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https://issues.apache.org/jira/browse/LUCENE-2446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13955111#comment-13955111
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Robert Muir commented on LUCENE-2446:
-------------------------------------
java.util.zip.CRC32 has been used by lucene for the segments_N for quite some
time.
This just applies it to other files. And while is nice that it is 3x faster in
java 8, it is still 1GB/second with java 7 on my computer.
By the way, the instruction used in java8 is not CRC32C. it is PCLMULQDQ. If
they broke this, it would be a big bug in java :)
> 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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