EPJ Web of Conferences (Jan 2019)

Exploring GlideinWMS and HTCondor scalability frontiers for an expanding CMS Global Pool

  • Pérez-Calero Yzquierdo Antonio,
  • Bockelman Brian Paul,
  • Davila Foyo Diego,
  • Hurtado Anampa Kenyi,
  • Trendafilov Ivanov Todor,
  • Aftab Khan Farrukh,
  • Kotobi Amjad,
  • Larson Krista,
  • Letts James,
  • Mascheroni Marco,
  • Mason David

DOI
https://doi.org/10.1051/epjconf/201921403002
Journal volume & issue
Vol. 214
p. 03002

Abstract

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The CMS Submission Infrastructure Global Pool, built on Glidein-WMS andHTCondor, is a worldwide distributed dynamic pool responsible for the allocation of resources for all CMS computing workloads. Matching the continuously increasing demand for computing resources by CMS requires the anticipated assessment of its scalability limitations. In addition, the Global Plmust be able to expand in a more heterogeneous environment, in terms of resource provisioning (combining Grid, HPC and Cloud) and workload submissi.A dedicated testbed has been set up to simulate such conditions with the purpose of finding potential bottlenecks in the software or its configuration. This report provides a thorough description of the various scalabilitydimensions in size and complexity that are being explored for the future Global Pool, along with the analysis and solutions to the limitations proposed with the support of the GlideinWMS and HTCondor developer teams.