There are 4 main types of Hyak nodes:

• Login
• Build
• Interactive
• Execute

Each has a different function and different levels of connectivity.

We're guaranteed one node allocation at any given time, some nodes count towards this allocation, some do not.

• Shell prompt looks like [UWNetID@mox2 ~]$
• The first node you encounter upon logging in.
• Access to this node type is user-specific (i.e. only you have access to your login node).
• For file transfers and manipulation.
• This node has internet connectivity.
• Not for running programs, program compiling, or other time/compute power intensive tasks.

• Enter Build node from Login node (specify time needed): srun -p build --time=h:mm:ss --mem=100G --pty /bin/bash
• Shell prompt looks like [UWNetID@nXXXX ~]$. (XXXX will actually be a number)
• For downloading and compiling software from external sources
• This node has internet connectivity
• Not for compute power intensive tasks.
• Access to this node type is granted to all users of the Hyak (mox) system across the entire university.
• A limited number of build nodes are available across all Hyak (mox) users, so there may be a wait to access a build node at times.
• When finished, exit a build node by typing exit and then press the Enter key.

• Shell prompt looks like [UNetID@nXXXX ~]$. (XXXX will actually be a number)
• Enter Interactive node from Login node (specify time needed): srun -p srlab -A srlab --time=h:mm:ss --mem=100G --pty /bin/bash
• For testing, short run/low power tasks, and experimentation
• Access to this node type is limited to the Roberts Lab group, but is limited to a single group member at one time.
• Cannot use Execute node while Interactive node is in use.
• This node does not have internet connectivity.
• Not for compute power or time intensive tasks. Has file size/number limits.
• When finished, exit an interactive node by typing exit and then press the Enter key.

• Runs computing jobs submitted via an sbatch script.
• For execution of large tasks. The "heavy lifting" node.
• No shell prompt
• This node does not have internet connectivity
• Access to this node type is limited to the Roberts Lab group, but is limited to a single group member at one time.
• Cannot use Interactive node while Execute node is in use.
• Creates slurm-job#.out files in working directory specified in sbatch execution script. This contains all standard out output from the program. This can be monitored via cat or tail from a Login node.
• top and other task manager functions can only be accessed after sshing in to the node.