Mainz 2014 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 35: GRID-Computing

T 35.4: Vortrag

Montag, 24. März 2014, 17:30–17:45, P15

Tier2 Report goes HammerCloud — •Michael Böhler, Adil Aktas, Anton Gamel, and Jan Erik Sundermann — Albert-Ludwigs-Universität, Freiburg, Deutschland

The sites of the Worldwide LHC Computing Grid for the ATLAS, CMS, and LHCb experiments are monitored to evaluate performance and reliability using a large number of different workload jobs that are experiment specific. These jobs are steered, controlled and monitored by the HammerCloud testing infrastructure.

A framework has been developed for the GridKa ATLAS computing cloud which extracts and visualizes the most relevant information in order to identify possible minor issues and problems at computing sites, which do not cause large scale failures. While such issues are usually not conspicuous enough to warrant the blacklisting of a specific site, they still can cause a few percent job inefficiencies.

The original design of the framework was to provide overview tables and plots as a status report for the weekly GridKa cloud meetings. The plots have been integrated into the HammerCloud monitoring webpage, which enables the continuous monitoring of site performance such that any problems can be dealt with immediately.

This talk describes the different development steps of this infrastructure, from its first conception to a wider usage in the entire GridKa computing cloud, and finally to global usage worldwide.