[HDFS-15879] Exclude slow nodes when choose targets for blocks

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.1, 3.4.0
• Fix Version/s: 3.3.1, 3.4.0
• Component/s: block placement
• Labels: pull-request-available
• Target Version/s: 3.3.1, 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Tao Li
• Reporter: Tao Li
• Created: 06/Mar/21 01:38
• Updated: 11/Feb/24 08:52
• Resolved: 27/Mar/21 09:01

Description

Previously, we have monitored the slow nodes, related to HDFS-11194.

We can use a thread to periodically collect these slow nodes into a set. Then use the set to filter out slow nodes when choose targets for blocks.

This feature can be configured to be turned on when needed.

Issue Links

• links to: GitHub Pull Request #2748
• links to: GitHub Pull Request #2928