Slides - Introduction to HPC Workshop

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# Introduction to HPC
## Hands-on workshop

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**p**: toggles **presenter** mode

**c**: creates a **clone** for dual screen

LETS Get excited about High Performance Computing

It's a lot to learn but not that difficult; just quite different to what you might be used to.

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# Digital Research Support

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* ICT, Library and, Digital Research

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* Dropin Session
    * First Tuesday Monthly

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* A **collaboration** between La Trobe ICT, Library and Digital Research team
* We run a dropin session on **first Tuesday of each month** from **Research Commons** area of library; level two at rear

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# Objectives

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1. What is an HPC
2. Loading Software
3. Submitting a job
4. Monitoring jobs
5. Putting it all together

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* Slides for Introduction
* Then self-paced hands-on workshop

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# What is an HPC?

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* Big
* Shared
* Coordinated
* Compute Collection

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* Lots of CPU/Mem
* Many users
* Job Queues/Fair use
* Multiple Computers (Called NODES)

* Describe Figure
	* User TOUCHES pc
	* pc SSHs headnode
	* headnode ALLOCATES JOBS to compute nodes

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# Why use HPCs?

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* Many *CPU*s
* Large *Memory*
* *Efficient* use

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* Lots and Faster
* 10x + a desktop
* Pooled resources: "When A not use B can"

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# Software Modules

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* Packaged
* Loadable
* Versions

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* **Boxed** to avoid **conflicts**
* Must **load** (**blank** to start)
* Multiple versions then available

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# Job Submission

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* SLURM / PBS
* Partition / Queue
* Batch

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* SLURM: Simple Linux Utility for Resource Management
* PBS: Portable Batch System
* Placed in Queue till resources available
	* Aka Partition
* Batch:
	* Not interactive (keyboard,display)
	* May not start immediately
	* Script

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# Resources

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* CPUs
* Memory
* Nodes
* Time

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# Job Type

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* Exclusive
* Shared

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* Exclusive = X node(s)
* Shared = X cpu(s)

* Today use SHARED only

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# Before we start

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* Q/A style
* Incremental Hints
* Think > Hint > Answer

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<div class="showable-container quest showable-hidden" id="showable0">
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			<span class="link-like" id="showablelink0">What is the Answer to Life?</span>
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<div class="showable-container hint showable-hidden" id="showable1">
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		<div class="showable-header hint" id="showabletitle1">
			<a href="#7" id="showablelink1">Hint</a>
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		<div class="showable-body hint" id="showablebody1">
			<p>
				What is the answer to everything?
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			<p>
				As featured in <em>"The Hitchhiker's Guide to the Galaxy"</em>
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			<div class="showable-container showable-hidden" id="showable2">
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						<a href="#7" id="showablelink2">More</a>
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						<p>
							It is probably a two digit number
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<div class="showable-container answer showable-hidden" id="showable3">
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			<a href="#7" id="showablelink3">Answer</a>
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			<p>
				<strong>Answer</strong>: 42
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				Ref: <a href="https://en.wikipedia.org/wiki/42_%28number%29">Number 42 (Wikipedia)</a>
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# Ready, Set, Go

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* Pairs?

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* Pairs: 
	* Recommend, 
	* Alternate *driving* responsibilities
	* Make sure both understand what is happening

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