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Login nodes
The login nodes are the primary access points for users to interact with the cluster. They allow users to:
- Connect via SSH to the cluster.
- Prepare and submit jobs to the batch system.
- Manage files and data transfers.
- Compile and debug code.
No running long or resource-intensive computations
Login nodes are not intended for running long or resource-intensive computations. They are designed for light tasks such as job submission, file management, and interactive sessions. Use slurm to submit jobs to compute nodes for heavy computations.
Euler has 50 login nodes, with an Intel Xeon E3 CPU and 32 GB RAM, each.
The login nodes are connected to the batch system, which manages job scheduling and resource allocation across the cluster. When you submit a job, it runs on one of the compute nodes, which are separate from the login nodes.
Accessing the login nodes¶
The login nodes can be accessed via euler.ethz.ch. The load balancer distributes login sessions across the 50 nodes, so you may connect to any of them. This distribution helps balance the load and ensures that no single node becomes overloaded with user sessions.
For an explicit connection to a specific login node, you can use their hostnames, such as eu-login-01.euler.ethz.ch, eu-login-02.euler.ethz.ch, ..., eu-login-50.euler.ethz.ch.
Accessing a particular login node explicitly
Please only access particular login nodes for reattaching screen or tmux sessions. If there is no need to access a particular login node, then please always access Euler through the load balancer euler.ethz.ch