Merge pull request #420 from tristan-f-r/docs-parallel

docs: on parallelization and HPC

Author: tristan-f-r

docs/usage.rst

@@ -10,3 +10,21 @@ specifying a ``config.yaml`` and the number of cores to run SPRAS with:
 .. code-block:: bash
 
     snakemake --cores 1 --configfile config.yaml
+
+Parallelizing SPRAS
+-------------------
+
+SPRAS works on any specified number of cores, and will, thanks to Snakemake,
+automatically know how to best distribute work across various cores to
+finish work specified in a configuration as fast as
+possible.
+
+To parallelize SPRAS, specify ``--cores`` to be a value higher than ``1``:
+
+.. code-block:: bash
+
+    snakemake --cores 4 --configfile config.yaml
+
+SPRAS also supports high-performance computing with it's integration with
+`HTCondor <https://htcondor.org/>`_. See :doc:`Running with HTCondor <../htcondor>`
+for more information.