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Etienne Adam commented on CASSANDRA-8340: ----------------------------------------- Marcus, we are having this issue migrating from STCS to DTCS, one big sstable was always compacting. > 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 > Attachments: 8340-v2.diff, 8340.diff > > > 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] ? -- This message was sent by Atlassian JIRA (v6.3.4#6332)