[General] Any linux gurus?

Sun Dec 15 19:25:40 CST 2013

If you wish, but I was thinking hopes and dreams.
On Dec 15, 2013 7:24 PM, "WebDawg" <webdawg at gmail.com> wrote:

> Can we make them heavier?
>
> Possibly Sulfur Hexafluoride?
>
>
>
> On Sun, Dec 15, 2013 at 3:20 PM, Barbara Attilio
> <barbara.attili at gmail.com> wrote:
> > What , you think I'm made of money? Also, rainbow balloons. Maybe 3. One
> > half deflated out of spite.
> >
> > On Dec 15, 2013 7:16 PM, "Erik Arendall" <earendall at gmail.com> wrote:
> >>
> >> 99 luftballoons?
> >>
> >> On Dec 15, 2013 6:55 PM, "Barbara Attilio" <barbara.attili at gmail.com>
> >> wrote:
> >>>
> >>> I can bring balloons!
> >>>
> >>> On Dec 15, 2013 6:53 PM, "enabrintain at yahoo.com" <
> enabrintain at yahoo.com>
> >>> wrote:
> >>>>
> >>>> I want a cookie cake!
> >>>>
> >>>> Sent from my Verizon Wireless 4G LTE DROID
> >>>>
> >>>>
> >>>> Justin Richards <ratmandu at gmail.com> wrote:
> >>>>
> >>>> Woohoo!
> >>>>
> >>>> On Dec 15, 2013 6:48 PM, "Kyle Centers" <kylecenters at gmail.com>
> wrote:
> >>>>>
> >>>>> Jeff Cotten says if this thread gets to 50 messages, he'll throw a
> >>>>> party. So. This is my contribution?
> >>>>>
> >>>>> On Dec 15, 2013 5:37 PM, "James Fluhler" <j.fluhler at gmail.com>
> wrote:
> >>>>>>
> >>>>>> Thanks for the link I will check it out!
> >>>>>>
> >>>>>> James F.
> >>>>>>
> >>>>>> On Dec 15, 2013, at 4:04 PM, Stephan Henning <shenning at gmail.com>
> >>>>>> wrote:
> >>>>>>
> >>>>>> -WD
> >>>>>>
> >>>>>> I'll check the arrays and see what they are currently formatted as,
> >>>>>> it's not a big deal to reformat one of these arrays, so that
> something that
> >>>>>> can be changed quick and easy.
> >>>>>>
> >>>>>> Eh, I'm not involved in the development, but I'll bring it up and if
> >>>>>> it is something that hasn't been considered I'll put some pressure
> on them
> >>>>>> to look into it.
> >>>>>>
> >>>>>>
> >>>>>> -James
> >>>>>> http://www.ierustech.com/product/v-lox/
> >>>>>>
> >>>>>> It's internally built, just got rolled out to market.
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> On Sun, Dec 15, 2013 at 2:04 PM, James Fluhler <j.fluhler at gmail.com
> >
> >>>>>> wrote:
> >>>>>>>
> >>>>>>> I have not heard of VLOX before and a quick google search turned up
> >>>>>>> nothing? Is it commercially available or internally built? I've
> typically
> >>>>>>> used NEC, GEMS, EMDS, and Genesys, for eMag simulation work.
> >>>>>>>
> >>>>>>> Just curious but where do you work haha
> >>>>>>>
> >>>>>>> James F.
> >>>>>>>
> >>>>>>> On Dec 13, 2013, at 11:13 AM, Stephan Henning <shenning at gmail.com>
> >>>>>>> wrote:
> >>>>>>>
> >>>>>>> Method of Moment, Computational ElectroMagnertics.
> >>>>>>>
> >>>>>>> Program is called Vlox
> >>>>>>>
> >>>>>>>
> >>>>>>> On Fri, Dec 13, 2013 at 10:47 AM, David <ainut at knology.net> wrote:
> >>>>>>>>
> >>>>>>>> MoM CEM vlox -- could you expand those acronyms, please?  Is this
> a
> >>>>>>>> logistics planning tool?
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> Stephan Henning wrote:
> >>>>>>>>
> >>>>>>>> -David
> >>>>>>>>
> >>>>>>>> Hmm, sounds interesting. The problem is distributed a little
> >>>>>>>> currently, you can think of it kind of what is being done as a
> form of monte
> >>>>>>>> carlo, so the same run will get repeated many times with light
> parameter
> >>>>>>>> adjustments. Each of these can be distributed out to the compute
> nodes very
> >>>>>>>> easily, currently this is being done with condor.
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> -James
> >>>>>>>>
> >>>>>>>> It's a MoM CEM tool called vlox.
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> On Fri, Dec 13, 2013 at 5:43 AM, James Fluhler <
> j.fluhler at gmail.com>
> >>>>>>>> wrote:
> >>>>>>>>>
> >>>>>>>>> I'm just curious what simulation program are you running? I've
> used
> >>>>>>>>> a number in the past that also utilize the GPU's for processing.
> >>>>>>>>>
> >>>>>>>>> James F.
> >>>>>>>>>
> >>>>>>>>> On Dec 12, 2013, at 11:28 PM, David <ainut at knology.net> wrote:
> >>>>>>>>>
> >>>>>>>>> IIRC, the good thing about this cluster is the automagic load
> >>>>>>>>> leveling.  Your existing binary may not run at max optimization
> but if the
> >>>>>>>>> task can be spread among processors, Beowulf does a nice job of
> it.  If each
> >>>>>>>>> computer has it's own GPU(s), then all the better.
