Speaker
Dr
Maxim Potekhin
(BROOKHAVEN NATIONAL LABORATORY)
Description
The Panda Workload Management System is designed around the concept of the Pilot Job - a "smart wrapper" for the payload executable, that can probe the
environment on the remote worker node before pulling down the payload
from the server and executing it. Such design allows for improved logging
and monitoring capabilities as well as flexibility in Workload Management.
In the Grid environment (such as the Open Science Grid), Panda Pilot Jobs
are submitted to remote sites via mechanisms that ultimately rely on Condor-G.
As our experience has shown, in cases where a large number of Panda jobs are
simultaneously routed to a particular remote site, the increased load on the
head node of the cluster, which is caused by the Pilot Job sumbission, may
lead to overall lack of scalability. We have developed a Condor-inspired
solution to this problem, which is using the schedd-based glidein, whose
mission is to redirect pilots to the native batch system. Once a glidein
schedd is installed and running, it can be utilized exactly the same way as
local schedds and therefore, from the user's perspective, Pilots thus
submitted are quite similar to jobs submitted to the local Condor pool.
| Presentation type (oral | poster) | poster |
|---|
Authors
Barnett Chiu
(BROOKHAVEN NATIONAL LABORATORY)
Dr
Maxim Potekhin
(BROOKHAVEN NATIONAL LABORATORY)
