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From "Yiqun Lin (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-11530) Use HDFS specific network topology to choose datanode in BlockPlacementPolicyDefault
Date Mon, 10 Apr 2017 10:59:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15962704#comment-15962704
] 

Yiqun Lin edited comment on HDFS-11530 at 4/10/17 10:59 AM:
------------------------------------------------------------

It seems that some tests are still failed due to different {{BlockPlacement}} plociy used
in HDFS.
For example when the different policy {{BlockPlacementPolicyWithNodeGroup}} used, it will

cast networkTopology instance to {{NetworkTopologyWithNodeGroup}} and then test will be failed,

I am thinking one reasonable way that we can use {{DFSNetworkTopology}} only if the current
block placement is the default way(BlockPlacementPolicyRackFaultTolerant). Otherwise, we use
the {{NetworkTopology#getInstance(conf)}}.
Attach the updated patch.
Any comments? [~vagarychen], [~arpitagarwal].


was (Author: linyiqun):
It seems that some tests are still failed due to different {{BlockPlacement}} plociy used
in HDFS.
I am thinking one reasonable way that we can use {{DFSNetworkTopology}} only if the current
block placement is the default way(BlockPlacementPolicyRackFaultTolerant). Otherwise, we use
the {{NetworkTopology#getInstance(conf)}}.
Attach the updated patch.
Any comments? [~vagarychen], [~arpitagarwal].

> Use HDFS specific network topology to choose datanode in BlockPlacementPolicyDefault
> ------------------------------------------------------------------------------------
>
>                 Key: HDFS-11530
>                 URL: https://issues.apache.org/jira/browse/HDFS-11530
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Yiqun Lin
>            Assignee: Yiqun Lin
>         Attachments: HDFS-11530.001.patch, HDFS-11530.002.patch, HDFS-11530.003.patch,
HDFS-11530.004.patch, HDFS-11530.005.patch, HDFS-11530.006.patch
>
>
> The work for {{chooseRandomWithStorageType}} has been merged in HDFS-11482. But this
method is contained in new topology {{DFSNetworkTopology}} which is specified for HDFS. We
should update this and let {{BlockPlacementPolicyDefault}} use the new way since the original
way is inefficient.



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