On Thu, Oct 1, 2009 at 10:53 AM, Stas Oskin <stas.os...@gmail.com> wrote:
> Hi > > I'm looking into Name Node high availability, but so far found only an > approach using DRBD. > I tried to make it work using Xen over DRBD, but it didn't quite work - in > fact I received a very valuable experience of recovering meta-data from > SecondaryNameNode. :) > Could you share the way in which it didn't quite work? Would be valuable information for the community. Always good to learn how to recover metadata :) You can do fire drills like this on a pseudodistributed cluster too - probably good for any ops people out there who haven't tried it before. > > Are there any other approaches which will make the NameNode > highly-available? > > I think this discussion came up last week on the list. Check the archives. > Also, if we speaking about this, is it possible to use the config directory > from NFS, to have a single configuration for all the node? > > Yes, it should work fine, but you'll really be kicking yourself when your NFS server is down and thus the entirety of your Hadoop cluster won't start either :) I'd recommend rsync, personally. Keep things simple :) -Todd
