[jira] [Comment Edited] (LUCENE-2446) Add checksums to Lucene segment files

["Bert Sanders (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-2446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13955103#comment-13955103 ] 

Bert Sanders edited comment on LUCENE-2446 at 3/31/14 11:20 AM:
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Is CRC32 intrinsic available and the same on all relevant platforms ?
(I assume it is CRC32C version of Intel)

If not, what happens ? Does it still work ? Does it need to be cross-platform-compatible ?
Could it be a concern for performance-related issue ?


was (Author: mrbsd):
Is CRC32 intrinsic available and the same on all relevant platforms ?
(I assume it is CRC32C version of Intel)

If not, what happens ? Does it still work ? 
Could it be a concern for performance-related issue ?

> Add checksums to Lucene segment files
> -------------------------------------
>
>                 Key: LUCENE-2446
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2446
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/index
>            Reporter: Lance Norskog
>              Labels: checksum
>         Attachments: LUCENE-2446.patch
>
>
> It would be useful for the different files in a Lucene index to include checksums. This would make it easy to spot corruption while copying index files around; the various cloud efforts assume many more data-copying operations than older single-index implementations.
> This feature might be much easier to implement if all index files are created in a sequential fashion. This issue therefore depends on [LUCENE-2373].



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