ayushtkn commented on a change in pull request #4009:
URL: https://github.com/apache/hadoop/pull/4009#discussion_r819740564
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/sps/StoragePolicySatisfyManager.java
##########
@@ -292,4 +292,13 @@ public boolean isEnabled() {
public StoragePolicySatisfierMode getMode() {
return mode;
}
+
+ /**
+ * @return the number of paths to be processed by storage policy satisfier.
+ */
+ public int getPendingSPSPaths() {
+ synchronized (pathsToBeTraversed) {
+ return pathsToBeTraversed.size();
+ }
Review comment:
This is synchronised and will be called a bunch of times. What impact is
it going to have on normal SPS performance
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
##########
@@ -5524,6 +5524,11 @@ public int getBlockCapacity() {
return blockManager.getCapacity();
}
+ @Metric({"PendingSPSPaths", "The number of paths to be processed by storage
policy satisfier"})
+ public int getPendingSPSPaths() {
Review comment:
Do you not plan to add this method to ``FSNamesystemMBean``?
if no specific reason, we should add it there, this is quite specific to FSN
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