Hexiaoqiao commented on code in PR #5809:
URL: https://github.com/apache/hadoop/pull/5809#discussion_r1255390061
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/metrics/FSDatasetMBean.java:
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@@ -122,4 +122,9 @@ public interface FSDatasetMBean extends MetricsSource {
* Returns the number of blocks that the datanode was unable to uncache
*/
public long getNumBlocksFailedToUncache();
+
+ /**
+ * Returns the last time in milliseconds of directory scanner run.
+ */
+ public long getLastDirectoryScannerRunTime();
Review Comment:
This name will be little misleading if it is the begin or end time of one
loop of DirectoryScanner.
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