[CASSANDRA-12345] Gossip 2.0

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Won't Fix
• Component/s: Legacy/Core
• Labels: gossip
• Assignee: Jason Brown
• Reporter: Jason Brown

Authors

Jason Brown

• Created: 29/Jul/16 21:57
• Updated: 12/Jun/19 15:39
• Resolved: 12/Jun/19 15:39

Description

This is a parent ticket covering changes to the dissemination aspects of the current gossip subsystem. (Changes to the actual data being exchanged by the current gossip (the cluster metadata) will be handled elsewhere, but the current primary ticket covering that work is CASSANDRA-9667.)

This work requires several components, which largely need to completed in this order:

• a peer sampling service to create partial cluster views (CASSANDRA-12346). This forms the basis of the next two components
• a broadcast tree, which creates dynamic spanning trees given the partial views provided by the peer sampling service (CASSANDRA-12347)
• an anti-entropy component, which is similar to the pair-wise exchange and reconciliation of the exitsing gossip implementation (CASSANDRA-???)

These base components (primarily the broadcast and anti-entropy) can allow for generic consumers to simply and effectively share a body of data across an entire cluster. The most obvious consumer will be a cluster metadata component, which can replace the existing gossip system, but also other components like CASSANDRA-12106.

Issue Links

• requires: CASSANDRA-12346 Gossip 2.0 - introduce a Peer Sampling Service for partial cluster views
• requires: CASSANDRA-12347 Gossip 2.0 - broadcast tree for data dissemination