GFlops, G-hours, and CPU hours<\/p>\n
1 Flops, GFlops, and TFlops
\n 2 G-hours
\n 3 CPU Hours and CPU Years
\n 4 Credits<\/p>\n
Flops, GFlops, and TFlops<\/p>\n
FLOPS is a standard measure of computing power — “Floating Point Operations Per Second”. A GigaFlop (or Gflop) is a billion FLOPS. A TeraFlps (or TFlop) is a trillion FLOPS.<\/p>\n
So a 1 FLOP machine will do one “operation” in a second. A 1 GFlop machine will do a billion operations in a second. A 2 GFlop machine will do two billion operations in a second. ie, by this measure, a 2 GFlop machine will do twice as much computing work in the same time as a 1 GFlop machine.<\/p>\n
G-hours<\/p>\n
A G-hour is the measure of computing work done by a one GFLOP machine in an hour (i.e., a G-hour is one billion FLOPS per second times 3,600 seconds in an hour which equals 3.6 trillion floating point operations, which is a lot of computing.)<\/p>\n
So in an hour\u2019s work on a volunteer computing project, a machine that operates at one GFLOP will do one G-hour of work; and the same one hour\u2019s contribution on a machine that operates at three GFLOPS (i.e., a faster computer) would complete three G-hours of work.<\/p>\n
CPU Hours and CPU Years<\/p>\n
A CPU is a computer’s processor (“Central Processing Unit”).<\/p>\n
The term CPU Hours (processor hours) is a measure of work done; a CPU Hour is the same as a G-hour, as described above.<\/p>\n
A with G-hours, note that a CPU-hour is is not a direct measure of time. Because some computers are faster than others, CPU Hours are reported in terms of a 1 GFLOP reference machine”. That is, An hour of work on a machine twice as fast as the reference machine is credited as Two CPU Hours.<\/p>\n
A CPU Year is simply the amuont of computing work done by a 1 GFLOP reference machine in a year of dedicated service (8760 hours).<\/p>\n
Credits<\/p>\n
In place of G-hours, CPU Hours or CPU Years, you will in some places see the term Credits.<\/p>\n
One Credit is 1\/100 of a day (14.4 minutes) of computing time on a 1 GFLOP reference machine.<\/p>\n
(Source: gridrepublic.org)<\/p>\n","protected":false},"excerpt":{"rendered":"
GFlops, G-hours, and CPU hours 1 Flops, GFlops, and TFlops 2 G-hours 3 CPU Hours and CPU Years 4 Credits Flops, GFlops, and TFlops FLOPS is a standard measure of computing power — “Floating Point Operations Per Second”. A GigaFlop (or Gflop) is a billion FLOPS. A TeraFlps (or TFlop) is a trillion FLOPS. So […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[11],"class_list":["post-213","post","type-post","status-publish","format-standard","hentry","category-howto","tag-unix"],"_links":{"self":[{"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/posts\/213","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/comments?post=213"}],"version-history":[{"count":1,"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/posts\/213\/revisions"}],"predecessor-version":[{"id":214,"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/posts\/213\/revisions\/214"}],"wp:attachment":[{"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/media?parent=213"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/categories?post=213"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.idoru.be\/notes\/wp-json\/wp\/v2\/tags?post=213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}