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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11086) DataNode disk check improvements
Date Tue, 01 Nov 2016 21:51:58 GMT
Arpit Agarwal created HDFS-11086:
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             Summary: DataNode disk check improvements
                 Key: HDFS-11086
                 URL: https://issues.apache.org/jira/browse/HDFS-11086
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
            Reporter: Arpit Agarwal
            Assignee: Arpit Agarwal


This Jira tracks a few improvements to DataNode’s usage of DiskChecker to address the following
problems:
# Checks are serialized so a single slow disk can indefinitely delay checking the rest.
# Related to 1, no detection of stalled checks.
# Lack of granularity. A single IO error initiates checking all disks.
# Inconsistent activation. Some DataNode IO failures trigger disk checks but not all.



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