Difference between revisions of "Getting Started"

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[[Category:Essentials]]
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Welcome to UF Research Computing! This page is intended to help new clients get started on HiPerGator.
==Getting an account==
 
To get an account at the UF HPC Center, you need to put a request in at our request page. That page is [http://www.hpc.ufl.edu/index.php?body=authuser located here].
 
==Logging In==
 
To login to the cluster, you need an SSH client of some sort. If you are using a linux or unix based system, there is most likely one already available to you in a shell, and you can get to your account very quickly.
 
  
If you are having problems connecting to your account, please let the HPC Staff know by submitting a [http://bugzilla.hpc.ufl.edu Bugzilla Request].
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Note that new users are highly encouraged to take the [[New_user_training|New User Training]] course to familiarize themselves with using a supercomputer for research, save time, and avoid many beginner mistakes.
===Linux / Unix===
 
So, here is how you would go about logging in via a linux or unix account:
 
{|
 
|
 
<pre>
 
test@puppy:~$ ssh test@submit.hpc.ufl.edu
 
test@submit.hpc.ufl.edu's password:
 
Last login: Fri Feb  9 00:03:38 2007 from wsip-70-168-187-166.ga.at.cox.net
 
[test@submit ~]$
 
</pre>
 
|}
 
The command <code>ssh test@submit.hpc.ufl.edu</code> is what you would type in at a command prompt on your system. After this, it asks you for a password, which you type in. After that, you are logged in and ready to work.
 
  
===Windows===
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=Introduction to Using HiPerGator=
For Microsoft Windows, things are a bit trickier. Windows does not come with a built-in SSH client, and this makes things difficult. What you have to do is download a client from the Internet and install it, then use that client. We recommend the following:
 
* For a shell client, [http://www.chiark.greenend.org.uk/~sgtatham/putty Putty]
 
* For a file transfer client, [http://winscp.net/eng/index.php WinSCP]
 
Both of the above clients have documentation at their websites, so I will not go into it here. Once you are logged in and have a prompt that resembles that in the Unix / Linux section above, you can continue with this tutorial.
 
  
==Looking Around==
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To use HiPerGator or HiPerGator-AI you need 4 basic parts, learn about them below!
We expect the users of the HPC Center cluster to already have a working knowledge of the linux operating system, so we are not going to go into detail here on using the operating system. Below are some links to webpages that describe a lot of this, however:
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<div style = 'text-align: center;'>
* [http://www.tutorialized.com/tutorial/Basic-Linux-Shell-commands/21596 Basic Linux Shell Commands]
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[[Image:Interface.png|frameless|upright=1| link=HPG Interfaces]]
===File System===
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[[Image:Computation.png|frameless|upright=1|link=HPG Computation]]
We have a structured file system that is important to know about. Please read about it here: [[HPC File System]]
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[[Image:Scheduling.png|frameless|upright=1|link=HPG Scheduling]]
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[[Image:Storage.png|frameless|upright=1|link=HPG Data Management]]
 +
</div>
 +
==From Zero to HiPerGator==
 +
===Initial Consult===
 +
If a face-to-face discussion about the group's needs is needed you can [https://www.rc.ufl.edu/get-support/walk-in-support/ meet one of the UF Research Computing Facilitators] face-to-face or virtually or [https://support.rc.ufl.edu/ submit a support request to start the conversation].  
  
==Editing==
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===HiPerGator Accounts===
Editing files on the cluster can be done through a couple of different methods...
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Group's sponsor has to be the first person to [https://www.rc.ufl.edu/access/account-request/ request a HiPerGator account] indicating that they are a new sponsor. In the process we will create their sponsored group.
===In-System Editors===
 
* vi - vi is the basic editor for a number of people. Using the editor is not necessarily intuitive, so we have provided a link to a tutorial.
 
** [http://www.eng.hawaii.edu/Tutor/vi.html VI Tutorial]
 
* emacs - emacs is a much heavier duty editor, but again has the problem of having commands that are non-intuitive. Again, we have provided a link to a tutorial for this editor.
 
