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Posted to commits@cassandra.apache.org by "Jaydeepkumar Chovatia (JIRA)" <ji...@apache.org> on 2017/09/12 05:03:01 UTC
[jira] [Created] (CASSANDRA-13862) Optimize Paxos prepare and
propose stage for local requests
Jaydeepkumar Chovatia created CASSANDRA-13862:
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Summary: Optimize Paxos prepare and propose stage for local requests
Key: CASSANDRA-13862
URL: https://issues.apache.org/jira/browse/CASSANDRA-13862
Project: Cassandra
Issue Type: Improvement
Components: Streaming and Messaging
Reporter: Jaydeepkumar Chovatia
Priority: Minor
Fix For: 3.0.15
Currently Paxos prepare and propose messages always go through entire MessagingService stack in Cassandra even if request is to be served locally, we can enhance and make local requests severed w/o involving MessagingService. Similar things are done at may [other places | https://github.com/apache/cassandra/blob/cassandra-3.0/src/java/org/apache/cassandra/service/StorageProxy.java#L1244] in Cassandra which skips MessagingService stage for local requests.
This is what it looks like currently if we have tracing on and run Cassandra light weight transaction.
{{
… Sending PAXOS_PREPARE message to /A.B.C.D [MessagingService-Outgoing-/A.B.C.D] | 2017-09-11 21:55:18.971000 | A.B.C.D | 15045
… REQUEST_RESPONSE message received from /A.B.C.D [MessagingService-Incoming-/A.B.C.D] | 2017-09-11 21:55:18.976000 | A.B.C.D | 20270
… Processing response from /A.B.C.D [SharedPool-Worker-4] | 2017-09-11 21:55:18.976000 | A.B.C.D | 20372
…
}}
Same thing applies for Propose stage as well.
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