You can use the copy of fsimage and the editlog from the SNN to recover. Remember that it will be (roughly) an hour old. The process for recovery is to copy the fsimage and editlog to a new machine, place them in the dfs.name.dir/current directory, and start all the daemons. It's worth practicing this type of procedure before trying it on a production cluster. More importantly, it's worth practicing this *before* you need it on a production cluster.
On Thu, May 13, 2010 at 5:01 AM, Jeff Zhang <zjf...@gmail.com> wrote: > Hi all, > > I wonder is it enough for recovering hadoop cluster by just coping the > meta data from SecondaryNameNode to the new master node ? Do I any > need do any other stuffs ? > Thanks for any help. > > > > -- > Best Regards > > Jeff Zhang > -- Eric Sammer phone: +1-917-287-2675 twitter: esammer data: www.cloudera.com
