MIT Tier-2 Report – April 23, 2025

SiteReadiness: 71.4%

SAM tests: 91.8%

We were adding for the first time more disks into one of the storage nodes. As a result of inexperience with CepFS internals one of the disks reached full state, and CephFS put itself into read only state. This affected our availability for two days. I asked Rucio team to put us in read only mode until storage disks are balanced. I also had to stop transferring data from HDFS into CephFS. I see that disk usage slowly getting even, but it is taking very long time.

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