Redis cluster mode pipeline operation

[Shushant Arora]

Hi

Does redis support pipeline in cluster mode.

I am using Jedis client and getting Moved exception, How does jedis client handle exact node of a key in cluster mode of pipeline, Does jedis client send all keys to one node and that node then distribute keys in cluster to appropriate node ?

[hva...@gmail.com]

Redis cluster nodes do not proxy commands to other nodes.  See the 6th paragraph of https://redis.io/topics/cluster-spec where it says:

Since cluster nodes are not able to proxy requests, clients may be redirected to other nodes using redirection errors -MOVED and -ASK.

In Redis Cluster, each master node and slave node only holds some of the keys.  If you send write/read commands for keys that belong to the node, you get answers because the node has the keys.  If you send write/read commands for keys that belong in other nodes, you get a Moved or Ask error, telling you the node does not have the key.

Command pipelining doesn't matter.  Pipelining is nothing more than whether you wait for a command's response before sending the next command (non-pipelined), or don't wait for the response (pipelined).  If you send a command for a key to a Redis Cluster node that doesn't have the key, you will get the Moved or Ask error for that command.

[Shushant Arora]

Ok..

If I use Redisson library does it provide cluster mode natively.

Can I set Hash key with specific fields in Redisson batch mode in cluster mode?

basically alternative of pipeline.hmget("key", fields);

RBatch rbatch = redisson.createBatch();

 rbatch.getMap(name, //how to get specific fields ??

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