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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7692) DataStorage#addStorageLocations(...) should support MultiThread to speedup the upgrade of block pool at multi storage directories.
Date Wed, 06 May 2015 03:26:57 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7692?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer updated HDFS-7692:
-----------------------------------
    Labels: BB2015-05-TBR  (was: )

> DataStorage#addStorageLocations(...) should support MultiThread to speedup the upgrade
of block pool at multi storage directories.
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7692
>                 URL: https://issues.apache.org/jira/browse/HDFS-7692
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 2.5.2
>            Reporter: Leitao Guo
>            Assignee: Leitao Guo
>              Labels: BB2015-05-TBR
>         Attachments: HDFS-7692.01.patch
>
>
> {code:title=DataStorage#addStorageLocations(...)|borderStyle=solid}
>     for (StorageLocation dataDir : dataDirs) {
>       File root = dataDir.getFile();
>      ... ...
>         bpStorage.recoverTransitionRead(datanode, nsInfo, bpDataDirs, startOpt);
>         addBlockPoolStorage(bpid, bpStorage);
>     ... ...
>       successVolumes.add(dataDir);
>     }
> {code}
> In the above code the storage directories will be analyzed one by one, which is really
time consuming when upgrading HDFS with datanodes have dozens of large volumes.  MultiThread
dataDirs analyzing should be supported here to speedup upgrade.



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