> >>>>>>>>>
> >>>>>>>>> You can test it right there without changing anything on the
> >>>>>>>>> system's disks.  Just create and run all the cluster members off
> a CD.
> >>>>>>>>>
> >>>>>>>>> Then to test, pick the fastest one of them (maybe even your
> >>>>>>>>> existing Xeon box), run your benchmark, record execution time,
> then boot all
> >>>>>>>>> the other machines in the cluster and run it again.  There are
> only about
> >>>>>>>>> two dozen steps to set it up.  One professor even put most of
> those, along
> >>>>>>>>> with automatic cluster setup(!) as a downloadable you can boot
> off of.  That
> >>>>>>>>> leaves half a dozen steps to tweak the cluster together, then
> you're good to
> >>>>>>>>> go.  I have one of those CD's around here somewhere and I can
> get details if
> >>>>>>>>> you're interested.  Something to play with.  I did it with only
> 4 pc's
> >>>>>>>>> around the house with some code and even though the code was
> never designed
> >>>>>>>>> for a cluster (just multiprocessing), I got about 40% decrease
> in execution
> >>>>>>>>> time.  The code was almost completely linear execution so I'm
> surprised it
> >>>>>>>>> got any improvement but it did.
> >>>>>>>>>
> >>>>>>>>> David
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> Stephan Henning wrote:
> >>>>>>>>>
> >>>>>>>>> -WD
> >>>>>>>>>
> >>>>>>>>> I believe it's either ext3 or ext4, I'd have to ssh in and check
> >>>>>>>>> when I get back on Monday.
> >>>>>>>>>
> >>>>>>>>> -David
> >>>>>>>>>
> >>>>>>>>> I'll check into the Beowulf and see what that would entail. I'll
> >>>>>>>>> try and talk with the developer and see what their thoughts are
> on the
> >>>>>>>>> feasibility of running it on a cluster. They may have already
> gone down this
> >>>>>>>>> path and rejected it, but I'll check anyway.
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> On Thu, Dec 12, 2013 at 6:16 PM, David <ainut at knology.net>
> wrote:
> >>>>>>>>>>
> >>>>>>>>>> Sounds like a perfect candidate for a Beowulf cluster to me.
> >>>>>>>>>> There are possibly some gotcha's but you'll have the same
> problems with just
> >>>>>>>>>> a single computer.
> >>>>>>>>>>
> >>>>>>>>>> Velly intewesting.
> >>>>>>>>>>
> >>>>>>>>>> Stephan Henning wrote:
> >>>>>>>>>>>
> >>>>>>>>>>> -WD
> >>>>>>>>>>>
> >>>>>>>>>>> The GPUs are sent data in chunks that they then process and
> >>>>>>>>>>> return. The time it takes a GPU to process a chunk can vary,
> so I assume the
> >>>>>>>>>>> bottle necks we were seeing was when several of the GPU cores
> would finish
> >>>>>>>>>>> at about the same time and request a new chunk and the chunk
> they needed
> >>>>>>>>>>> wasn't already in RAM, so the drive array would take a heavy
> hit.
> >>>>>>>>>>>
> >>>>>>>>>>> Beyond that, I can't really give you a numerical value as to
> the
> >>>>>>>>>>> amount of data they are dumping into the pcie bus.
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>> -David
> >>>>>>>>>>>
> >>>>>>>>>>> Ya, not sure an FPGA exists large enough for this, it would be
> >>>>>>>>>>> interesting though.
> >>>>>>>>>>>
> >>>>>>>>>>> While the process isn't entirely sequential, data previously
> >>>>>>>>>>> processed is reused in the processing of other data, so that
> has kept us
> >>>>>>>>>>> away from trying a cluster approach.
> >>>>>>>>>>>
> >>>>>>>>>>> Depending on the problem, anywhere from minutes per iteration,
> to
> >>>>>>>>>>> weeks per iteration. The weeks long problems are sitting at
> about 3TB I
> >>>>>>>>>>> believe. We've only run benchmark problems on the SSDs up till
> now, so we
> >>>>>>>>>>> haven't had the experience of seeing how they react once they
> start really
> >>>>>>>>>>> getting full.
> >>>>>>>>>>>
> >>>>>>>>>>> Sadly, 2TB of RAM would not be enough. I looked into this Dell
> >>>>>>>>>>> box
> >>>>>>>>>>> (
> http://www8.hp.com/us/en/products/proliant-servers/product-detail.html?oid=4231377#!tab=features
> >>>>>>>>>>> <
> http://www8.hp.com/us/en/products/proliant-servers/product-detail.html?oid=4231377#%21tab=features
> >)
> >>>>>>>>>>> that would take 4TB, but the costs were insane and it can't
> support enough
> >>>>>>>>>>> GPUs to actually do anything with the RAM...
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>> <<<snip>>>
> >>>>>>>>>>
> >>>>>>>>>>
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