Hi Prashanth, Sorry to disappoint :). Thats isnt true. Folks in HDFS are working on this currently.
Sanjay has uploaded a design doc in case you want to check it out: https://issues.apache.org/jira/browse/HDFS-1623 thanks mahadev On Sun, Jul 24, 2011 at 11:44 PM, Prashant <prashan...@imaginea.com> wrote: > On 07/19/2011 12:35 AM, Yang wrote: >> >> as described in >> >> http://www.google.com/url?sa=t&source=web&cd=1&ved=0CBgQFjAA&url=http%3A%2F%2Fhadoopblog.blogspot.com%2F2010%2F02%2Fhadoop-namenode-high-availability.html&ei=D4MkTsCrI8TRiALN4-mvAw&usg=AFQjCNFTIAn6ETjAxlC6s5u33sjTUARZQw&sig2=yIka9cpvn9qHvve95niefA >> >> and in the recent FB paper, AvatarNode is a different solution as the >> BackUpNode/CheckpointNode feature, right? >> -----since the link above says: "The HDFS BackupNode is not available >> in 0.20, and upgrading our cluster to hadoop 0.20 is not a feasible >> option for us because .... ". >> >> if they are different, is the FB AvatarNode feature is open-sourced ? >> if so, is it a better or worse solution than the current >> BackUpNode/CheckpointNode in apache distribution? >> >> Thanks >> yang >> > I think in current trunk version MR-279 branch hadoop has incorporated HA > for namenode using the Zookeeper service. I think that is a better technique > than Avatarnode's. I hope somebody can through light on this. >
