CMS Tier-3 News Item

Downtime for major upgrade of the SE on Thu Nov 29th - Fri 30th

Summary

Dcache, the Storage Element SW will be upgraded. The upgrade involves a complete migration of the underlying data base to a new format (chimera). Therefore, all operations involving access to the SE must be stopped for the time of the upgrade.

Details

Main purpose of this downtime is the upgrade of some dCache components that got very old in respect of the others CMS sites and the recent dCache developments.

The downtime will start after 21:00 on 28th Nov to exploit also that night; probably it won't take all the weekend but for the time being please consider Sunday 2nd Dec at 23:00 as its scheduled end.

Each t3ui0[2-7] server will be left ON, but during the downtime any connection to the storage element will be unavailable, so please use the t3ui*/scratch filesystem to store in advance the files that you want to analyze.

Also the worker nodes and the batch system will be left ON but, again, users won't be able to download/upload files to the storage element.

Obviously all the Phedex operations will be stopped too.

---

DerekFeichtinger 02. 11. 2012