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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10958) Add instrumentation hooks around Datanode disk IO
Date Sat, 10 Dec 2016 03:22:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Arpit Agarwal updated HDFS-10958:
    Attachment: HDFS-10958.01.patch

Attached a patch to factor out most of the DataNode file IO dependencies into a FileIoProvider
class for easier testing/instrumentation. IO be hooked by implementing the new {{FileIoEvents}}
interface. The default hooks do nothing. A couple of classes have don't use FileIoProvider
yet (DataStorage and BlockPoolSliceStorage).

The patch aims to introduce no behavioral changes. Thanks to [~xyao] for reviewing an early
iteration of this large patch.

> Add instrumentation hooks around Datanode disk IO
> -------------------------------------------------
>                 Key: HDFS-10958
>                 URL: https://issues.apache.org/jira/browse/HDFS-10958
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>            Reporter: Xiaoyu Yao
>            Assignee: Arpit Agarwal
>         Attachments: HDFS-10958.01.patch
> This ticket is opened to add instrumentation hooks around Datanode disk IO based on refactor
work from HDFS-10930.

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