[CASSANDRA-15133] Node restart causes unnecessary token metadata update

• Type: Improvement
• Status: Patch Available
• Priority: Normal
• Resolution: Unresolved
• Component/s: Cluster/Gossip, Cluster/Membership
• Change Category: Performance
• Complexity: Low Hanging Fruit
• Platform: All

Test and Documentation Plan

Unittest is passed. And the code is committed and running in Instagram production environment.

• Assignee: Jay Zhuang
• Reporter: Jay Zhuang

Authors

Jay Zhuang

• Created: 21/May/19 04:23
• Updated: 27/May/19 06:25

Description

Restarting a node causes gossip generation update. When it propagates the message to the cluster, every node blindly update its local token metadata even it is not changed. Update token metadata is expensive for large vnode cluster and causes token metadata cache unnecessarily invalided.