[HDDS-6540] Add a Cache for per-disk DB handles.

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.3.0
• Labels: pull-request-available
• Assignee: Mark Gui
• Reporter: Mark Gui
• Created: 01/Apr/22 13:45
• Updated: 05/May/22 09:57
• Resolved: 11/Apr/22 03:49

Description

A new Cache for per-disk db handles after rocksdb-merge.
Originally we have the ContainerCache for per-container db handles.
And we should have a new DatanodeStoreCache for per-disk db handles which should be relatively small.
 
We could choose whether to use the  DatanodeStoreCache or the ContainerCache according to the schema version in BlockUtils.getDB().

Issue Links

• links to: GitHub Pull Request #3283