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https://issues.apache.org/jira/browse/CASSANDRA-7978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14143893#comment-14143893
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Jason Brown commented on CASSANDRA-7978:
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bq. that is an ephemeral change
d'oh! yes, you are correct.
Then, I'm +1 on the patch. The only nit I would have (and it's rather trivial)
is to perhaps store a reference to an "override" CompressionParameters rather
than the whole CFMD (as live endpoints) in the updated CompressionParameters.
[~benedict] the reason why FileCacheService.invalidate() wouldn't work is that
FCS holds RAR/CRAR instances, and CRAR gets it's CompressionMetadata from a
CompressedPoolingSegmentedFile wrapper (derived from SegmentedFile), and CPSF
what SSTR holds onto for it's lifetime. Thus, CPSF never gets 'updated' or
recycled (via FCS) in the way that CRAR does, so calling
FileCacheService.invalidate() won't do the trick.
> CrcCheckChance should not be stored as part of an sstable
> ---------------------------------------------------------
>
> Key: CASSANDRA-7978
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7978
> Project: Cassandra
> Issue Type: Improvement
> Reporter: sankalp kohli
> Assignee: T Jake Luciani
> Priority: Minor
> Fix For: 2.0.11
>
> Attachments: 7978.txt, 7978v2.txt
>
>
> CrcCheckChance is stored with compression parameters in the sstable. The only
> way to change it is to do upgrade sstable. I don't see why it should not be a
> hot property.
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