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= HPC Workshop Fall 2025 =
= Module 2 of 5 - Introduction to Multi-processing =
== Why use a HPC Cluster? ==
* tasks take too long
 * When the task to solve becomes heavy on computations, the operations are typically out-sourced from the local laptop or desktop to elsewhere.  
* one server is not enough
 * If the computational task or analysis to complete is daunting for a single computer, larger agglomerations of servers (computers) are used.

== Parallel Computing ==
* [https://wiki.hpc.tulane.edu/trac/wiki/Workshops/IntroToHpc2015/Programming/SpeedupScaling Overview]

=== Parallel Programming ===
* [[cypress/Programming/OpenMp|OpenMP]] - Simple tutorial of OpenMP parallel codes [[BR]]
* [[cypress/Programming/Mpi|MPI]] - Simple tutorial of MPI parallel codes [[BR]]

=== Multi-threads ===
* In computer architecture, multithreading is the ability of a central processing unit (CPU) (or a single core in a multi-core processor) to provide multiple threads of execution.

== Multi-processing ==


* [[cypress/JobArrays|Job Arrays]]
 * Participation: submit a job array
* [[cypress/JobDependency|Job Dependencies]]
* [[cypress/using#SubmittingInteractiveJobs|Running interactive jobs (idev)]]
* [[cypress/using#MPIJobs|Parallel Jobs : MPI]]
* [[cypress/using#OpenMPJobs|Parallel Jobs : OpenMP]]
* [[cypress/using#HybridJobs|Parallel Jobs : Hybrid]]
* [[cypress/GNUparallel|Gnu Parallel]]
 * Participation: [[https://wiki.hpc.tulane.edu/trac/wiki/cypress/GNUparallel#SingleNode|Single Node Job]]