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https://issues.apache.org/jira/browse/HDFS-15619?focusedWorklogId=534120&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-534120
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ASF GitHub Bot logged work on HDFS-15619:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 11/Jan/21 04:40
Start Date: 11/Jan/21 04:40
Worklog Time Spent: 10m
Work Description: bshashikant commented on a change in pull request #2595:
URL: https://github.com/apache/hadoop/pull/2595#discussion_r554708986
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/NameNodeMetrics.java
##########
@@ -26,13 +26,7 @@
import org.apache.hadoop.metrics2.MetricsSystem;
import org.apache.hadoop.metrics2.annotation.Metric;
import org.apache.hadoop.metrics2.annotation.Metrics;
-import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
-import org.apache.hadoop.metrics2.lib.MetricsRegistry;
-import org.apache.hadoop.metrics2.lib.MutableCounterLong;
-import org.apache.hadoop.metrics2.lib.MutableGaugeInt;
-import org.apache.hadoop.metrics2.lib.MutableQuantiles;
-import org.apache.hadoop.metrics2.lib.MutableRate;
-import org.apache.hadoop.metrics2.lib.MutableStat;
+import org.apache.hadoop.metrics2.lib.*;
Review comment:
Please remove * imports.
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/NameNodeMetrics.java
##########
@@ -87,6 +81,19 @@
MutableGaugeInt blockOpsQueued;
@Metric("Number of blockReports and blockReceivedAndDeleted batch processed")
MutableCounterLong blockOpsBatched;
+ @Metric("Number of snapshot GC runs")
+ MutableCounterLong numSnapshotGcRun;
+ @Metric("Number of empty snapshot GC runs")
+ MutableCounterLong numSnapshotGcRunEmpty;
Review comment:
Any specific use case for numSnapshotGcRunEmpty metric ??
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/NameNodeMetrics.java
##########
@@ -459,4 +466,23 @@ public void addEditLogTailInterval(long elapsed) {
q.add(elapsed);
}
}
+ public void incrNumSnapshotDelete() {
+ numSnapshotTotalDeleteOp.incr();
+ }
+ public void incrOutOfOrderSnapshotDelete() {
+ numSnapshotOutOfOrderDeleteOp.incr();
+ }
+ public void incrInOrderSnapshotDelete() {
+ numSnapshotInOrderDeleteOp.incr();
+ }
+ public void incrNumSnapshotGcRun() {
+ numSnapshotGcRun.incr();
+ }
+ public void incrNumSnapshotSuccessGcRun() {
+ numSnapshotGcRunSuccess.incr();
+ }
+ public void incrNumSnapshoteEmptyGcRun() {
+ numSnapshotGcRunEmpty.incr();
+ }
+
Review comment:
These metric ideally should be part of SnapshotMetrics to be precise.
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Issue Time Tracking
-------------------
Worklog Id: (was: 534120)
Time Spent: 0.5h (was: 20m)
> Metric for ordered snapshot deletion GC thread
> ----------------------------------------------
>
> Key: HDFS-15619
> URL: https://issues.apache.org/jira/browse/HDFS-15619
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs
> Reporter: Nilotpal Nandi
> Assignee: Nilotpal Nandi
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Following info should be captured and shown in JMX for garbage collection
> thread of ordered snapshot deletion
> * metric for all pending snapshots to be GCed
> * Number of times GC thread ran
> * Number of Snapshots already GCed
> * Average time taken by each GC run
> * Thread running Status
> * metric for failed deletion of GC thread
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