From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id q0C7V10N229689 for ; Thu, 12 Jan 2012 01:31:02 -0600 Received: from mailsrv14.zmi.at (mailsrv14.zmi.at [212.69.164.54]) by cuda.sgi.com with ESMTP id ht5j0NIb0Fls4MMg for ; Wed, 11 Jan 2012 23:30:59 -0800 (PST) From: Michael Monnerie Subject: Re: sunit/swidth for HP P4500 Lefthand Networks storage arrays Date: Thu, 12 Jan 2012 08:30:56 +0100 References: <4F0E5E73.9070308@hardwarefreak.com> In-Reply-To: <4F0E5E73.9070308@hardwarefreak.com> MIME-Version: 1.0 Message-Id: <201201120830.56858@zmi.at> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0555816455564902313==" Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: stan@hardwarefreak.com Cc: xfs@oss.sgi.com --===============0555816455564902313== Content-Type: multipart/signed; boundary="nextPart4302986.nCAjBBFqPr"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit --nextPart4302986.nCAjBBFqPr Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On Donnerstag, 12. Januar 2012 Stan Hoeppner wrote: > What is the best mkfs.xfs configuration for this scenario? >=20 > I'm guessing it would be best to simply use mostly, if not > completely, the defaults, due to the way iSCSI packets are > redirected on the fly to any storage node depending on load, by the > Lefthand special sauce. I'd use defaults. We've recently switched to a NetApp storage, and with=20 all the specialities it has also use the defaults. > What about mount options? >=20 > Should I use barriers with the P4500s or disable them? > TTBOMK the internal PCIe RAID controllers have BBWC, but the ~6GB of > RAM on the P4500 mobos isn't battery backed, but for the typical > external UPS. In this setup, from a physical hardware standpoint, > iSCSI packets will be making at least 2 ethernet switch hops between > the ESX nodes and the P4500s, with redundant links between > everything, if that's a factor at all. Turn off barriers, I'd say. We use the NetApp over NFS (to VMware=20 stores), and turned them off. I guess that's also correct to do. As I understand them, barriers help to not loose blocks which the=20 storage already received, so it doesn't matter how it's connected=20 because the packets must have arrived there already. Can someone=20 confirm? =2D-=20 mit freundlichen Gr=FCssen, Michael Monnerie, Ing. BSc it-management Internet Services: Prot=E9ger http://proteger.at [gesprochen: Prot-e-schee] Tel: +43 660 / 415 6531 --nextPart4302986.nCAjBBFqPr Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) iEYEABECAAYFAk8OjDAACgkQzhSR9xwSCbSy1ACgr8Y/5G2X/1vf5boQkpY3wZRV 958An2jkcxPUb8Zu84XkKh64F0xsERsJ =p9Zh -----END PGP SIGNATURE----- --nextPart4302986.nCAjBBFqPr-- --===============0555816455564902313== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs --===============0555816455564902313==--