[Beowulf] Supercomputers - iPad versus Cray

Lux, Jim (337C) james.p.lux at jpl.nasa.gov
Thu Mar 8 06:27:15 PST 2012

Of some interest is Jack Dongarra's measurements on the iPad

And his speculation on a cluster.  (wouldn't be a Beowulf: not commodity hardware, not open source OS, etc.)

While it might do the flops, the interconnect bandwidth is quite low. I assume it would have to use WiFi (I don't know how fast the tether port is, but I don't think it's a real ball o'fire.   It's hard to measure.  You can plug a USB disk drive into the photo adapter so maybe your interconnect could simulate that.

From: "Hearns, John" <john.hearns at mclaren.com<mailto:john.hearns at mclaren.com>>
Date: Thu, 8 Mar 2012 05:43:10 -0800
To: "beowulf at beowulf.org<mailto:beowulf at beowulf.org>" <beowulf at beowulf.org<mailto:beowulf at beowulf.org>>
Subject: [Beowulf] Supercomputers - iPad versus Cray


A rather nice Register article on costs for supercomputers, adjusted to 2010  dollars,
And a rather interesting cost per megaflop table on the second page.

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