Date: Fri, 18 Jun 1999 06:21:33 +0930 From: Greg Lehey <grog@lemis.com> To: Narvi <narvi@haldjas.folklore.ee> Cc: "David E. Cross" <crossd@cs.rpi.edu>, freebsd-hackers@FreeBSD.ORG Subject: Re: vinum performance Message-ID: <19990618062133.S9893@freebie.lemis.com> In-Reply-To: <Pine.BSF.3.96.990617223526.3570T-100000@haldjas.folklore.ee>; from Narvi on Thu, Jun 17, 1999 at 10:36:49PM %2B0300 References: <19990617174823.O9893@freebie.lemis.com> <Pine.BSF.3.96.990617223526.3570T-100000@haldjas.folklore.ee>
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On Thursday, 17 June 1999 at 22:36:49 +0300, Narvi wrote: > > On Thu, 17 Jun 1999, Greg Lehey wrote: > >> On Thursday, 17 June 1999 at 11:10:08 +0300, Narvi wrote: >>> >>> On Thu, 17 Jun 1999, David E. Cross wrote: >>> >>>> I have a drive that is rated at ~16 Meg/second, and indeed it delivers on the >>>> order of 15+ Meg/second. If I use Vinum to create a concatinated device >>>> of 2 such units performance drops to 2.5 Meg/sec. This seems like a >>>> drastic drop in performance. Any ideas what I am doin incorrectly? >>> >>> Try changing stripe size. How big is it right now? >> >> This was a concatenated plex. > > Do we know that for a fact? I see no reason to doubt what he said. > It could be concatenated by striping. No, the organizations are concatenated, striped or RAID-5. One doesn't mean the other. > And no, i am not sure he was using vinum terminology (and he didn't > say plex anywhere). I don't know any other usage of the word "concatenated" in this connection. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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