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https://issues.apache.org/jira/browse/HDFS-15619?focusedWorklogId=543708&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-543708
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ASF GitHub Bot logged work on HDFS-15619:
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Author: ASF GitHub Bot
Created on: 28/Jan/21 16:04
Start Date: 28/Jan/21 16:04
Worklog Time Spent: 10m
Work Description: nilotpalnandi commented on a change in pull request
#2595:
URL: https://github.com/apache/hadoop/pull/2595#discussion_r566212069
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File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/NameNodeMetrics.java
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@@ -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:
numSnapshotGcRunEmpty would be useful BDR runs where we can track the
number of non-GCed cycles.
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Issue Time Tracking
-------------------
Worklog Id: (was: 543708)
Time Spent: 1h 10m (was: 1h)
> 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: 1h 10m
> 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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