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https://issues.apache.org/jira/browse/HDFS-15000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16999776#comment-16999776
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Aiphago edited comment on HDFS-15000 at 12/19/19 6:32 AM:
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submit demo patch.The main idea is to make IO opreate(the opreate may have
order depend) without lock and async and keep the opreate is in order.Any
suggestions or problems?
was (Author: aiphag0):
submit demo patch.The main idea is to make IO opreate(the opreate may have
order depend) without lock and async and keep the opreate is in order.
> Improve FsDatasetImpl to avoid IO operation in datasetLock
> ----------------------------------------------------------
>
> Key: HDFS-15000
> URL: https://issues.apache.org/jira/browse/HDFS-15000
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Xiaoqiao He
> Assignee: Aiphago
> Priority: Major
> Attachments: HDFS-15000.001.patch
>
>
> As HDFS-14997 mentioned, some methods in #FsDatasetImpl such as
> #finalizeBlock, #finalizeReplica, #createRbw includes IO operation in the
> datasetLock, It will block some logic when IO load is very high. We should
> reduce grain fineness or move IO operation out of datasetLock.
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