Network usage for LHCOPN/LHCONE meeting (October)20m
Asked to help collecting information to add to the ATLAS presentation at the next LHCOPN/LHCONE meeting.
A Couple of plots available showing the Manchester upgrade (local prometheus vs ddm dashboard. But there are few more info and plots we can collect.
For representative sites (e.g. 1k slots, 5k, 10k, 100k) network plots ,
FTS and internal (split).
→ important to know the external network config.
Sites with Ceph can the internal storage replication traffic be monitored?
Looking at RAL, Lancs and Glasgow here
CVMFS cache traffic manchester squids don't go beyond 30MB/s with an average of 7-8 MB/s so ~ 60-70 Mb/s is negligible.
I assume the same for everyone?
StorageLess sites Oxford and Bham plots.
The picture James presented at gridpp48 was a bit foggy. It is not clear if the caches work or they are a nuisance.
But to me the main problem is to understand if we have a monitoring we can reliably look at when there are changes such as enabling disabling VP.
Or adding removing the cache between the remote node and the WNs.