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https://issues.apache.org/jira/browse/CASSANDRA-3456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13144295#comment-13144295
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Jonathan Ellis commented on CASSANDRA-3456:
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I'm a little torn about adding another component -- leveled compaction will eat
up fds really quickly and adding more components will make that worse. Putting
it in the metadata/statistics component is *almost* as user friendly (scrub can
check it, or we can provide a standalone sstablesha tool to extract it). What
do you think?
> Automatically create SHA1 of new sstables
> -----------------------------------------
>
> Key: CASSANDRA-3456
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3456
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Sylvain Lebresne
> Assignee: Sylvain Lebresne
> Priority: Minor
>
> Compressed sstables have block checksums which is great but non-compressed
> sstables don't for technical/compatibility reasons that I'm not criticizing.
> It's a bit annoying because when someone comes up with a corrupted file, we
> really have nothing to help discarding it as bitrot or not. However, it would
> be fairly trivial/cheap to compute the SHA1 (or other) of whole sstables when
> creating them. And if it's a new, separate, sstable component, we don't even
> have to implement anything to check the hash. It would only be there to
> (manually) check for bitrot when corruption is suspected by the user, or to
> say check the integrity of backups.
> I'm absolutely not pretending that it's a perfect solution, and for
> compressed sstables the block checksums are clearly more fine grained, but
> it's easy to add and could prove useful for non compressed files.
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