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From "Erik Krogen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-12818) Support multiple storages in DataNodeCluster / SimulatedFSDataset
Date Thu, 16 Nov 2017 01:20:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Erik Krogen updated HDFS-12818:
    Attachment: HDFS-12818.001.patch

Attaching v001 patch to address license issues.

Looked through the test failures and it seems they are OOM-related due to not enough native
threads, related to new enforcement from HDFS-12711

> Support multiple storages in DataNodeCluster / SimulatedFSDataset
> -----------------------------------------------------------------
>                 Key: HDFS-12818
>                 URL: https://issues.apache.org/jira/browse/HDFS-12818
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode, test
>            Reporter: Erik Krogen
>            Assignee: Erik Krogen
>            Priority: Minor
>         Attachments: HDFS-12818.000.patch, HDFS-12818.001.patch
> Currently {{SimulatedFSDataset}} (and thus, {{DataNodeCluster}} with {{-simulated}})
only supports a single storage per {{DataNode}}. Given that the number of storages can have
important implications on the performance of block report processing, it would be useful for
these classes to support a multiple storage configuration.

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