Details
-
Improvement
-
Status: Closed
-
Minor
-
Resolution: Fixed
-
2.0.4-alpha
-
None
-
None
-
Reviewed
Description
With the new feature added in HDFS-1804 (Add a new block-volume device choosing policy that looks at free space), it'd be useful to have a WARN log if the operator sets dfs.datanode.fsdataset.volume.choosing.balanced-space-preference-percent to a value greater than 1.0. This might happen if the operator mistakenly assumes that this setting takes in a percentage number from 0.0-100.0, while the setting actually takes a range 0.0-1.0.
Also, it'd be useful to WARN in the case that value is set below 0.5, which would cause disks with less free space to get more block allocations.