[Beowulf] Digital Image Processing via HPC/Cluster/Beowulf - Basics

CJ O'Reilly supaiku at gmail.com
Sat Nov 3 07:12:03 PDT 2012

Thank you very much!
I'll be sure to talk to the software developer about this.
For now this project is moving slowly; still doing research (it's possible
simply a single powerful computer could get this work done feasibly...)
Perhaps I'll be back around in the future though!

Thanks a bundle:)

On Sat, Nov 3, 2012 at 9:50 PM, Lux, Jim (337C) <james.p.lux at jpl.nasa.gov>wrote:

>    1. Yes and no..  The application process needs to be "parallel aware",
>    but for some applications that could just mean running multiple instances,
>    one on each node, and farming the work out to them. This is called
>    "embarassingly parallel" (EP).. A good example would be rendering animation
>    frames.  Typically each frame doesn't depend on the frames around it so you
>    can just parcel the work at a frame granularity to the nodes.    There are
>    other applications which are more tightly coupled and where the computation
>    process running on node N needs to know something about what's running on
>    Node N+1 and Node N-1 very frequently.   For this, applications use some
>    sort of standardized process communication library (e.g. MPI), or, perhaps
>    a library that performs a high level function (e.g. Matrix inversion) that
>    underneath uses the interprocess comm.
> 2.  Another "it depends". If the process is EP, and each node is
> processing a different image, then your problem is one of sending and
> retrieving images, which isn't much different from a conventional file
> server kind of model.  If multiple processors/nodes are working on the same
> image, then the interconnect might be more important.  It all depends on
> the communication requirements.     Note that even EP applications can get
> themselves fouled up in network traffic (imagine booting 1000 nodes
> simultaneously, with them all wanting to fetch the boot image from one
> server simultaneously)
>  This is the place to ask..
>   From: CJ O'Reilly <supaiku at gmail.com>
> Date: Wednesday, October 31, 2012 11:31 PM
> To: "beowulf at beowulf.org" <beowulf at beowulf.org>
> Subject: [Beowulf] Digital Image Processing via HPC/Cluster/Beowulf -
> Basics
>  Hello, I hope that this is a suitable place to ask this, if not, I would
> equally appreciate some advice on where to look in lue of answers to my
> questions:
> You may guess that I'm very new to this subject.
> I am currently researching the feasibility and process of establishing a
> relatively small HPC cluster to speed up the processing of large amounts of
> digital images.
> After looking at a few HPC computing software solutions listed on the
> Wikipedia comparison of cluster software page (
> http://en.wikipedia.org/wiki/Comparison_of_cluster_software ) I still
> have only a rough understanding of how the whole system works.
> I have a few questions:
> 1. Do programs you wish to use via HPC platforms need to be written to
> support HPC, and further, to support specific middleware using parallel
> programming or something like that?
> OR
> Can you run any program on top of the HPC cluster and have it's workload
> effectively distributed? --> How can this be done?
> 2. For something like digital image processing, where a huge amount of
> relatively large images (14MB each) are being processed, will network
> speed, or processing power be more of a limiting factor? Or would a gigabit
> network suffice?
> 3. For a relatively easy HPC platform what would you recommend?
> Again, I hope this is an ok place to ask such a question, if not please
> help refer me to a more suitable source.

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