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https://issues.apache.org/jira/browse/HDFS-10824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15497235#comment-15497235
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Arpit Agarwal commented on HDFS-10824:
--------------------------------------

Thanks for fixing this [~xiaobingo]. The test failure pointed out by 
[~cnauroth] also repro'd for me.

Minor comment - the member storageCap can just be a long[][] to avoid the 
conversions on lines 1663 and 2303.

> MiniDFSCluster#storageCapacities has no effects on real capacity
> ----------------------------------------------------------------
>
>                 Key: HDFS-10824
>                 URL: https://issues.apache.org/jira/browse/HDFS-10824
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Xiaobing Zhou
>            Assignee: Xiaobing Zhou
>         Attachments: HDFS-10824.000.patch, HDFS-10824.001.patch, 
> HDFS-10824.002.patch, HDFS-10824.003.patch
>
>
> It has been noticed MiniDFSCluster#storageCapacities has no effects on real 
> capacity. It can be reproduced by explicitly setting storageCapacities and 
> then call ClientProtocol#getDatanodeStorageReport(DatanodeReportType.LIVE) to 
> compare results. The following are  storage report for one node with two 
> volumes after I set capacity as 300 * 1024. Apparently, the capacity is not 
> changed.
> adminState|DatanodeInfo$AdminStates  (id=6861)
> |blockPoolUsed|215192|
> |cacheCapacity|0|
> |cacheUsed|0|
> |capacity|998164971520|
> |datanodeUuid|"839912e9-5bcb-45d1-81cf-9a9c9c02a00b" (id=6862)|
> |dependentHostNames|LinkedList<E>  (id=6863)|
> |dfsUsed|215192|
> |hostName|"127.0.0.1" (id=6864)|
> |infoPort|64222|
> |infoSecurePort|0|
> |ipAddr|"127.0.0.1" (id=6865)|
> |ipcPort|64223|
> |lastUpdate|1472682790948|
> |lastUpdateMonotonic|209605640|
> |level|0|
> |location|"/default-rack" (id=6866)|
> |maintenanceExpireTimeInMS|0|
> |parent|null|
> |peerHostName|null|
> |remaining|20486512640|
> |softwareVersion|null|
> |upgradeDomain|null|
> |xceiverCount|1|
> |xferAddr|"127.0.0.1:64220" (id=6855)|
> |xferPort|64220|
> [0]StorageReport  (id=6856)
> |blockPoolUsed|4096|
> |capacity|499082485760|
> |dfsUsed|4096|
> |failed|false|
> |remaining|10243256320|
> |storage|DatanodeStorage  (id=6869)|
> [1]StorageReport  (id=6859)
> |blockPoolUsed|211096|
> |capacity|499082485760|
> |dfsUsed|211096|
> |failed|false|
> |remaining|10243256320|
> |storage|DatanodeStorage  (id=6872)|



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