sankalp kohli created CASSANDRA-4548:
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Summary: Mutation response(WriteResponse.java) could be smaller
and not contain keyspace and key
Key: CASSANDRA-4548
URL: https://issues.apache.org/jira/browse/CASSANDRA-4548
Project: Cassandra
Issue Type: Improvement
Components: Core
Affects Versions: 1.2
Reporter: sankalp kohli
In the mutation response, WriteResponse.java object is send back to the
co-ordinator. This object has keyspace and key in it which is not required. It
is not being used at the co-ordiantor.
This wastes IO specially in case of WAN links between DC. Also since response
from each node in multi-DC deployments goes back to the co-ordinator in another
DC makes it even worse.
It also becomes worse if the the keyspace and key are of large size and the
data is small. In that case, a node which is not the co-ordinator and purely
receiving mutations, the outbound n/w bandwidth could be half of incoming
bandwidth.
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