CMS Tier-3 News Item

New Tier-3 Environment based on RHEL9 - Test users wanted

Summary

New Tier-3 nodes are available. Access to the system requires using an MFA bastion host. We are searching for test users. You will benefit from 2816 job slots and a powerful new UI machine, all based on RHEL9.

Resources in the new Tier-3

Note that we do not yet have any GPU machines in the new Tier-3 part. We will have to migrate the very old ones, once we do the full migration.

These are the current resources in the new part of the Tier-3

Name	No. of	cores	Job Slots	Memory	Memory per	Total	Total	/scratch	/scratch	Netw bw	bw p Slot	Processor type
	nodes	p node	per node	(GB)	Slot (GB)	cores	Slots	p node (GB)	p slot (GB)	p node Gbs	MB/s
t3wn[80-91]	12	128	256	512	2.0	1536	3072	7600	29.6875	10	4.9	AMD EPYC 7763
t3ui05	1	128	256	512	2.0	128	256	7600		10		AMD EPYC 7763
SUM	24					1664	4160

Note: The connectivity per node is not yet 10Gbs, we need to replace a switch in the next days.

The storage is the same as on the old Tier-3, i.e. you will find your familiar directories in /t3home, /work, /pnfs.

Links to new documentation

Here you can find more information for accessing and using the new resources

• Signing up for testing and Logging into the new Tier-3 through the gateway, requires setting up MFA
• Using containers to work with older CMSSW versions on RHEL9

DerekFeichtinger 22. 05. 2025