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https://issues.apache.org/jira/browse/HDFS-5498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HDFS-5498:
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Attachment: HDFS-5498_sh.patch
Attaching a new patch.
[~vinayrpet], you are right. I added a shutdown hook in the new patch, so that
the usage values can be saved on receiving SIGTERM. We may add a DN-level
shutdown hook, but that's beyond the scope of this jira.
It does not have any functional dependency but the patch was created on top of
HDFS-5585, HDFS-5583 and HDFS-5924. Without them, it will be missing some
imports and context may be wrong.
> Improve datanode startup time
> -----------------------------
>
> Key: HDFS-5498
> URL: https://issues.apache.org/jira/browse/HDFS-5498
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Attachments: HDFS-5498.with_du_change.patch,
> HDFS-5498.with_du_change.patch, HDFS-5498_sh.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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