EOS Cross Tier Federation

For CHEP

2016 (San Francisco, Oct 2016)

Author(s)

Geoffray Adde, Andreas-Joachim Peters

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Abstract

Within the WLCG project EOS is evaluated as a platform to demonstrate efficient deployment of geographically distributed storage. Aim of distributed storage deployments is to reduce the number of individual end-points for LHC experiments (>100  today) and to minimize the required effort for small storage sites. The split of meta-data and data component in EOS allows to operate one regional high-available meta data service (MGM) and to deploy the easier to operate file storage compoment (FST) in geographically distributed sites. EOS has built-in support for geolocation-aware access scheduling, file placement policies and replication workflows.

This contribution will introduce the various concepts and discuss demonstrator deployments for several LHC experiments.

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