Dikang Gu created CASSANDRA-12814:
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Summary: Batch read requests to same physical host
Key: CASSANDRA-12814
URL: https://issues.apache.org/jira/browse/CASSANDRA-12814
Project: Cassandra
Issue Type: New Feature
Reporter: Dikang Gu
We have couple use cases that are doing fanout read for their data, means one
single read request from client contains multiple keys which live on different
physical hosts. (I know it's not recommended way to access C*).
Right now, on the coordinator, it will issue separate read commands even though
they will go to the same physical host, which I think is causing a lot of
overheads.
I think it's valuable to provide a new read command, that coordinator can batch
the reads to one datanode, and send to it in one message, and datanode will
return the results for all keys belong to it.
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