From owner-freebsd-hardware@FreeBSD.ORG Wed Nov 5 10:58:53 2008 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1861D1065678 for ; Wed, 5 Nov 2008 10:58:53 +0000 (UTC) (envelope-from freebsd-hardware@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id 91B528FC2E for ; Wed, 5 Nov 2008 10:58:52 +0000 (UTC) (envelope-from freebsd-hardware@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1Kxg65-00053H-M1 for freebsd-hardware@freebsd.org; Wed, 05 Nov 2008 10:58:49 +0000 Received: from lara.cc.fer.hr ([161.53.72.113]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 05 Nov 2008 10:58:49 +0000 Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 05 Nov 2008 10:58:49 +0000 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-hardware@freebsd.org From: Ivan Voras Date: Wed, 05 Nov 2008 11:58:51 +0100 Lines: 62 Message-ID: References: <490A782F.9060406@dannysplace.net> <490FE404.2000308@dannysplace.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig44A484ED89D2AD7FC7AB8745" X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr User-Agent: Thunderbird 2.0.0.17 (X11/20080925) In-Reply-To: <490FE404.2000308@dannysplace.net> X-Enigmail-Version: 0.95.0 Sender: news Subject: Re: Areca vs. ZFS performance testing. X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 05 Nov 2008 10:58:53 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig44A484ED89D2AD7FC7AB8745 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Danny Carroll wrote: > - I have seen sustained 130Mb reads from ZFS: > capacity operations bandwidth > pool used avail read write read write > ---------- ----- ----- ----- ----- ----- ----- > bigarray 1.29T 3.25T 1.10K 0 140M 0 > bigarray 1.29T 3.25T 1.00K 0 128M 0 > bigarray 1.29T 3.25T 945 0 118M 0 > bigarray 1.29T 3.25T 1.05K 0 135M 0 > bigarray 1.29T 3.25T 1.01K 0 129M 0 > bigarray 1.29T 3.25T 994 0 124M 0 >=20 > ad4 ad6 ad8 cpu > KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s us ni sy in id > 0.00 0 0.00 65.90 375 24.10 63.74 387 24.08 0 0 19 2 78 > 0.00 0 0.00 66.36 357 23.16 63.93 370 23.11 0 0 23 2 75 > 16.00 0 0.00 64.84 387 24.51 63.79 389 24.20 0 0 23 2 75 > 16.00 2 0.03 68.09 407 27.04 64.98 409 25.98 0 0 28 2 70 > I'm curious if the ~130M figure shown above is bandwidth from the array= > or a total of all the drives. In other words, does it include reading > the parity information? I think it does not since if I look at iostat > figures and add up all of the drives it is greater than that reported b= y > zfs by a factor of 5/4 (100M in Zfs iostat =3D 5 x 25Mb in standard io= stat). The numbers make sense - you have 5 drives in RAID-Z and 4/5ths of total bandwidth is the "real" bandwidth. On the other hand, 25 MB/s is very slow for modern drives (assuming you're doing sequential read/write tests). Are you having hardware problems? > Lastly, The windows client which performed these tests was measuring > local bandwidth at about 30-50Mb/s. I believe this figure to be > incorrect (given how much I transferred in X seconds...) Using Samba? Search the lists for Samba performance advice - the default configuration isn't nearly optimal. --------------enig44A484ED89D2AD7FC7AB8745 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFJEXxsldnAQVacBcgRAqSBAKCgCBQqBG7cgOLBWYVGokCgT9lUNACgm0h2 cp69wbiwPY3e1GqadCeRh9M= =anJL -----END PGP SIGNATURE----- --------------enig44A484ED89D2AD7FC7AB8745--