Date: Wed, 21 Jun 2017 12:47:07 -0600 From: JD <jd1008@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: FreeBSD and Linux SSD Write Speeds Message-ID: <594ABF2B.9050509@gmail.com> In-Reply-To: <3a2eabbe-1bef-5c56-f7af-8f054baa87e5@tundraware.com> References: <45657887-638e-bb6d-c318-7046fdea1ca6@tundraware.com> <41839.128.135.52.6.1498062473.squirrel@cosmo.uchicago.edu> <3a2eabbe-1bef-5c56-f7af-8f054baa87e5@tundraware.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 06/21/2017 12:33 PM, Tim Daneliuk wrote: > On 06/21/2017 11:27 AM, Valeri Galtsev wrote: >> sync; date; dd if=/dev/zero of=foo bs=8M count=512; sync; date > So I just did this: > > sync; date; dd if=/dev/zero of=foo bs=8M count=1024; sync; date > > And got this: > > Linux: > > Wed Jun 21 13:30:22 CDT 2017 > 1024+0 records in > 1024+0 records out > 8589934592 bytes (8.6 GB, 8.0 GiB) copied, 33.523 s, 256 MB/s > Wed Jun 21 13:30:57 CDT 2017 > > > FreeBSD: > > Wed Jun 21 13:28:23 CDT 2017 > 1024+0 records in > 1024+0 records out > 8589934592 bytes transferred in 46.508336 secs (184696666 bytes/sec) > Wed Jun 21 13:29:10 CDT 2017 > > So ... still a pretty big disparity > > I don't want to test against a raw device or partition because that's > not how these systems get used. My FreeBSD FS is UFS and maybe that > simply is not as efficient on an SSD as ext4. > > This isn't a big deal, just an eyebrow raiser for me. I've used FreeBSD > as a production OS since 2.x and have always found it to be consistently > quicker and have a smaller footprint than Linux. This was just a surprise. By my prior use of BSD and after that FreeBSD, the UFS was never a shining star of disk I/O speeds.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?594ABF2B.9050509>