Servers

Servers C&CZ

• linux login servers
• C&CZ administrates the linux cluster nodes for the departments in the beta faculty

Servers ICIS within C&CZ linux cluster

C&CZ does the maintenance for the cluster.

About Linux clusters

Info about linux cluster nodes

• C&CZ info about linux cluster "cn-cluster and other clusters"
• list of nodes within "cn-cluster" with owner specified
• monitoring load on "cn-cluster" nodes
• when logged into a specific clusternode the command "htop" is convenient to see the load on this specific node
• run jobs with Slurm clustersoftware

Policy

• Use the mail alias users-of-icis-servers@science.ru.nl to which you can give notice if you require the machine for a certain time slot (e.g. article deadline, proper benchmarks with no interference of other processes).
• Please create a directory with your username in the scratch directories, so it will not pollute the disk with single files and ownership is clear.
• Please be considerate to other users: please keep the local directories cleaned up, and kill your processes you don't need anymore.
• The automatic monitoring of the servers can be accessed on the web. You can also look at cricket server, only available locally at RU or via VPN, which shows also who is the owner of a cluster node.

Access

For servers which are within the linux cluster managed my C&CZ you must first be granted access to one of the domains cluster-is(for DaS), cluster-ds(for DiS), or cluster-mbsd(for SwS), depending on your section, to be able to login to these machines. Each domain group has access to the full cluster. To get access to a domain group contact the Support_Staff which can arrange this at C&CZ. These domain clusters are only editable and viewable by C&CZ.

When a person is added to one of the domain clusters he/she will also be added to the mailing list users-of-icis-servers@science.ru.nl for the policy as described in previous section. Once added to this mailinglist you can view its contents on dhz.science.ru.nl.

How to run a job on a linux cluster

You can run jobs on the cluster with Slurm cluster software.

Info:

• for a good introduction to Slurm see the Slurm Quickstart documentation
• C&CZ wiki page about Slurm
• Slurm documentation

Administrator details

• iCIS has three domain groups, one per section, to grant people access to the cluster: cluster-is(for DaS), cluster-ds(for DiS), or cluster-mbsd(for SwS)
• access can be granted by contacting one of the scientific programmers
• access is immediately granted to the whole cluster (cn00-cn96.science.ru.nl) however you are only allowed to use the machines you are granted usage to.
• there are two email addresses for the ICIS cluster node machines:
  • users-of-icis-servers@science.ru.nl to which you can give notice if you require the machine for a certain time slot (e.g. article deadline, proper benchmarks with no interference of other processes).
  • icis-servers@science.ru.nl for administrative purposes.

Overview servers

Overview servers for education

contact Kasper Brink