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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-5422) Binary protocol sanity check
Date Mon, 20 May 2013 02:05:16 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661706#comment-13661706
] 

Jonathan Ellis edited comment on CASSANDRA-5422 at 5/20/13 2:04 AM:
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It looks like I was wrong; they do not actually require copyright assignment, just the grant
of a license covered in the CLA:

{quote}
Grant of Copyright License. Subject to the terms and conditions of this Agreement, You hereby
grant to the Foundation and to recipients of software distributed by the Foundation a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce,
prepare derivative works of, publicly display, publicly perform, sublicense, and distribute
Your Contributions and such derivative works.
{quote}
                
      was (Author: jbellis):
    It sounds like they do not actually require copyright assignment, just the grant of a
license covered in the CLA:

{quote}
Grant of Copyright License. Subject to the terms and conditions of this Agreement, You hereby
grant to the Foundation and to recipients of software distributed by the Foundation a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce,
prepare derivative works of, publicly display, publicly perform, sublicense, and distribute
Your Contributions and such derivative works.
{quote}
                  
> Binary protocol sanity check
> ----------------------------
>
>                 Key: CASSANDRA-5422
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5422
>             Project: Cassandra
>          Issue Type: Bug
>          Components: API
>            Reporter: Jonathan Ellis
>            Assignee: Daniel Norberg
>         Attachments: 5422-test.txt, ExecuteMessage Profiling - Call Tree.png, ExecuteMessage
Profiling - Hot Spots.png
>
>
> With MutationStatement.execute turned into a no-op, I only get about 33k insert_prepared
ops/s on my laptop.  That is: this is an upper bound for our performance if Cassandra were
infinitely fast, limited by netty handling the protocol + connections.
> This is up from about 13k/s with MS.execute running normally.
> ~40% overhead from netty seems awfully high to me, especially for insert_prepared where
the return value is tiny.  (I also used 4-byte column values to minimize that part as well.)

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