Date: Mon, 12 Oct 1998 06:29:39 -0700 From: Don Lewis <Don.Lewis@tsc.tdk.com> To: Hinrich Eilts <eilts@tor.muc.de>, freebsd-fs@FreeBSD.ORG Subject: Re: filesystem safety and SCSI disk write caching Message-ID: <199810121329.GAA09765@salsa.gv.tsc.tdk.com> In-Reply-To: Hinrich Eilts <eilts@tor.muc.de> "Re: filesystem safety and SCSI disk write caching" (Oct 4, 4:00pm)
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On Oct 4, 4:00pm, Hinrich Eilts wrote: } Subject: Re: filesystem safety and SCSI disk write caching } > I can post (once again) the results of a Novell study on server usage } > patterns. The 30,000 foot view for a typical server breaks down to: } > } > 75% reads } > 15% writes } > 8% directory search operations } > 2% other } } How does this translate to disk usage? I think, VM/buffer cache will } reduce reads and directory search operations quite a lot. I've actually seen some figures quoted for this, but darned if I can figure out where. The numbers I saw showed writes dominating the mix on the other side of the buffer cache. Obviously this will depend on the workload, and I would expect that softupdates would further perturb the numbers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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