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https://issues.apache.org/jira/browse/HDFS-16735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17585244#comment-17585244
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ASF GitHub Bot commented on HDFS-16735:
---------------------------------------
zhangshuyan0 commented on code in PR #4780:
URL: https://github.com/apache/hadoop/pull/4780#discussion_r955820370
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/HeartbeatManager.java:
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@@ -71,6 +71,7 @@ class HeartbeatManager implements DatanodeStatistics {
/** Heartbeat monitor thread. */
private final Daemon heartbeatThread = new Daemon(new Monitor());
private final StopWatch heartbeatStopWatch = new StopWatch();
+ private final int removeBatchNum;
Review Comment:
OK, I'll change the names.
> Reduce the number of HeartbeatManager loops
> -------------------------------------------
>
> Key: HDFS-16735
> URL: https://issues.apache.org/jira/browse/HDFS-16735
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Shuyan Zhang
> Assignee: Shuyan Zhang
> Priority: Major
> Labels: pull-request-available
>
> HeartbeatManager only processes one dead datanode (and failed storage) per
> round in heartbeatCheck(), that is to say, if there are ten failed storages,
> all datanode states need to be scanned 10 times, which is unnecessary and a
> waste of resources. This patch makes the number of bad storages processed per
> scan configurable.
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