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From "Vinod Holani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-8449) LastRev check/fix in DocumentNodeStore MBean
Date Fri, 05 Jul 2019 06:42:00 GMT

    [ https://issues.apache.org/jira/browse/OAK-8449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16879003#comment-16879003
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Vinod Holani commented on OAK-8449:
-----------------------------------

Thanks [~mreutegg] for the suggestions, could you please have a look at updated patch.

> LastRev check/fix in DocumentNodeStore MBean
> --------------------------------------------
>
>                 Key: OAK-8449
>                 URL: https://issues.apache.org/jira/browse/OAK-8449
>             Project: Jackrabbit Oak
>          Issue Type: Task
>          Components: documentmk
>            Reporter: Vinod Holani
>            Assignee: Marcel Reutegger
>            Priority: Minor
>         Attachments: OAK-8449_1.patch, OAK-8449_2.patch
>
>
> There is existing tooling to check _lastRev consistency of documents in the DocumentStore.
Some of the tooling is limited to MongoDB because it is implemented as utility functions for
the MongoDB shell ([oak-mongo.js|https://jackrabbit.apache.org/oak/docs/oak-mongo-js/oak.html]).
The oak-run [recovery|https://github.com/apache/jackrabbit-oak/tree/trunk/oak-run#recovery-mode] command
was initially only available on MongoDB as well, but recently RDB support was added (OAK-8004).
The recovery command however has some drawbacks. It scans the entire nodes collection, which
can be a rather expensive operation and when started in read-write mode.
> This improvement is about adding _lastRev check and fix functionality to the DocumentNodeStore
MBean. The scope of the check and fix would be limited to some path(s) in order to keep the
runtime of the operation low.



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