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From "Thomas Mueller (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1517) Global datastore and namespace index cause problems when migrating workspaces
Date Wed, 09 Dec 2009 14:19:18 GMT

    [ https://issues.apache.org/jira/browse/JCR-1517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12788102#action_12788102
] 

Thomas Mueller commented on JCR-1517:
-------------------------------------

I'm wondering if it still makes sense to solve this, or if it's better to use a the repository
migration as documented in http://wiki.apache.org/jackrabbit/BackupAndMigration

> Global datastore and namespace index cause problems when migrating workspaces
> -----------------------------------------------------------------------------
>
>                 Key: JCR-1517
>                 URL: https://issues.apache.org/jira/browse/JCR-1517
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Tobias Bocanegra
>            Assignee: Tobias Bocanegra
>         Attachments: jcr-1517.r644105.patch
>
>
> Issue JCR-669 introduced a global namespace index. this is used by some persistence managers
in order to
> keep the serialization of names small (fewer bytes).
> unfortunately this forms a problem when a workspace needs to be migrated to another repository
with other namespace indexes. so an easy migration is not possible unless you export/import
the entire workspace using system view (which is almost impossible for huge workspaces).
> another potential problem is cause by the global data store, since all workspaces share
the same.
> so when migrating a workspace, you would need to transfer all respective records in the
datastore to the target repository.
> where the datastore problem can be solved by copying the respective items, the namespace
indexes are a bigger problem, since the serialized items need to be adjusted.
> suggest to alter the bundle pm to use the 'name index' for the namespaces as well.

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