Date: Thu, 12 Nov 1998 18:36:24 -0800 From: Mike Smith <mike@smith.net.au> To: Greg Lehey <grog@lemis.com> Cc: Mike Smith <mike@smith.net.au>, hackers@FreeBSD.ORG Subject: Re: [Vinum] Stupid benchmark: newfsstone Message-ID: <199811130236.SAA02520@dingo.cdrom.com> In-Reply-To: Your message of "Fri, 13 Nov 1998 13:03:49 %2B1030." <19981113130349.N781@freebie.lemis.com>
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> > If you have two drives 4.1GB and two that are 4.3GB, and you want to > > stripe them, you have to use a base size of 4.1GB and throw away 400MB. > > Either that, or you subdivide the disks into multiple partitions > > looking for the largest common submultiple. Yuck. > > That's exactly what we do, except that we don't throw away the rest: > it remains available for other plexes. 400 MB could come in handy > somewhere. You'd write: > > sd drive a length 4100m > sd drive b length 4100m > sd drive c length 4100m > sd drive d length 4100m > > What's the problem? The problem is that it's irrelevant to the matter at hand. I've just said "I want a striped volume across all of these disks". I don't want to futz around with spillage, I just want a striped volume across these disks. Sure, your config tool would put something like the above in the config file (that's what I meant by ignoring bits of the disk), but if the lossage is < 10% I wouldn't bother even emitting a warning message. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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