should be executed agains master only... But anyway, the statement is clear. Thanks!

[mp911de]

Redis lately is heading to split commands and a SORTSTORE (as in SUNIONSTORE) would be probably a neat extension that would solve your issue. Check out the Redis issue tracker at https://github.com/redis/redis/.

[SergeyKulagin]

Thanks for the hint!