Marcus Eriksson created CASSANDRA-8340:
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Summary: Use sstable min timestamp when deciding if an sstable
should be included in DTCS compactions
Key: CASSANDRA-8340
URL: https://issues.apache.org/jira/browse/CASSANDRA-8340
Project: Cassandra
Issue Type: Improvement
Reporter: Marcus Eriksson
Priority: Minor
Currently we check how old the newest data (max timestamp) in an sstable is
when we check if it should be compacted.
If we instead switch to using min timestamp for this we have a pretty clean
migration path from STCS/LCS to DTCS.
My thinking is that before migrating, the user does a major compaction, which
creates a huge sstable containing all data, with min timestamp very far back in
time, then switching to DTCS, we will have a big sstable that we never compact
(ie, min timestamp of this big sstable is before max_sstable_age_days), and all
newer data will be after that, and that new data will be properly compacted
WDYT [~Bj0rn] ?
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