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Date: Tue, 12 Sep 2017 06:41:00 +0000 (UTC)
From: "Jaydeepkumar Chovatia (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.13101533.1505192574000.88097.1505198460087@Atlassian.JIRA>
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Subject: [jira] [Comment Edited] (CASSANDRA-13862) Optimize Paxos prepare
 and propose stage for local requests
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archived-at: Tue, 12 Sep 2017 06:41:05 -0000


    [ https://issues.apache.org/jira/browse/CASSANDRA-13862?page=3Dcom.atla=
ssian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=
=3D16162572#comment-16162572 ]=20

Jaydeepkumar Chovatia edited comment on CASSANDRA-13862 at 9/12/17 6:40 AM:
---------------------------------------------------------------------------=
-

Please find patch details here:

||Branch||uTest||
|[3.0 | https://github.com/apache/cassandra/compare/trunk...jaydeepkumar198=
4:13862-3.0]|[circleci |https://circleci.com/gh/jaydeepkumar1984/cassandra/=
14]|
|[trunk|https://github.com/apache/cassandra/compare/trunk...jaydeepkumar198=
4:13862-trunk]|[circleci |https://circleci.com/gh/jaydeepkumar1984/cassandr=
a/13]|


was (Author: chovatia.jaydeep@gmail.com):
Please find patch details here:

||Branch||uTest||
|[3.0 | https://github.com/apache/cassandra/compare/trunk...jaydeepkumar198=
4:13862-3.0]|[https://circleci.com/gh/jaydeepkumar1984/cassandra/14]|
|[trunk|https://github.com/apache/cassandra/compare/trunk...jaydeepkumar198=
4:13862-trunk]|[https://circleci.com/gh/jaydeepkumar1984/cassandra/13]|


> Optimize Paxos prepare and propose stage for local requests=20
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-13862
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1386=
2
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Streaming and Messaging
>            Reporter: Jaydeepkumar Chovatia
>            Priority: Minor
>             Fix For: 3.0.15, 4.0
>
>
> Currently Paxos prepare and propose messages always go through entire Mes=
sagingService stack in Cassandra even if request is to be served locally, w=
e can enhance and make local requests severed w/o involving MessagingServic=
e. Similar things are done at may [other places | https://github.com/apache=
/cassandra/blob/cassandra-3.0/src/java/org/apache/cassandra/service/Storage=
Proxy.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 Cassan=
dra 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
> =E2=80=A6                                                                =
                                                                           =
       REQUEST_RESPONSE message received from /A.B.C.D [MessagingService-In=
coming-/A.B.C.D] | 2017-09-11 21:55:18.976000 |  A.B.C.D |          20270
> =E2=80=A6                                                                =
                                                                           =
                                     Processing response from /A.B.C.D [Sha=
redPool-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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