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https://issues.apache.org/jira/browse/HDFS-5498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13828245#comment-13828245
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Kihwal Lee commented on HDFS-5498:
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TestBalancerWithNodeGroup failure is not caused by this patch. TestDFSUpgrade
failed because the storage checksum comparison in the test does not take the
cache file into account. It is already skipping VERSION files, so it is simple
matter of adding the cache file to the blacklist.
> Improve datanode startup time
> -----------------------------
>
> Key: HDFS-5498
> URL: https://issues.apache.org/jira/browse/HDFS-5498
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Attachments: HDFS-5498.with_du_change.patch,
> HDFS-5498.with_du_change.patch
>
>
> Similarly to HDFS-5027, an improvement can be made for getVomeMap(). This is
> the phase in which ReplicaMap.is populated. But it will be even better if
> datanode scans only once and do both.
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