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Date: Tue, 12 Sep 2017 22:47:00 +0000 (UTC)
From: "Jeff Jirsa (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
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Subject: [jira] [Updated] (CASSANDRA-13862) Optimize Paxos prepare and
 propose stage for local requests
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archived-at: Tue, 12 Sep 2017 22:47:04 -0000


     [ https://issues.apache.org/jira/browse/CASSANDRA-13862?page=3Dcom.atl=
assian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jeff Jirsa updated CASSANDRA-13862:
-----------------------------------
    Fix Version/s:     (was: 3.0.15)
                       (was: 4.0)
                   4.x
                   3.11.x
                   3.0.x

> 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.x, 3.11.x, 4.x
>
>
> 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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