[CASSANDRA-4905] Repair should exclude gcable tombstones from merkle-tree computation

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 1.2.0 beta 3
• Assignee: Sylvain Lebresne
• Reporter: Christian Spriegel

Authors

Sylvain Lebresne

Reviewers

Jonathan Ellis

• Created: 03/Nov/12 20:56
• Updated: 16/Apr/19 09:32
• Resolved: 08/Nov/12 15:01

Description

Currently gcable tombstones get repaired if some replicas compacted already, but some are not compacted.

This could be avoided by ignoring all gcable tombstones during merkle tree calculation.

This was discussed with Sylvain on the mailing list:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/repair-compaction-and-tombstone-rows-td7583481.html

Issue Links

• is related to: CASSANDRA-2698 Instrument repair to be able to assess it's efficiency (precision)
• is related to: CASSANDRA-4932 Agree on a gcbefore/expirebefore value for all replica during validation compaction
• is related to: CASSANDRA-5398 Remove localTimestamp from merkle-tree calculation (for tombstones)
• relates to: CASSANDRA-4917 Optimize tombstone creation for ExpiringColumns