[HDFS-17087] Add Throttler for datanode reading block

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: datanode
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Haiyang Hu
• Reporter: Haiyang Hu
• Created: 15/Jul/23 12:45
• Updated: 28/Jan/24 01:54
• Resolved: 17/Aug/23 01:35

Description

DataXceiver#readBlock code is:

...
  read = blockSender.sendBlock(out, baseStream, null); // send data
..

Current DataXceiver#readBlock doesn't throttler, maybe we can support throttle for reading block satisfied catering for specific scenarios.

Default read throttler value is still null.

Issue Links

• links to: GitHub Pull Request #5845