[CASSANDRA-3406] Create a nodetool upgrade_sstables to avoid using scrubs for tasks it wasn't intended to.

• Type: New Feature
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 1.0.4
• Assignee: Sylvain Lebresne
• Reporter: Sylvain Lebresne

Authors

Sylvain Lebresne

Reviewers

Jonathan Ellis

• Created: 26/Oct/11 16:39
• Updated: 16/Apr/19 09:32
• Resolved: 17/Nov/11 08:57

Description

Scrub was intended to check a data file is not corrupted and to try to correct some form of corruption and discard the data when it can't repair. But we are now using it also for:

• major upgrade, to have sstable in the new data format for streaming sake (that one could be "fixed" independently by supporting old format during streaming)
• to force the compaction of existing sstables after changing the compression algorithm

We should probably provide a separate tool/command for those two last tasks since:

• we could have a better name, like upgrade_sstables or rewrite_sstables for that operation
• we could avoid the automatic snapshot that scrub does (and is not expected by users for those operations)
• make it slightly quicker/simpler by avoiding the corruption detection code