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https://issues.apache.org/jira/browse/HDFS-17077?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xuze Yang updated HDFS-17077:
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Attachment: 0001-HDFS-17077-slow-disks-should-be-used-when-no-more-no.patch
Status: Patch Available (was: Open)
> slow disks should be used when no more normal disks are available
> -----------------------------------------------------------------
>
> Key: HDFS-17077
> URL: https://issues.apache.org/jira/browse/HDFS-17077
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 3.3.5
> Reporter: Xuze Yang
> Priority: Major
> Attachments:
> 0001-HDFS-17077-slow-disks-should-be-used-when-no-more-no.patch,
> image-2023-07-10-15-12-21-760.png
>
>
> When slow disks detection is enabled, hdfs can distinguish __ slow disks
> among all disks in a datanode. When a disk is regard as a slow disk, it will
> be excluded when choosing volume. The code is shown as below:
> !image-2023-07-10-15-12-21-760.png!
> Problem appears if all normal disks is fulled or being fatal state while slow
> disks is available, then no disks will be chosen and no data can be
> successfully written. In this situation, I think we should let slow disks be
> chosen, it's more reasonable.
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