MIT Tier-2 Report – May 21 2025

SiteReadiness: 100%

SAM tests: 92.2%

Mostly smooth operations over the last week. Almost finished with pushing data (what can easily be copied) into CephFS. However, there will be a couple of hundred thousand files missing, mostly in /store/mc, because I suspect those files are only available on tape and my tools are very inefficient transferring those files.

I will switch mostly to CephFS this Thursday. Three directories – /store/user, /store/temp, and /store/unmerged – will stay in HDFS for now. I plan to ask DM team to run consistency check and submit FTS requests that will make CephFS storage consistent with Rucio expectations.

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