Login

Final Stretch Run 3 -- 2026 LHC Pb-Pb Ion Run meeting: Storage Requirements

→ Europe/Zurich
31/S-023 (CERN)

31/S-023

CERN

22
Show room on map
2026 LHC Pb-Pb Ion Run meeting: Storage Requirements
Zoom Meeting ID
67728546824
Host
Jakub Moscicki
Useful links
Join via phone
Zoom URL
Hide

Previous meeting for reference: https://indico.cern.ch/event/1596213/

Attendants: 

(IT) Luca Mascetti, Julien Leduc, Michael Davis, Jakub Moscicki, Xavier Espinall

(Experiments) Latchezar Betev, Edward Moyse, Ben Couturier, Lavigna Darlea, Jan van Eldik, Ivan Amos Cali, Jan Eysermans, Tomasz Bold, Phat Srimanobhas, Kiril Ivanov,

IT Storage group

 - we don't have much contingency on disk capacity, please let us know in advance in case of any changes wrt what we discussed here
 - summer tape recall plans: please let us know in advance for better coordination 
 - note that there are ongoing security patching campaigns in IT on various systems
 - our understanding so far is that High Intensity Run at the end of Run3 won't produce a lot of additional data 

ALICE

Alice won’t archive to tape during HI Run. Will delay archiving of 2025 data to save bandwidth during HI Run.
Currently 46PB free on EOS. Plan to delete ahead of HI Run.

Plans for tape recall during summer - no. First, archive the data collected during HI Run 2026.

ATLAS

EOS buffer can store up to 2 weeks of RAW data.
Plans for recall during summer - to be understood and confirmed.

Currently 11.6 PB free on EOS. Check if cleanup and any transfer to tape prior to HI run is needed.

CMS

Planned 12 GB/s average to tape.

Recall plans for summer: tbc.
Sending data to FNAL: can be flexibly scheduled over summer?

Currently EOS 20PB reserved for T0 activity. Quota assigned to groups could be adjusted if needed to make space.

LHCb

Same as last time. 9.2GB to tape.

No data during High Intensity Run.
Summer tape recalls to be planned.

Currently EOS free space: 25PB. 

 

There are minutes attached to this event. Show them.