Automatically create SHA1 of new sstables
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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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