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From "Jukka Zitting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-2699) Improve read/write concurrency
Date Tue, 05 Oct 2010 09:26:33 GMT

    [ https://issues.apache.org/jira/browse/JCR-2699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12917914#action_12917914
] 

Jukka Zitting commented on JCR-2699:
------------------------------------

I'm a bit worried about the potentially adverse effects of growing the number of SystemSessions
per workspace. A better approach could be to refactor the ACL handling to use the ItemValidator.performRelaxed()
mechanism from JCR-2714 instead of the SystemSession. I'd also take the ACL discussion to
JCR-2573 where a more general effort to improve ACL evaluation performance is taking place.

> Improve read/write concurrency
> ------------------------------
>
>                 Key: JCR-2699
>                 URL: https://issues.apache.org/jira/browse/JCR-2699
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>         Attachments: AccessControlProviderHolder.java, ConcurrentReadTest.png, DynamicSecurityManager-JCR2699.patch
>
>
> I'd like to set up a few performance tests to help identify our worst bottlenecks for
various kinds of concurrent read-only and read-write access patterns.
> Once identified, I'm hoping to fix at least some of those bottlenecks.

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