Date: Sat, 28 Feb 2015 15:51:36 -0700 From: Warner Losh <imp@bsdimp.com> To: Brett Wynkoop <freebsd-arm@wynn.com> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: buildworld Message-ID: <D66857A3-87E2-49A8-B6D7-DDB92E7F6194@bsdimp.com> In-Reply-To: <20150228145504.4a854cf1@ivory.wynn.com> References: <20150228011141.4138dd4b@ivory.wynn.com> <AEF07B70-81C1-44F1-B4EE-CF09D4556C84@gromit.dlib.vt.edu> <20150228145504.4a854cf1@ivory.wynn.com>
next in thread | previous in thread | raw e-mail | index | archive | help
--Apple-Mail=_2E53C336-C36E-4155-87E1-49FB07010FDD Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 So fast SD cards run about 5-10MB/s write speed, a little more read. SSDs are 100x faster than that, typically (300MB/s read, 400MB/s write are typical values). USB 2.0 is 480Mbps or 48MB/s (in practice more like 20-30MB/s), so even a USB attached drive is going to be 6x faster than a fast SD card. Note: I=E2=80=99ve not measured any of these rates from an RPi B, mind you, so YMMV. Slow SD cards can be 10x slower or worse than faster ones. Especially with UFS since it=E2=80=99s a rewrite in place FS. Thumb drives are little better than SD cards here, alas. That=E2=80=99s a long way of saying that a good USB + SSD or USB + HDD would cut your buildworld time substantially. At a guess, by a factor of 4-8 to between 5-10 hours. Good luck with your installworld. Warner > On Feb 28, 2015, at 12:55 PM, Brett Wynkoop <freebsd-arm@wynn.com> = wrote: >=20 >=20 > mv routing_test.tmp routing_test >=20 > -------------------------------------------------------------- >>>> World build completed on Sat Feb 28 06:45:32 EST 2015 > -------------------------------------------------------------- >=20 >=20 > So it took just over 48 hours. It also proves that removing the > make.conf was the right move. Good stuff! >=20 > Now to see if I can installworld without crashing the little box. >=20 > -Brett >=20 > -- >=20 > wynkoop@wynn.com = http://prd4.wynn.com/wynkoop/pgp-keys.txt > 917-642-6925 > 929-272-0000 >=20 > I would never invade the United States. There would be a gun behind > every blade of grass. --Isoroku Yamamoto >=20 > _______________________________________________ > freebsd-arm@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-arm > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org" --Apple-Mail=_2E53C336-C36E-4155-87E1-49FB07010FDD Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJU8kZ4AAoJEGwc0Sh9sBEA/Q0QAKTWWPXDhU2DRl+Ti9qP90u/ ewhrsqJQrLmU73FvEYPWL/xVWNVTWAbE19Ujc1OT4ZwHWURmL35dlddmDkMG/Fhp mnHJ3aB1wCygbNUL+zCB3nDhavWzX7XHuOXpLDYT8vQjOKGzQ/4FsZzMlYHVJ1i8 FjzHqJJTiJZxk+U2InB8bgQnJNbddJaB/ywNBSBg+QtP3xm7/UigtxEyhJGW7gxi 7d61af3llr5OOJ5nmGuVz33xQtMXZcmhNlbvk0LFaTTVbEPW4TlLMgnG+iuQFRzp 8zHaI43+Jj/Kl+tGVdwGGx+yKFvpH2oAA04XCyd1kwnfktetWZQpw7FHqoPfKpHB Rqkwe/ChVZFDuyuO9TuY1SLIVPxDKYlgKzgObEGg9J+Mk07E9TiLMt/k+Sup9Zn/ UUgPSxBYvQ5gKrIJ9Gi6uuEMfa4t6oe6V2+Gjad2uQ4Rw2x57hm4AZ2p/5KK5BIB QSzeO380J03/7WLp32qykYyJSMY9s/tkfs9hrrWqZVAA5bo58taRDqYDM1BzdKHa 5RV7ykafu/NMNzXrnbTruis1VYEvILFSGnlQMV5rZwYzcWHk7lmUdVA03UUjtoHX Iu0zOam1jHARitbcuiBAUlR05cl2jQYtfL9rPoxhwi4I3tapLc1fLmCZolAPor6H gwvwR5YQ1jrCP+cNZnIL =waS5 -----END PGP SIGNATURE----- --Apple-Mail=_2E53C336-C36E-4155-87E1-49FB07010FDD--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?D66857A3-87E2-49A8-B6D7-DDB92E7F6194>