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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5659) dfsadmin -report doesn't output cache information properly
Date Sat, 21 Dec 2013 00:56:10 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13854717#comment-13854717
] 

Colin Patrick McCabe commented on HDFS-5659:
--------------------------------------------

bq. Like I said earlier, the names of PBHelper#convertDatanodeInfo and PBHelper#convert don't
suggest what the differences are between them, or what reason I would have for using one rather
than the other. Please, use descriptive names here.

actually, let's move this refactoring issue to HDFS-5694.  We'll want to do that in branch-2
as well, for one thing.

> dfsadmin -report doesn't output cache information properly
> ----------------------------------------------------------
>
>                 Key: HDFS-5659
>                 URL: https://issues.apache.org/jira/browse/HDFS-5659
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: caching
>    Affects Versions: 3.0.0
>            Reporter: Akira AJISAKA
>            Assignee: Andrew Wang
>         Attachments: hdfs-5659-1.patch, hdfs-5659-2.patch
>
>
> I tried to cache a file by "hdfs cacheadmin -addDirective".
> I thought the file was cached because "CacheUsed" at jmx was more than 0.
> {code}
> {
>     "name" : "Hadoop:service=DataNode,name=FSDatasetState-DS-1043926324-172.28.0.102-50010-1385087929296",
>     "modelerType" : "org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl",
>     "Remaining" : 5604772597760,
>     "StorageInfo" : "FSDataset{dirpath='[/hadoop/data1/dfs/data/current, /hadoop/data2/dfs/data/current,
/hadoop/data3/dfs/data/current]'}",
>     "Capacity" : 5905374474240,
>     "DfsUsed" : 11628544,
>     "CacheCapacity" : 1073741824,
>     "CacheUsed" : 360448,
>     "NumFailedVolumes" : 0,
>     "NumBlocksCached" : 1,
>     "NumBlocksFailedToCache" : 0,
>     "NumBlocksFailedToUncache" : 0
>   },
> {code}
> But "dfsadmin -report" didn't output the same value as jmx.
> {code}
> Configured Cache Capacity: 0 (0 B)
> Cache Used: 0 (0 B)
> Cache Remaining: 0 (0 B)
> Cache Used%: 100.00%
> Cache Remaining%: 0.00%
> {code}



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