[HDDS-9936] Create a DispatcherContext for ReadChunk and GetSmallFile

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Ozone Datanode
• Labels: pull-request-available
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 15/Dec/23 19:19
• Updated: 18/Dec/23 18:30

Description

For ReadChunk and GetSmallFile, it currently does not really require a DispatcherContext. So HDDS-9697 set a constant context for them.

In this JIRA, we change it to creating a new DispatcherContext for ReadChunk and GetSmallFile. It is required by HDDS-9536 for storing the read buffers in order to release the buffers after the operation has completed.

Issue Links

• is required by: HDDS-9536 Datanode perf: Copying (heap) buffers is costly
• links to: GitHub Pull Request #5805