NET2 is facing a challenging issue with sites not using LHCONE.

This plot shows our "commodity internet" WAN link, which is not supposed to receive data. This last week, we saw several peaks at ~20 Gb/s of data being transferred from UK and GE sites to NET2 using this link. This has a negative impact to other people using the same "commodity internet" link in our science DMZ and it's not acceptable. If this continue, we will have to rate-limit this connection to 10 Gb/s negatively impacting the NET2 transfer efficiency.

We have been observing that the number of non-LHCONE transfers is increasing with time. These 20 Gb/s peaks used to be rare and this last week they became very common.

Discussion:

Can we do something at the WLCG/ATLAS level to fix this?
Can we do something at the US ATLAS level to fix this?

month

Downtime from Sunday night through Thursday afternoon last week due to yearly maintenance period at the data center, started early to allow for some work to be done on the storage.

GGUS 1002244 closed, basepath changed during the downtime.

Coming out of the downtime, observed some issues in the dense servers, this is under investigation. At the moment therefore we are running with reduced slots.