mget in cluster mode

[joylannister]

In cluster mode, if the keys are not on the same shard, does it support mget? (github.com/go-redis/redis/v8 v8.11.0) thanks

[sueun-dev]

For github.com/go-redis/redis/v8 v8.11.0, no, not across different shards.

I checked the cluster client code for that version. It computes the slot from the first key and sends the whole MGET to a single node, so if the keys are in different slots Redis will return CROSSSLOT.

So for v8.11.0 your options are:

• keep the keys in the same slot with hash tags
• or group keys by slot and do separate MGET or GET calls

This seems to be improved in newer go-redis versions, but for the exact version you mentioned I would treat cross-shard MGET as unsupported.