[IGNITE-17394] Implement API for getting partition mapping

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha5
• Fix Version/s: 3.0.0-beta1
• Labels: ignite-3
• Epic Link: Thin 3.0: Partition Awareness
• Ignite Flags: Docs Required
• Assignee: Mirza Aliev
• Reporter: Igor Sapego
• Created: 19/Jul/22 14:42
• Updated: 13/Oct/22 12:01
• Resolved: 11/Aug/22 16:55

Description

To implement Partition Awareness feature for clients, we need an internal or public API that will provide us with the following mapping: [partition => node id] (or [node id => partitions]).

We also need a lightweight mechanism that will allow us to discover that this distribution has changed. In 2.x we used a topology version for this purpose, assuming that if topology version has changed, partition distribution should be refreshed.

Issue Links

• relates to: IGNITE-17395 Thin 3.0: Design Partition Awareness for Ignite-3
• links to: GitHub Pull Request #997
• links to: PR