W dniu sobota, 3 września 2016 14:19:52 UTC+2 użytkownik Andrew David Wong napisał: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > On 2016-09-03 05:15, grzegorz.chodzi...@gmail.com wrote: > > W dniu sobota, 3 września 2016 14:11:04 UTC+2 użytkownik Andrew > > David Wong napisał: > >> > >> On 2016-09-03 04:58, grzegorz.chodzi...@gmail.com wrote: > >>> W dniu sobota, 3 września 2016 13:37:27 UTC+2 użytkownik pixel > >>> fairy napisał: > >>>> On Saturday, September 3, 2016 at 2:32:54 AM UTC-7, > >>>> grzegorz....@gmail.com wrote: > >>>>> I know that QubesOS is developed mostly with notebook use > >>>>> in mind, however some users, me included, opt to run it on > >>>>> desktop computers. The question is, is there any > >>>>> advantage of building a Qubes-dedicated machine on > >>>>> workstation/server components? > >>>> > >>>> mostly ecc ram. its a shame non-ecc is so prevalent. in > >>>> practice, i dont think the difference is worth it. there are > >>>> many more important variables. > >>>> > >>>>> Will Qubes be able to take advantage of higher core count > >>>>> in Xeon processors? Or two processors if a user decides to > >>>>> build a dual-CPU rig? Does the system performance scale > >>>>> with the number of available cores/ clock speed? > >>>> > >>>> yes. > >>>> > >>>>> Can it take advantage of ECC RAM? Server hardware that is > >>>>> few years old can be bought for dirt cheap (Xeon E5-2670 > >>>>> has 8 cores and costs about 75$). > >>>> > >>>> it will benefit the same as any another machine from ecc > >>>> ram. > >>>> > >>>>> I'll be upgrading from my current PC and I'm seriously > >>>>> considering building a rig around a Xeon processor and a > >>>>> motherboard with ECC RAM but if there is no real benefit > >>>>> then what's the point? > >>>> > >>>> apparently price is the advantage, but think of your ears! > >>>> server hardware is loud. > >>>> > >>>> if your willing to spend more on good hardware, go for a good > >>>> ssd, and good ddr4 ram (G.Skill or Geil) in case bitflipping > >>>> attacks start showing up. > >>>> > >>>> http://news.softpedia.com/news/rowhammer-attack-now-works-on-ddr4-m > >>>> > >>>> > >>>> > >>> Xeon it is then. As for the rowhammering attack as far as I > >>> know ECC RAM is not vulnereable to that. > >> > >> Unfortunately, that's not true: > >> > >> "Tests show that simple ECC solutions, providing single-error > >> correction and double-error detection (SECDED) capabilities, are > >> not able to correct or detect all observed disturbance errors > >> because some of them include more than two flipped bits per > >> memory word." > >> > >> https://en.wikipedia.org/wiki/Row_hammer#Mitigation > >> > > Back to the drawing board it is then. What other precautions can > > we take to mitigate this? > > > > You may want to test memory (by hammering it and checking for bit > flips) or rely on the test results others have reported: > > <https://groups.google.com/d/topic/rowhammer-discuss/i1zya99LC1U/discuss > ion> > > - -- > Andrew David Wong (Axon) > Community Manager, Qubes OS > https://www.qubes-os.org > -----BEGIN PGP SIGNATURE----- > > iQIcBAEBCgAGBQJXyr/cAAoJENtN07w5UDAwGT8P+wX1ilw/t6oeq3KpcT2Zr4p5 > nCs+Qyl0ntn89QAtGxTcpYYsTSHZ3Iw6F3ovWJEtDcwFCC/i86Cgnp+VB9VZWKfk > tDt+3x3fUyFQ6I1wGIxjjvbVNmYFUo+cbMjQK2Y0OHfF2j+0zWJ/Nqaue2oems8O > EXPWAdt1KHkm5VlwqaKNjmuPKrJUlNw4ha90nQXNvtf5U9UDOmFnjrh19/PacZgH > Bk7Y2XUjxKHqaBAa6dv+fkH1x37LxeNmmUiyyLze6o5hNlhECeMjSxlLKbyE7asC > mrCemmsGEIuEbuiNTHZrRTJaViTT5EyccJQX708iiEwiEz5zVS3KwBLSHMMaaMBs > Aquld1b42OPezUTOCtTuSU/+oCCZJpqbWb3VB5GK/eLvYFoa2h4rD8E89Lwa4kNQ > vpz7AbZFn4YmVBfQ8rrS7qpay8JgRGChQM75pOSDlZzk8nf3uhYywlg+T1VlT6fL > RTQdzGLn67HBNdD7xIcd1utbLxNXSXfS+5FNMaBeZe3out96+jsNAwZADAkaNU6R > b1xNUSdZQSZ+j8j6w6b5EA7ddg6mH47BKcSMS0x4KP43xrHAP4maH1LCEVcaTJRK > P6kJzOvxrOhxVe5mtewzlRoXLDV1iyoJtlZA+So4ASyfi/ijRo1aZP90Yzwcsu/d > Ilpt015m7KVmu4KVzpmA > =nxuo > -----END PGP SIGNATURE-----
What about Xeon processors? Any other caveats I should know about before I buy one of these? -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/5fa21e34-c0c9-4bfa-83cc-10eab4e231b6%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
