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From "Christian Stocker (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (JCR-3004) Check if a DAV-Request has a Label in the header, before checking if it's version-controlled
Date Thu, 21 Jul 2011 08:32:58 GMT

    [ https://issues.apache.org/jira/browse/JCR-3004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13068859#comment-13068859

Christian Stocker commented on JCR-3004:

Guten Tag,

Ich bin bis am 23. Juli 2011 abwesend und werde meine Emails nicht lesen.
Bitte senden Sie in dringenden Fällen eine E-Mail an contact@liip.ch.

Besten Dank für Ihr Verständnis.

Christian Stocker


I'm off until 23 July and do not read my emails.
In urgent cases, please send an email to contact@liip.ch

Best Wishes

Christian Stocker

Liip AG  //  Feldstrasse 133 //  CH-8004 Zurich
Tel +41 43 500 39 81 // Mobile +41 76 561 88 60
www.liip.ch // blog.liip.ch // GnuPG 0x0748D5FE

> Check if a DAV-Request has a Label in the header, before checking if it's version-controlled
> --------------------------------------------------------------------------------------------
>                 Key: JCR-3004
>                 URL: https://issues.apache.org/jira/browse/JCR-3004
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-jcr-server
>    Affects Versions: 2.2.7, 2.3.0
>            Reporter: Christian Stocker
>            Assignee: angela
>             Fix For: 2.3.0
>         Attachments: patch_commit_85c91801358a.patch
> When looking at our MySQL logs, I realized that jackrabbit on each DAV Request calls
the VERSION table every time I get a new node (which is not cached yet), even if I only do
a simple getNode. 
> As a versioning table can get pretty large, this may have a performance impact.
> I found out, that DavResourceFactoryImpl checks, if a node is versioned to decide, if
we have to check for the Label header to later check out another version for the GET request.
I re-ordered those checks now so that it first checks, if there's an http Label-header and
only then checks, if the node is versioned. The check for a Label header should be much faster
than checking a DB, if it's versioned (and scale much better, too)

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