[YARN-3943] Use separate threshold configurations for disk-full detection and disk-not-full detection.

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: nodemanager
• Hadoop Flags: Reviewed
• Assignee: Zhihai Xu
• Reporter: Zhihai Xu
• Created: 20/Jul/15 21:11
• Updated: 30/Aug/16 01:19
• Resolved: 08/Oct/15 22:27

Description

Use separate threshold configurations to check when disks become full and when disks become good. Currently the configuration "yarn.nodemanager.disk-health-checker.max-disk-utilization-per-disk-percentage" and "yarn.nodemanager.disk-health-checker.min-free-space-per-disk-mb" are used to check both when disks become full and when disks become good. It will be better to use two configurations: one is used when disks become full from not-full and the other one is used when disks become not-full from full. So we can avoid oscillating frequently.
For example: we can set the one for disk-full detection higher than the one for disk-not-full detection.