[CASSANDRA-16141] Enable Adding and Removing Tokens to a Node (Dynamic Virtual Nodes)

• Type: New Feature
• Status: Triage Needed
• Priority: Normal
• Resolution: Unresolved
• Component/s: Cluster/Membership, Feature/Virtual Nodes
• Epic Link: Improve Ring Membership Management
• Platform: All
• Assignee: Unassigned
• Reporter: Paulo Motta
• Created: 23/Sep/20 14:28
• Updated: 23/Sep/20 18:31

Description

The new ring membership protocol added on CASSANDRA-16139 allows adding and removing tokens to an existing cluster node.

This allows operators to increase/reduce the number of virtual nodes per node on a live cluster. Furthermore this also enables Incremental Bootstrap (CASSANDRA-8494).

This ticket is to enable this functionality to users via ringtool (CASSANDRA-16140).

The pseudo-code for each operation is available below:

• add token (essentially similar to bootstrap)
• remove token

Issue Links

• is required by: CASSANDRA-8494 incremental bootstrap
• requires: CASSANDRA-16139 Safe Ring Membership Protocol