Right and AN is not using ZK for the actual NameNode methods/functions, only for the failover election of the 'backup' NameNode?
On Sun, Apr 24, 2011 at 4:06 AM, Ozcan ILIKHAN <ilik...@cs.wisc.edu> wrote: > 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 > > Thanks, > Ozcan. > > -----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 > <jdcry...@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 <ilik...@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 >>> >> > >
