[CASSANDRA-10962] Cassandra should not create snapshot at restart for compactions_in_progress

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 2.2.7
• Component/s: Local/Startup and Shutdown

Environment

Ubuntu 14.04.3 LTS

• Severity: Low
• Since Version: 2.0.0
• Assignee: Alex Petrov
• Reporter: FACORAT

Authors

Alex Petrov

Reviewers

Joel Knighton

• Created: 04/Jan/16 13:00
• Updated: 16/Apr/19 09:30
• Resolved: 05/May/16 22:05

Description

If auto_snapshot is set to true in cassandra.yaml, each time you restart Cassandra, a snapshot is created for system.compactions_in_progress as the table is truncated at cassandra start.

However as datas in this table are temporary, Cassandra should not create snapshot for this table (or maybe even for system.* tables). This will be coherent with the fact that "nodetool listsnapshots" doesn't even list this table.

Exemple:

$ nodetool listsnapshots | grep compactions
$ ls -lh system/compactions_in_progress-55080ab05d9c388690a4acb25fe1f77b/snapshots/
total 16K
drwxr-xr-x 2 cassandra cassandra 4.0K Nov 30 13:12 1448885530280-compactions_in_progress
drwxr-xr-x 2 cassandra cassandra 4.0K Dec  7 15:36 1449498977181-compactions_in_progress
drwxr-xr-x 2 cassandra cassandra 4.0K Dec 14 18:20 1450113621506-compactions_in_progress
drwxr-xr-x 2 cassandra cassandra 4.0K Jan  4 12:53 1451908396364-compactions_in_progress