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From "Ozcan ILIKHAN" <ilik...@cs.wisc.edu>
Subject Re: HDFS + ZooKeeper
Date Sun, 24 Apr 2011 11:06:10 GMT
I have read  Dhruba's blog entry about AvatarNode long ago. If I am not 
wrong initially it was not using ZooKeeper. That is way I raised that 
question. Also, AvatorNode is build on HDFS 0.20 but my intension is to 
utilize BackupNode that comes with HDFS 0.21


-----Original Message----- 
From: Jason Rutherglen
Sent: Saturday, April 23, 2011 1:17 PM
To: hdfs-user@hadoop.apache.org
Subject: Re: HDFS + ZooKeeper

This is an interesting question.  AvatarNode doesn't use Zookeeper?
Is there a drawback to implementing ZK for the NameNode other than the
potential bugs from a newly engineered feature?

Perhaps this issue is the main one for implementing the NameNode in
ZK?  HDFS-1623

On Fri, Apr 22, 2011 at 10:41 PM, Jean-Daniel Cryans
<jdcryans@apache.org> wrote:
> This is a 1M$ question. You could start thinking about this problem by
> looking at what "AvatarNode" does:
> https://issues.apache.org/jira/browse/HDFS-976
> J-D
> On Fri, Apr 22, 2011 at 10:17 PM, Ozcan ILIKHAN <ilikhan@cs.wisc.edu> 
> wrote:
>> Hi,
>> Does anyone have any idea about how we can use HDFS with ZooKeeper? More
>> elaborately if NameNode fails DataNodes should be able to retrieve 
>> address
>> of new NameNode from ZooKeeper.
>> Thanks,
>> ---------------------------------
>> Ozcan ILIKHAN
>> PhD Student, Graduate Research Assistant
>> Department of Computer Sciences
>> University of Wisconsin-Madison
>> http://pages.cs.wisc.edu/~ilikhan

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