Understanding WLCG reporting

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Every month the WLCG reports on the performance of all T1 sites and T2 sites, showing how much “computing power” each site has delivered to the CMS experiment. This report is also stored in a database directly accessible at the CRIC page. The delivered “computing power” is measured as the active core hours at the … Read more

MIT Tier-2 Report – Nov. 5 2025

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SiteReadiness: 100.0% SAM tests: 96.3% We experienced a power outage at the host facility that started on Monday at around 10:30 a.m. and lasted for 3 hours. During the outage all worker nodes were offline. The storage, meanwhile, stayed online and was fully available.

MIT Tier-2 Power Outage

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There were arcs seen on the electrical switch gear that required a shutdown. The power outage at Bates started on Monday morning (11/03/2025) at around 10:30 a.m. All worker nodes went down, the UPS row including our CephFS storage and the networking switch stayed online. At 1:30 p.m. the problem was resolved by the Middleton … Read more

MIT Tape Ingestion Rate in the last Year

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With our tape site properly opened now for about a year it is interesting to see how we are doing. The plot of the data ingestion at MIT throughout the last year tells the story. Initially, in November/December of 2024, there were some tests on various channels which eventually resulted in MIT being declared open … Read more