** [http://www2.lib.uchicago.edu/~keith//tcl-course/emacs-tutorial.html Emacs Tutorial]
 
===External Editors===
 
You can also use your favorite editor on your local machine and then transfer the files over to the HPC Cluster afterwards. One caveat to this is that with files created on Windows machines, very often extra characters get injected into text files which can cause major problems when it comes time to interpret the files. If this happens, there is a utility called <code>dos2unix</code> that you can use to remove the extra characters.
 
  
==Running Jobs==
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Afterwards, group members will be able to [https://www.rc.ufl.edu/access/account-request/ submit HiPerGator account requests] indicating their PI as the sponsor. Once approved, their linux accounts will be created.
===General Scheduling===
 
Jobs from faculty investors in the HPC Center are now favored over jobs from groups who did not invest in the HPC Center.
 
  
Job scheduling has been a big topic with the HPC committee in the last several months. The HPC Center staff has been directed by the committee to improve the quality of service of job scheduling for jobs coming from investors in the HPC Center.  This means reducing the time spent in the queues and allowing jobs from the investors to capture the full share of the resources that they have paid for.  The HPC committee recently adopted a document which spells out what they want.
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===Trial Allocation===
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We recommend that the group's sponsor [https://gravity.rc.ufl.edu/access/request-trial-allocation/ request a '''free''' trial allocation] for storage and computational resources to get the group started on HiPerGator. Group members can then use HiPerGator for the 3 month duration of the trial allocation to figure out what resources and applications they really need.
  
One of the results of recent scheduling changes made to Maui in iogw2 was to enable preemption.  When Maui decides it wants to run a job from an investor group, it will preempt jobs non-investors in order to run it.  The preemption policy is currently set to suspend jobs that are preempted.
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===Purchasing Resources===
===PBS Pro Scheduler===
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After or while the group uses a trial allocation to determine the computational and storage resources it needs the group's sponsor can submit a purchase request for [https://gravity.rc.ufl.edu/access/purchase-request/hpg-hardware/ hardware (5-years)] or [https://gravity.rc.ufl.edu/access/purchase-request/hpg-service/ services (3-months to longer)] to invest into the resources to cover the group's HiPerGator use.
Check out [[Job Submission Queues]] for more information
 
  
===Torque Scheduler===
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Some groups may have access to shared departmental allocations. In this case, instead of purchasing resources, group members can [https://support.rc.ufl.edu/ request] to be added to the departmental group to gain access to the shared resources.  
The [http://www.clusterresources.com/pages/products/torque-resource-manager.php Torque Resource Manager] has been installed on the HPC cluster, and is slowly being switched over to from the PBS Pro scheduler as time goes on. The [[Maui]] scheduler is also running in this environment.
 
  
The Torque scheduler is installed on <code>iogw2.hpc.ufl.edu</code>, and accepts the same commands as the PBS Pro scheduler with a couple of exceptions. Currently we are experimenting with these packages so that we can provide improved scheduling to HPC users. While we are still learning about Torque and [[Maui]], our experiences so far have been good and we are guardedly optimistic that Torque and Maui will end up being the resource manager and scheduler for the HPC Center sometime in the not-too-distant future.
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Some examples of departments with shared allocations include the [http://ufgi.ufl.edu/ Genetics Institute], [http://epi.ufl.edu/ Emerging Pathogens Institute], [https://stat.ufl.edu/ Statistics Department], [http://biostat.ufl.edu/ Biostatistics Department], [https://www.eng.ufl.edu/ccmt/ Center for Compressible Multiphase Turbulence (CCMT)], [https://chp.phhp.ufl.edu/research/affiliated-centers/center-for-cognitive-aging-memory-cam/ Cognitive Aging and Memory Clinical Translational Research Program (CAMCTRP)], [https://efrc.ufl.edu/ Center for Molecular Magnetic Quantum Materials], [https://www.phys.ufl.edu/ Physics Department], and [https://plantpath.ifas.ufl.edu/ Plant Pathology Department]. In addition, several research groups working on collaborative projects have shared allocations accessible to members of those projects.
  
Please note the following.
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'''At this point a group is established on HiPerGator and can continue their computational work. See below for more details on the basic use.'''
  
