[CASSANDRA-7346] Modify reconcile logic to always pick a tombstone over a counter cell

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 2.1 rc2
• Assignee: Aleksey Yeschenko
• Reporter: Richard Low

Authors

Aleksey Yeschenko

Reviewers

Sylvain Lebresne

• Created: 03/Jun/14 13:53
• Updated: 16/Apr/19 09:31
• Resolved: 19/Jun/14 19:02

Description

For counters, timestamps are automatically computed to be milliseconds since the epoch. For everything else, when not specified manually, they are microseconds since the epoch. This means if you delete a counter row, subsequent updates are lost unexpectedly.

I know that deleting counters is not recommended, but that's only because deletes and incs don't commute. If you know you have stopped incs, then delete, then start again (with some external synchronization) then deleting is fine.

Issue Links

• is related to: CASSANDRA-9810 Lift some counters limitations in C* 3.X
• is superceded by: CASSANDRA-6506 counters++ split counter context shards into separate cells