Date: Thu, 31 Jul 2003 09:57:48 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Richard Johannesson <rtjohan@syspres.com> Cc: freebsd-questions@freebsd.org Subject: Re: Mirroring Vinum Volumes - importance of subdisk sequence on mirrordevice Message-ID: <20030731002748.GT33447@wantadilla.lemis.com> In-Reply-To: <004a01c356df$252e6880$3d01a8c0@rjc800> References: <004301c356dc$76e9e620$3d01a8c0@rjc800> <004a01c356df$252e6880$3d01a8c0@rjc800>
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--b2ktwntdbf0dPnbx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline [Format recovered--see http://www.lemis.com/email/email-format.html] Mutilated quotes, known broken MUA. On Wednesday, 30 July 2003 at 14:11:28 -0700, Richard Johannesson wrote: > On Wednesday, July 30, 2003 1:52 PM, Richard Johannesson wrote: >> Question: >> Is it important that the sequence plexes/sub-disks get created in >> for the primary drive and the mirrored drive be the same? Any >> performance penalty? I assume you're asking whether each drive needs the same content. No, that would be ridiculously restrictive. >> I'm guessing that a different sub-disk creation order will put the >> sub- disks in different places on a disk. You don't need to guess: it's described in the man page. >> Background - if needed: Have 10 vinum volumes being mapped by 10 >> plexes to the root drive. >> >> To get mirroring, I created plexes/sub-disks for swap, root, and >> usr using the specific offsets for each on the 2nd hdd device and >> map them back to their specific volumes they should be mirroring. >> >> When I start creating the other plexes/sub-disks on the 2nd hdd and >> map them back to the volume already setup, I won't be using >> specific offsets. > > It seems dumpconfig provides absolute settings of the > subdisks. Might as well use those offsets just in case it matters. I'm not sure what you mean here. dumpconfig is for dumping configuration information. "list" gives information about objects. Greg -- When replying to this message, please copy the original recipients. If you don't, I may ignore the reply or reply to the original recipients. For more information, see http://www.lemis.com/questions.html See complete headers for address and phone numbers --b2ktwntdbf0dPnbx Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iD8DBQE/KGKEIubykFB6QiMRAtBbAJ4mGNP62C/EtYYbsOIV2n5+7a2SdgCdGSZf p0U6efgl0O37sk9EYwPgcOg= =Mvfs -----END PGP SIGNATURE----- --b2ktwntdbf0dPnbx--
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