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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8692) Coalesce intra-cluster network messages
Date Fri, 30 Jan 2015 21:23:35 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14299238#comment-14299238
] 

T Jake Luciani commented on CASSANDRA-8692:
-------------------------------------------

I also ran a test on cstar and see an improvement

http://cstar.datastax.com/graph?stats=bd23e138-a8bc-11e4-acb3-42010af0688f&metric=op_rate&operation=1_user&smoothing=1&show_aggregates=true&xmin=0&xmax=172.59&ymin=0&ymax=229631.6


nagle is this patch (sorry for the bad label)
nagle2 is 2.1 head with nagle on.

It shows this is an improvement over just enabling nagle.





> Coalesce intra-cluster network messages
> ---------------------------------------
>
>                 Key: CASSANDRA-8692
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8692
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Ariel Weisberg
>            Assignee: Ariel Weisberg
>         Attachments: batching-benchmark.png
>
>
> While researching CASSANDRA-8457 we found that it is effective and can be done without
introducing additional latency at low concurrency/throughput.
> The patch from that was used and found to be useful in a real life scenario so I propose
we implement this in 2.1 in addition to 3.0.
> The change set is a single file and is small enough to be reviewable.



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