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From "Sameer Vaishampayan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6398) Print a warning if there is no local datanode
Date Thu, 18 Oct 2012 17:40:06 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13479172#comment-13479172
] 

Sameer Vaishampayan commented on HBASE-6398:
--------------------------------------------

Don't know why St.Ack's comments are not here. I remember his response was that the patch
as is will get report info for all data nodes every time the method is called, therefore a
performance issue. This I am trying to rectify by adding a new API which will return me a
data node info for a particular data node given a hostname. This change is in Hadoop hdfs
and therefore has a longer dependency.

The review for Hadoop changes is out :

https://reviews.apache.org/r/7630/



                
> Print a warning if there is no local datanode
> ---------------------------------------------
>
>                 Key: HBASE-6398
>                 URL: https://issues.apache.org/jira/browse/HBASE-6398
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Elliott Clark
>            Assignee: Sameer Vaishampayan
>              Labels: noob
>         Attachments: 6398-4.patch
>
>
> When starting up a RS HBase should print out a warning if there is no datanode locally.
 Lots of optimizations are only available if the data is machine local.

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