Recently we have experienced some issues with nfs filesystems one of the main suspects was the ZFS filesystem having a lack of cache memory on the machine. In order to improve the situation we will install more memory in the servers. This will cause a downtime of about 10-15 minutes per server. We plan to do this before 10:00 or after 16:00 on Monday Oct 27, 2025. Update 27 Oct 2025 The memory upgrade was concluded around 09:15 on Monday 27 Oct.

The ElabFTW server will be upgraded and also moved to another host on Monday October 27th, this will be a little bit more involved than a normal version upgrade, and you can expect some downtime during the move and upgrade. Update: upgrading was done on the old server, moving to the new server ran into some unexpected issues, we will plan a new date for that. Update: move was done on Sunday November 2nd, some users report problems logging in, but that appears to be temporary due to elab running on a different ip address and machine.

On Thursday 23rd we will move the host of the rstudio website and another server to another location. This will cause some downtime, starting from about 9 O’clock and it should be done within 1 hour.

The GitLab registry used by gitlab.science.ru.nl and gitlab.pep.cs.ru.nl is currently unavailable due to a disk failure in the storage backend. The faulty drive is being replaced, after which the registry should be available again.

Due to some cleanup changes, the miii server ended up without the proper firewall rules and account configuration scripts that it was supposed to get. We were able to fix the server eventually, but during the day, users were unable to work until it was fixed.

With the changes in the networks, we are able to optimise some vlan configurations to utilise the high speed link, which was impossible before. The network reconfiguration may need a reboot of the server, but otherwise not too much downtime is expected. The reboot takes about 5-10 minutes if necessary. The list of vm’s affected (only those without redundant functionality are listed): vmhost05: mestrenova143 pagespep pep1 nolaivalkhof mestrenova150 fsecure pep2 pages licensevm1 goudsmit zaaivm stormvogel nolaigoffert desdapi vmhost06: ...

When we moved the gateways of our networks from the old location to the new firewalls, we have received some complaints about NFS filesystems having slowness, longer delays or unavailability. In general NFS should never be a requirement for a clusternode job if you can avoid it, because this I/O is always much slower than local I/O from /scratch. We are investigating how we can optimise the network to resolve this issue, but we are hard pressed to know the exact cause of the problem. We are assuming the root cause might be that, now more traffic is passing through our firewalls, this degrades the performance in some way. ...

A change in the firewall config had the uncalculated effect that ssh-sessions got blocked/dropped. The config has been reversed.

We need to move a server to another location, during the move some of the services are unavailable, including licenses for: Cadence Labview Originlab Cst Maple Server ExelisIdl Mathematica Synopsys Genesys Matlab VirtualMachine GurobiTokenServer Mentorgraphics Xilinx Hdlworks Moe IntelCompiler New Everything should be completed by 10:00.

Due to the gateway change the printing traffic followed a different route which ran into default blockages in the central firewall, after the problem was found a fix was implemented to allow this traffic to the printserver via the new route.