* If your job is single-threaded (1 cpu) and does not have heavy I/O requirements, it does not need to run on an infiniband-enabled node.  In that case, you should include the "gige" property in your PBS resource specification as follows
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==Getting help==
<pre>
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If you are having problems using the UFRC system, try our resources at [https://help.rc.ufl.edu/doc/Category:Help Help] or let our staff know by submitting a [http://support.rc.ufl.edu support request].
#PBS  -l nodes=1:ppn=1:gige
 
</pre>
 
* If you need to run an mpi-based application that has not been rebuilt for OpenMPI 1.2.0+Torque, please send us a note and we'll be happy to rebuild  what you need - first come, first serve.
 
* If you build your own MPI-based application executables, you should use the MPI compiler wrappers (mpif90, mpicc, mpiCC) in /opt/intel/ompi/1.2.0/bin.  These wrappers will automatically pull in the correct libraries.
 
* We will continue to tune the maui scheduler to provide fair and efficient scheduling according to the policies established by the HPC Committee and within the capabilities of the maui scheduler.    Keep in mind that these policies include priority and quality-of-service commitments to those faculty who have invested in the resources within the HPC Center.
 
 
 
====Altix====
 
The Altix is known to the Torque batch system, but not to PBSPro. To submit jobs to the Altix via the batch system, you will have to log into the host ''iogw2.hpc.ufl.edu'' and submit your jobs from there.
 
====Trivial Example Submission Script====
 
{|
 
|-valign="top"
 
|
 
<pre>
 
#! /bin/sh
 
#PBS -N testjob
 
#PBS -o testjob.out
 
#PBS -e testjob.err
 
#PBS -M mxcheng@ufl.edu
 
#PBS -l walltime=00:01:00
 
#PBS -l nodes=1:ppn=1
 
 
 
date
 
hostname
 
</pre>
 
||
 
To submit this job from [[submit.hpc.ufl.edu]], you would use the following command:
 
<pre>
 
$ qsub submit@iogw2 <your job script>
 
</pre>
 
|}
 

Revision as of 19:28, 15 April 2023


Welcome to UF Research Computing! This page is intended to help new clients get started on HiPerGator.

Note that new users are highly encouraged to take the New User Training course to familiarize themselves with using a supercomputer for research, save time, and avoid many beginner mistakes.

Introduction to Using HiPerGator

To use HiPerGator or HiPerGator-AI you need 4 basic parts, learn about them below!

Interface.png Computation.png Scheduling.png Storage.png

From Zero to HiPerGator

Initial Consult

If a face-to-face discussion about the group's needs is needed you can meet one of the UF Research Computing Facilitators face-to-face or virtually or submit a support request to start the conversation.

HiPerGator Accounts

Group's sponsor has to be the first person to request a HiPerGator account indicating that they are a new sponsor. In the process we will create their sponsored group.

Afterwards, group members will be able to submit HiPerGator account requests indicating their PI as the sponsor. Once approved, their linux accounts will be created.

Trial Allocation

We recommend that the group's sponsor request a free trial allocation for storage and computational resources to get the group started on HiPerGator. Group members can then use HiPerGator for the 3 month duration of the trial allocation to figure out what resources and applications they really need.

Purchasing Resources

After or while the group uses a trial allocation to determine the computational and storage resources it needs the group's sponsor can submit a purchase request for hardware (5-years) or services (3-months to longer) to invest into the resources to cover the group's HiPerGator use.

Some groups may have access to shared departmental allocations. In this case, instead of purchasing resources, group members can request to be added to the departmental group to gain access to the shared resources.

Some examples of departments with shared allocations include the Genetics Institute, Emerging Pathogens Institute, Statistics Department, Biostatistics Department, Center for Compressible Multiphase Turbulence (CCMT), Cognitive Aging and Memory Clinical Translational Research Program (CAMCTRP), Center for Molecular Magnetic Quantum Materials, Physics Department, and Plant Pathology Department. In addition, several research groups working on collaborative projects have shared allocations accessible to members of those projects.

At this point a group is established on HiPerGator and can continue their computational work. See below for more details on the basic use.

Getting help

If you are having problems using the UFRC system, try our resources at Help or let our staff know by submitting a support request.