Date: Wed, 27 Nov 2013 06:09:47 -0700 From: Eric Browning <ericbrowning@skaggscatholiccenter.org> To: Daniel Kalchev <daniel@digsys.bg> Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: Performance difference between UFS and ZFS with NFS Message-ID: <CAM=5oeDwUUEC2=ZM-K2g-wSy-wE32z5W6LMc%2Bn73DkZOPb6zVQ@mail.gmail.com> In-Reply-To: <5295E2E4.8050506@digsys.bg> References: <2103733116.16923158.1384866769683.JavaMail.root@uoguelph.ca> <9F76D61C-EFEB-44B3-9717-D0795789832D@gmail.com> <CAM=5oeAF2gfccrGNdbApUDpqRae4OQjZ7oaZZi4y1j%2BsF6PsTw@mail.gmail.com> <5969250F-0987-4304-BB95-52C7BAE8D84D@gmail.com> <CAM=5oeBmCAq9unFGC2CBoJ3rZMm9MtDw1DWkFpo2ZqQtx3G%2B=Q@mail.gmail.com> <18391B9C-2FC4-427B-A4B6-1739B3C17498@gmail.com> <CAM=5oeAXiRn2aHvNPuZRPFJp6G45OqdQEDsz2_xGobCUHJp_VQ@mail.gmail.com> <CAM=5oeAybYZsn-TQTvfYO3Kx-chZULeYUEhg9fRMi-CFX0aYBA@mail.gmail.com> <B7C29F362A5045B48BF4CE223E7CE0AD@multiplay.co.uk> <CALfReyfDWTsgXf8JX-eNYOTFdkcYovUf0q=zGQPDUsEUi4nqbw@mail.gmail.com> <CAM=5oeAPG0Vfa-fT1t=Vc8FS_jJGBiR=yq0wuUmEZYLYB%2Br7RA@mail.gmail.com> <DD94A3B19E23453189D4A0C5AB58618A@multiplay.co.uk> <F1C5007B61404180A44CA5719C859EDE@multiplay.co.uk> <CAM=5oeDR3rSmxpffJnTFSkXMxRY0a0gz-NnogoQLhc4ih06gPw@mail.gmail.com> <5295E2E4.8050506@digsys.bg>
next in thread | previous in thread | raw e-mail | index | archive | help
Daniel, I did that on my student server and it was still slow. I was using ZFS v28 at the time with freebsd 9.1 what are you currently using to get these results? On Wed, Nov 27, 2013 at 5:17 AM, Daniel Kalchev <daniel@digsys.bg> wrote: > > On 25.11.13 21:24, Eric Browning wrote: > >> Steven, >> >> I've tried to 4K align these SSDs with gnop but they are currently ashift >> 9. Pool layout is just 4 drives in a zfs stripe. I've also tried raidz1 >> with no noticeable performance impacts other than a loss of space for >> parity. >> >> > ashift=9 with most (all?) SSDs is a big no-no! You really should make that > pool ashift=12 (at least) and have it 4k aligned (partition). > > Especially for writes, an properly aligned 4 drive SSD stripe should be > way faster. > > Here is what I get from ashift=12 raidz1 4 SSD drive pool > > # dd if=/dev/zero of=zero bs=1m count=1k > 1024+0 records in > 1024+0 records out > 1073741824 bytes transferred in 1.817027 secs (590933382 bytes/sec) > > Unfortunately, your only option is dump / recreate pool / restore. (zfs > send/receive is an option too -- especially if you have another set of > drives) > > > Daniel > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" > -- Eric Browning Systems Administrator 801-984-7623 Skaggs Catholic Center Juan Diego Catholic High School Saint John the Baptist Middle Saint John the Baptist Elementary
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAM=5oeDwUUEC2=ZM-K2g-wSy-wE32z5W6LMc%2Bn73DkZOPb6zVQ>