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https://issues.apache.org/jira/browse/HDFS-611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zheng Shao updated HDFS-611:
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Attachment: HDFS-611.branch-19.patch
This patch adds a new class BlockFileDeleter, which delete block files
asynchronously using one ThreadPoolExecutor for each volume. BlockFileDeleter
is used internally in FSDataset.
> Heartbeats times from Datanodes increase when there are plenty of blocks to
> delete
> ----------------------------------------------------------------------------------
>
> Key: HDFS-611
> URL: https://issues.apache.org/jira/browse/HDFS-611
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Reporter: dhruba borthakur
> Assignee: Zheng Shao
> Attachments: HDFS-611.branch-19.patch
>
>
> I am seeing that when we delete a large directory that has plenty of blocks,
> the heartbeat times from datanodes increase significantly from the normal
> value of 3 seconds to as large as 50 seconds or so. The heartbeat thread in
> the Datanode deletes a bunch of blocks sequentially, this causes the
> heartbeat times to increase.
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