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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-5578) Stored fields might accumulate checksums on merges
Date Tue, 08 Apr 2014 14:28:51 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-5578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13963032#comment-13963032
] 

Michael McCandless commented on LUCENE-5578:
--------------------------------------------

+1, looks great!  Thanks Adrien.

> Stored fields might accumulate checksums on merges
> --------------------------------------------------
>
>                 Key: LUCENE-5578
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5578
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Blocker
>             Fix For: 4.8
>
>         Attachments: LUCENE-5578.patch, LUCENE-5578.patch, LUCENE-5578.patch, LUCENE-5578.patch
>
>
> The bulk merge operation of our stored fields format is optimized in order to avoid decompressing
data when not needed. In order to know the offset of the end of the current block, it either
consults the stored fields index, or uses {{fieldsStream.length()}} for the last chunk.
> However, we just added checksums at the end of index files, so it might currently copy
the current checksum in addition to the last chunk, and then write a new checksum.



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