Depending on your windows version, there is a dos command called "subst" which you could use to virtualize a drive letter on your third machine
On Fri, May 30, 2008 at 4:35 AM, Sridhar Raman <[EMAIL PROTECTED]> wrote: > Should the installation paths be the same in all the nodes? Most > documentation seems to suggest that it is _*recommended*_ to have the > _*same > *_ paths in all the nodes. But what is the workaround, if, because of some > reason, one isn't able to have the same path? > > That's the problem we are facing right now. After making Hadoop work > perfectly in a 2-node cluster, when we tried to accommodate a 3rd machine, > we realised that this machine doesn't have a E:, which is where the > installation of hadoop is in the other 2 nodes. All our machines are > Windows machines. The possible solutions are: > 1) Move the installations in M1 & M2 to a drive that is present in M3. We > will keep this as the last option. > 2) Map a folder in M3's D: to E:. We used the "subst" command to do this. > But when we tried to start DFS, it wasn't able to find the hadoop > installation. Just to verify, we tried a ssh to the localhost, and were > unable to find the mapped drive. It's only visible as a folder of D:. > Whereas, in the basic cygwin prompt, we are able to view E:. > 3) Partition M3's D drive and create an E. This carries the risk of loss > of > data. > > So, what should we do? Is there any way we can specify in the NameNode the > installation paths of hadoop in each of the remaining nodes? Or is there > some environment variable that can be set, which can make the hadoop > installation path specific to each machine? > > Thanks, > Sridhar >
