[hashcash] Re: Speed problem with 1.03 on Mac G4
- From: John Honan <jhonan@xxxxxxxxxxxxxxx>
- To: hashcash@xxxxxxxxxxxxx
- Date: Tue, 31 Aug 2004 02:23:52 +0100
Jonathan Morton wrote:
Yes, an Xserve is an impressively compact and powerful piece of kit.
It also happens to cost upwards of $2000, so it's a significant
investment for a spammer to make - it'll raise the bar at least a bit.
But, let's assume the worst-case scenario, which is that a prolific
and thus well-funded spammer has made this investment in a rack of 10
Xserves. In that case, a "limit" of ~900K mails a day is still a
pretty large figure, and is unlikely to affect his operations too
badly. If anything, he might have to charge a little more per message
to remain profitable, but it's still a pretty small cost from the
spammer's client's point of view.
Back to the subject of the G5 and 'high-end minting systems' for a
moment....
The dual-G5 Xserve is about 9 gigaflops, for $2,000. That's $222 per
gigaflop . A company called Orion Multisystems have just announced a
workstation offering between 18 and 36 gigaflops for about $9,000....
Works out at between $250 and $500 per gigaflop. But I wonder what sort
of hashing performance it would give?;
http://www.computerworld.com/hardwaretopics/hardware/story/0,10801,95581,00.html
"But this PC puts out about 18 GFLOPS of sustained performance and 36
GFLOPS of peak performance under certain conditions. Transmeta Corp.'s
90-nanometer Efficeon processors are the reason Orion can pack so much
performance into a relatively small package, Hunter said. Hunter and
Orion vice president of engineering Ed Kelly are very familiar with
Transmeta's chips because they co-founded that company before joining
Orion."
http://www.reuters.com/newsArticle.jhtml?type=technologyNews&storyID=6105683
"<>Orion's DS-96 deskside Cluster Workstation is capable of handling 150
billion calculations per second on a regular basis and up to 300 billion
operations at peak moments. It offers hard disk capacity with up to 9.6
trillion bytes of storage. The cost of the machines is in line with
standard prices for research workstations, officials said. The basic
12-chip model runs around $10,000 and the 96-chip computer costs upward
of $100,000"
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