CMS Tier-3 News Item

All the t3wn will be migrated to SL6 by the end of Jan 2015

Summary

Both CMSSW and WLCG expects a SL6 T3 to properly work, so all our SL5 t3wn* will be reinstalled as SL6 t3wn*

Details

During the recent T3 Steering Board meeting held in Dec '14 at ETHZ the T3 Institute representatives agreed about the complete migration of the T3 to SL6 by the end of Jan 2015 ; the SL6 migration will silently happen behind the scenes without further notice from the T3 admins ; the T3 users will just notice the shrinking of the SL5 t3wn* and the increasing of the SL6 t3wn*. Eventually a user job requesting a SL5 queue will get pending forever because of the lack a SL5 t3wn

In order to be ready for the end of the SL5 t3wn* age all the T3 users have to migrate to the SL6 t3ui1* servers and submit their jobs just from there to automatically send their jobs to the SL6 t3wn*

Following the SL6 t3wn* migration just the old SL5 t3ui0* will be left as they are but the direct SSH connection from Internet will be prevented ; at that time the T3 users will have to use the SL6 t3ui1* servers as a bridge to login into a SL5 t3ui0* server by SSH.

Furthermore the SL5 t3ui0* HW maintenance and monitoring won't be performed anymore ( no broken disks swapped, no broken RAM swapped, etc.. ) and we might recycle the SL5 t3ui0* HW components to repair a compatible broken SL6 t3wn*

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FabioMartinelli 15. 12. 2014