[gpfsug-discuss] Executing Callbacks on other Nodes

[Roland Pabel]

Hi everyone,

we are using GPFS 4.1.0.8 with 4 servers and 850 clients. Our GPFS setup is 
fairly new, we are still in the testing phase. A few days ago, we had some 
problems in the cluster which seemed to have started with deadlocks on a small 
number of nodes. To be better prepared for this scenario, I would like to 
install a callback for Event deadlockDetected. But this is a local event and 
the callback is executed on the client nodes, from which I cannot even send an 
email.

Is it possible using mm-commands to instead delegate the callback to the 
servers (Nodeclass nsdNodes)?

I guess it would be possible to use a callback of the form "ssh nsd0 
/root/bin/deadlock-callback.sh", but then it is contingent upon server nsd0 
being available. The mm-command style "-N nsdNodes" would more reliable in my 
opinion, because it would be run on all servers. On the servers, I can then 
check to actually only execute the script on the cluster manager.

Thanks

Roland
-- 
Dr. Roland Pabel
Regionales Rechenzentrum der Universität zu Köln (RRZK)
Weyertal 121, Raum 3.07
D-50931 Köln

Tel.: +49 (221) 470-89589
E-Mail: pabel at uni-koeln.de