[HDDS-6849] OM changes for tracking Snapshot Metadata

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3.0
• Fix Version/s: 1.3.0
• Component/s: Ozone Manager
• Labels: pull-request-available
• Assignee: Neil Joshi
• Reporter: Prashant Pogde
• Created: 09/Jun/22 02:31
• Updated: 03/Aug/22 11:42
• Resolved: 03/Aug/22 11:42

Description

This Jira will be used to track changes for maintaining additional metadata to support Snapshot feature. This will include on-disk structure i.e. new RocksDB table(s) to track 

• all buckets that are snapshotted
• list of all the snapshots for such buckets 

In-memory structure would maintain an LRU cache of snapshot-chains for snapshotted buckets as required. - see HDDS-6983

Also, Refer to CheckpointBasedDesign doc for details.

Issue Links

• split to: HDDS-6983 Snapshot Chain - list of snapshots per snapshottable bucket
• links to: GitHub Pull Request #3582