[CASSANDRA-2714] Throttle migration replay

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 0.7.7, 0.8.1
• Assignee: Jonathan Ellis
• Reporter: Jonathan Ellis

Authors

Jonathan Ellis

Reviewers

Gary Dusbabek

• Created: 26/May/11 20:01
• Updated: 16/Apr/19 09:32
• Resolved: 26/May/11 20:49

Description

As reported on the mailing list,

- I have a lot of schema updates (there are 2067 rows in the system.Schema CF).
- The live node loads migrations 1-1000, and sends them to the recovering node (Migration.getLocalMigrations())
- Soon afterwards, the live node checks the schema version on the recovering node and finds it has moved by a little - say it has applied the first 3 migrations. It then loads migrations 3-1003, and sends them to the node.
- This process is repeated very quickly (sends migrations 6-1006, 9-1009, etc).

The source of the problem is that MigrationManager.onChange will send out a full (up to 1000 migrations) replay, every time the target's schema version changes.