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Posted to oak-issues@jackrabbit.apache.org by "Michael Dürig (JIRA)" <ji...@apache.org> on 2016/10/18 08:39:58 UTC

[jira] [Assigned] (OAK-4923) Improve segment deserialization performance

     [ https://issues.apache.org/jira/browse/OAK-4923?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Dürig reassigned OAK-4923:
----------------------------------

    Assignee: Michael Dürig  (was: Francesco Mari)

> Improve segment deserialization performance
> -------------------------------------------
>
>                 Key: OAK-4923
>                 URL: https://issues.apache.org/jira/browse/OAK-4923
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar
>            Reporter: Francesco Mari
>            Assignee: Michael Dürig
>             Fix For: Segment Tar 0.0.16
>
>         Attachments: OAK-4923-01.patch, OAK-4923-02.patch
>
>
> The methods {{readReferencedSegments}} and {{readRecordNumberOffsets}} in {{Segment}} compute the returned data every time they are called. While this is a very clean implementation, this might force unexpected I/O operations, since the "buffer" the data is read from usually is a memory-mapped file.



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