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From "Xiaobing Zhou (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9262) Reconfigure DN lazy writer interval on the fly
Date Sat, 05 Dec 2015 00:24:11 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15042471#comment-15042471
] 

Xiaobing Zhou commented on HDFS-9262:
-------------------------------------

Thanks [~arpitagarwal] for review.
1. It's not possible cast DataNode#data to FsDatasetImpl that is package visible class within
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl, unless, we make it public.

2. Extending FsDatasetSpi to Reconfigurable actually changed the interface as overall so that
ExternalDatasetImpl and ExternalDatasetImpl all need to implement it although they don't need
it.

Is it good to relax the visibility? Thanks.

> Reconfigure DN lazy writer interval on the fly
> ----------------------------------------------
>
>                 Key: HDFS-9262
>                 URL: https://issues.apache.org/jira/browse/HDFS-9262
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>    Affects Versions: 2.7.0
>            Reporter: Xiaobing Zhou
>            Assignee: Xiaobing Zhou
>         Attachments: HDFS-9262.001.patch
>
>
> This is to reconfigure
> {code}
> dfs.datanode.lazywriter.interval.sec
> {code}
> without restarting DN.



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