Throttle migration replay
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Key: CASSANDRA-2714
URL: https://issues.apache.org/jira/browse/CASSANDRA-2714
Project: Cassandra
Issue Type: Improvement
Affects Versions: 0.7.0
Reporter: Jonathan Ellis
Assignee: Jonathan Ellis
Priority: Minor
Fix For: 0.7.7
As reported on the mailing list,
{noformat}
- 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).
{noformat}
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.
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