Hi,
The next Research Network Engineering Community Call will be at 2pm on
Friday 26th April 2024. We will hear from Alessandra Forti and Katy
Ellis about the WLCG Data Challenge 2024 which took place in February.
Please register in advance:
https://jisc.zoom.us/meeting/register/tJAsf-CprD0oH9CQEQ-dPv3Q1Fg361OCicrv
After registering, you will receive a confirmation email containing
information about joining the meeting.
Abstract
The Worldwide Large Hadron Collider Computing Grid (WLCG) is the
distributed computing collaboration that provides computing resources
for the Large Hadron Collider at CERN. In 2026 the LHC will be upgraded
over a period of three years and in 2029 the High Luminosity LHC
(HL-LHC) will commence Run 4 collecting data at significantly higher
rates than currently at the LHC.
In February 2024 the WLCG held a data challenge to test out its ability
to transfer data at 25% of the rates expected in 2029. This week we have
two talks describing the experiences of the two general purpose
experiments on the LHC, ATLAS and CMS:
WLCG Data Challenge 2024: ATLAS experience: Alessandra Forti (University
of Manchester)
As part of the WLCG Data Challenge 2024 ATLAS exercised its distributed
infrastructure pushing 107 PB of data in 12 days with increasing rates
and more complex data distribution models. This talk will describe the
goals and the outlining steps to achieve them as well as the
difficulties encountered to move such a large amount of data in a
limited time over several hundreds of channels.
WLCG Data Challenge 2024: CMS activities and outcome: Katy Ellis (STFC
Rutherford Appleton Laboratory)
CMS took part in the WLCG Data Challenge in February 2024, moving around
60PB among ~45 globally distributed storage sites over 12 days. This
talk describes the planning, execution of the challenge and results, as
well as identifying bottlenecks in our system and lessons learnt.
Best wishes
Duncan Rand
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