John, it's anecdotal, but my wife's Macbook
Air boots far faster than a similarly configured Macbook Pro - the difference is
the 4200 rpm laptop disk in the latter vs. the SSD in the former. We also
have a PC at work with a small/expensive SSD that is noticeably faster with
Powerpoint presentations.
This said, I would think that a
careful review of read/write/reread speeds (and seek times) would demonstrate
that SSD should outperform "normal PC/laptop disks". The question is the
vendor and cost for such an SSD... I also wonder whether direct methods
would outperform any external-storage-based method given the staggering speed
difference between chip/cache and I/O pipeline. I would think this
especially important for GPU based codes?
But then,
I've been wrong before :-).
Joe
On Apr 24,
2012, at 5:42 PM, John McKelvey jmmckel[]gmail.com wrote:
Sent to CCL
by: John McKelvey [jmmckel#gmail.com] CCLers
I am looking to buy a
machine sort of specific for running Hartree-Fock and DFT codes. There
is always the issue of cpu speed, but for large systems disk-io can be a
significant issue, even for the usual scratch file. Has anyone done any
direct or reasonable indirect evaluations around this issue?
Many
thanks,
John
-- John McKelvey 10819 Middleford
Pl Ft Wayne, IN
46818 260-489-2160 jmmckel^^^gmail.com
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