tag:blogger.com,1999:blog-4391199926955637123.post8425779018767894995..comments2024-03-22T06:22:18.127+01:00Comments on Willy Tarreau's stuff: Build farm, version 3 (2018)Willy Tarreauhttp://www.blogger.com/profile/10872713941638092663noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-4391199926955637123.post-25793934645470447082020-10-12T13:15:20.018+02:002020-10-12T13:15:20.018+02:00The S905X3 is an excellent SoC in terms of efficie...The S905X3 is an excellent SoC in terms of efficiency. You can get reasonably decent build performance on a few watts with it. However, like with all low-power chips, you need to have a large project with many small files in order to benefit from such a design. You're getting 72 GHz of A55 cores, that's already quite good. Very often however the DRAM bandwidth in such boxes could be a limiting factor, but with 4 cores that's probably not that much an issue.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-45499325441442962342020-10-12T12:24:34.659+02:002020-10-12T12:24:34.659+02:00I use 20 tv boxes with amlogic S905X3 cpus (1,8Ghz...I use 20 tv boxes with amlogic S905X3 cpus (1,8Ghz quadcores) in one of my towers. Got them for $30 each, 25 units.<br />Replaced the cooling solution with a decent heat sink and each 80mm case fan cooling 4 units.<br />Powered via a 200W usb hub (30 port). Each unit uses between 1W idle, to 2.5-3W under full load. Add 0.5W for the fan (per 4 units), and 0.5W on losses, and theyre sub 4 Watt per unit, doing compite tasks.<br />ProDigithttps://www.blogger.com/profile/17537111536049400038noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-1250381445854420122019-12-04T10:07:39.916+01:002019-12-04T10:07:39.916+01:00This comment has been removed by the author.Tinkleohttps://www.blogger.com/profile/12885283739766581477noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-3578455532547108312019-01-06T17:00:15.995+01:002019-01-06T17:00:15.995+01:00Oh I agree. If I were using this farm for boot tes...Oh I agree. If I were using this farm for boot testing for example, that's definitely one of the options I'd consider. I'd add that nowadays you can even replace the relays with a power MOSFET. I also developed a USB-based watchdog (published somewhere in one of the 2018 articles), that could easily be adapted for this.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-10817966149369539092019-01-06T16:50:57.678+01:002019-01-06T16:50:57.678+01:00I got an arduino with ethernet port controlling a ...I got an arduino with ethernet port controlling a 8-channel relay on my raspi cluster. all raspi's usb power wire is lead through that relay, so i can turn them on and off easily. serial consoles are all connected to the first raspi via a hub.<br />my tests are a bit more destructive, and then the serial console really helps.<br /><br />darkfaderhttps://www.blogger.com/profile/14303314046764820907noreply@blogger.com