Maohua created CASSANDRA-8078:
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Summary: Add a detailed compaction history table to show file
lineage
Key: CASSANDRA-8078
URL: https://issues.apache.org/jira/browse/CASSANDRA-8078
Project: Cassandra
Issue Type: Improvement
Components: Core
Environment: Cassandra on any platform
Reporter: Maohua
Fix For: 2.1.0
Currently system.compaction_history only contains summary information about a
compaction, which is useful if users only care about when the compaction occurs
and the benefits generated by the compaction. However, it does not show the
detailed src->dst SSTable mappings. For example, it does not show which SSTable
is created or deleted as a result of compaction. As a result, when users want
to backup or archive data files, they may end up backing-up different SSTables
that represent exactly the same user data.
It will be great if there is a system.compaction_detailed_history table that
remembers the detailed lineage of SSTables so the backup task does not have to
figure out the duplicate data on its own.
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