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More links and some rewording
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mtrahan41 committed Oct 26, 2018
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Blanca uses a separate instance of the Slurm scheduling system from the other RC compute resources. You can use Blanca’s Slurm instance by loading a special module on a login node: “module load slurm/blanca”.

More details about how to use Slurm can be found [here](https://github.com/ResearchComputing/Research-Computing-User-Tutorials/wiki/Job-Submissions).
More details about how to use Slurm can be found [here](../running-jobs/submission.html).

### QoS

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### Important notes

1. To see what modules are available, start an interactive job on a compute node and use `module avail` or `module spider` on it.
2. /home, /projects, and /work (PetaLibrary Active) are available on all Blanca nodes. Scratch I/O can be written to /rc_scratch, which should offer much better performance than /projects. All Blanca nodes also have at least 850 GB of scratch space on a local disk, /local/scratch. For more info on the different RC storage spaces, please review https://www.colorado.edu/rc/resources/filesystemstorage
2. /home, /projects, and /work (PetaLibrary Active) are available on all Blanca nodes. Scratch I/O can be written to /rc_scratch, which should offer much better performance than /projects. All Blanca nodes also have at least 850 GB of scratch space on a local disk, /local/scratch. For more info on the different RC storage spaces, [please see our page on storage.](https://www.colorado.edu/rc/resources/filesystemstorage)
3. There are no dedicated Blanca compile nodes. To build software that will run on Blanca, start an interactive job on a node like the one on which you expect your jobs to run, and compile your software there. Do not compile on the login nodes!
4. Multi-node MPI jobs that do a lot of inter-process communication do not run well on most Blanca nodes because there is no high-performance low-latency inter-node network except on blanca-ccn.

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