Apr 15 – 19, 2013
CNAF Bologna (Italy)
Europe/Rome timezone

Experience operating multi-PB disk storage systems (CASTOR and EOS)

Apr 18, 2013, 1:45 PM
CNAF Bologna (Italy)

CNAF Bologna (Italy)

Presentation Storage & Filesystems Storage and filesystems


Luca Mascetti (CERN)


After the strategic decision in 2011 to separate Tier0 activity from analysis, CERN-IT is now operating two large-volume physics file store: CASTOR and EOS. CASTOR is our historical storage system in production since many years, which now mainly handle the Tier0 activities as well as all tape-backed data. EOS is in production since 2011 for ATLAS and CMS, it supports the fast-growing need for high performance and low latency data access mainly for user analysis. In 2012 two new EOS instances were created (ALICE and LHCb) and a big migration of diskonly pools took place. In Summer 2013 we plan to set up a shared "non-LHC" instance for the others experiments. The presentation will be focused on CASTOR and EOS diskpools operations with a particular emphasis on efficiency, inefficiency, costs and future improvements.

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