[Beowulf] SSD caching for parallel filesystems
diep at xs4all.nl
Mon Feb 11 11:49:15 PST 2013
On Feb 11, 2013, at 7:29 PM, Lux, Jim (337C) wrote:
>> In any event, your original statement used to be wholly correct.
>> It has
>> changed to a certain degree to "SSDs are about IOPs," which isn't
>> quite the same thing. However, more pointedly, with modern HDDs
>> barely approaching 200MB/s and SSD solutions approaching 2-4GB/s,
>> is an increasingly limited viewpoint. We have to start considering
>> their use for bandwidth.
> Find me an application that needs big bandwidth and doesn't need
> massive storage.
> Digital waveform recording and playback.. e.g. in radar
> simulators. You need very wide bandwidth, but not a huge amount of
> storage (e.g. If I'm playing back a synthetic response to a 1
> millisecond pulse with 2 GHz BW, I only need 10s of Megasamples at
> most, but you need 10 Gsample/second sorts of bandwidth)
> One might thing, heck, just slap a few GByte of RAM in there and be
> done with it, but if you're simulating a radar with 10 different
> pulse types, and you have 10-20 simulated targets each with several
> different viewing aspects, you pretty quickly need a "library" of
> several thousand pulses/returns to choose from.
Yeah well i remember negotiating about writing CUDA code for
simulation software of something similar.
Don't think that this example applies. You want it in RAM for a
proper simulation :)
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