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https://issues.apache.org/jira/browse/HDFS-4988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13778478#comment-13778478
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Junping Du commented on HDFS-4988:
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For Nicholas' above suggestions:
bq. I suggest not to manually fix the imports. We may use some IDE tools to fix
them (e.g. cmd-shit-o in eclipse.)
I agree. Previously, I filed a JIRA HDFS-5019 to fix all imports issue in HDFS
project. I can sync up the patch if you have bandwidth to review it. (that
patch is too easy to out of sync :()
> Datanode must support all the volumes as individual storages
> ------------------------------------------------------------
>
> Key: HDFS-4988
> URL: https://issues.apache.org/jira/browse/HDFS-4988
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: Suresh Srinivas
> Assignee: Arpit Agarwal
> Attachments: HDFS-4988.01.patch, HDFS-4988.02.patch,
> HDFS-4988.05.patch, HDFS-4988.06.patch, HDFS-4988.07.patch
>
>
> Currently all the volumes on datanode is reported as a single storage. This
> change proposes reporting them as individual storage. This requires:
> # A unique storage ID for each storage
> #* This needs to be generated during formatting
> # There should be an option to allow existing disks to be reported as single
> storage unit for backward compatibility.
> # A functionality is also needed to split the existing all volumes as single
> storage unit to to individual storage units.
> # -Configuration must allow for each storage unit a storage type attribute.
> (Now HDFS-5000)-
> # Block reports must be sent on a per storage basis. In some cases (such
> memory tier) block reports may need to be sent more frequently. That means
> block reporting period must be on a per storage type basis.
> My proposal is for new clusters to configure volumes by default as separate
> storage unit. Lets discuss.
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