Date: Thu, 22 Jun 2017 00:23:27 +0800 From: Jov <amutu@amutu.com> To: Tim Daneliuk <tundra@tundraware.com> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: FreeBSD and Linux SSD Write Speeds Message-ID: <CADyrUxMkV5sRgQBzZ2_KwyaNKPULmcCJP0L4EA2oJz8CpUqSbw@mail.gmail.com> In-Reply-To: <45657887-638e-bb6d-c318-7046fdea1ca6@tundraware.com> References: <45657887-638e-bb6d-c318-7046fdea1ca6@tundraware.com>
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Try add sync option to dd and write twice of memory size data(16gb for your hw). Jov 2017=E5=B9=B46=E6=9C=8822=E6=97=A5 12:04 AM=EF=BC=8C"Tim Daneliuk" <tundra@= tundraware.com>=E5=86=99=E9=81=93=EF=BC=9A Disclaimer: Tests below run on lightly loaded systems, but results are ... surprising: Test Case: dd if=3D/dev/zero of=3Dfoo bs=3D8M count=3D512 Linux 4.4.0-21-generic on a 2.66GHz Core2 Duo w/8GB memory, older OCZ SSD/ext4: 310MB/sec writes FreeBSD 10-STABLE on an 3.2 GHz Quad Core i5 w/8GB memory, newer Kingston SSD/ufs: 210MB/sec writes Results are repeatable. So, what is the likely culprit making FreeBSD 1/3 slower? The FreeBSD system does does / nfs exported (which I don't quite yet understand since all the nfs mount points are below it) at the moment, but there is little or no nfs traffic. _______________________________________________ freebsd-questions@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org= "
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