Dear All,
I’m trying to configure a small PROOF cluster (currently containing two machines), but I’m stuck. Maybe someone here will be able to help. (With Gerri still on holiday. 
)
I have two PCs in my office, one quad-core, pretty high-powered one, and a pretty old one. I’m just using the second one as a “proof of concept”. (No pun intended… 
) I’ve set up single machine “PROOF clusters” before, because I wanted to be able to send jobs to a machine from multiple other machines. That always worked well. Now I’d like to achieve the following setup:
- The bigger machine should act as a master, and it should also run 4 worker threads.
- The smaller machine should run one worker thread.
- The bigger machine has a big external disk that should be visible to all the nodes in the same way. (Only read access.)
- Both machines should have some local storage for the output of using TProofOutputFile.
I’ve created a configuration which you can find under
/afs/cern.ch/user/k/krasznaa/public/nyu_cluster/
PROOF actually seems to work, but when my application tries to collect the output ntuples from the worker nodes, it complains that it can’t access
root://peppe26.cern.ch//home/proof/kras … 9beef.root
(peppe26.cern.ch is the “smaller” machine.)
So the smaller machine is definitely not acting as a file server toward the master. I’m trying to find the solution in the online PROOF documentation, but these configuration issues are not described all that well I’m afraid. (At least I always make my configuration in a trial-and-error fashion…)
You can find the full logfile of this under
/afs/cern.ch/user/k/krasznaa/public/proof/FirstCycle.log
Any help would be much appreciated.
Cheers,
Attila