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https://issues.apache.org/jira/browse/CASSANDRA-9211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Björn Hegerfors updated CASSANDRA-9211:
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Priority: Minor (was: Major)
> Keep history of SSTable metadata
> --------------------------------
>
> Key: CASSANDRA-9211
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9211
> Project: Cassandra
> Issue Type: Wish
> Reporter: Björn Hegerfors
> Priority: Minor
>
> Similar to the request in CASSANDRA-8078, I'm interested in SSTables'
> lineage. Specifically, I want to visualize the behaviors of compaction
> strategies based on real data. For example, for STCS I might want to generate
> something like this image:
> http://www.datastax.com/wp-content/uploads/2011/10/size-tiered-1.png. For LCS
> and DTCS, other properties than size are interesting.
> As Marcus responded in CASSANDRA-8078, there is already tracking of ancestors
> in the SSTable metadata. But as far as I know, the metadata gets garbage
> collected along with the SSTable itself. So what I propose is to persist
> metadata in a system table. Maybe some, maybe all metadata. Like the
> compaction_history table, this should have a default TTL of something like
> one week or just one day. But users can freely modify/remove the TTL.
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