Date: Tue, 18 Nov 1997 04:32:24 -0500 (EST) From: "John S. Dyson" <toor@dyson.iquest.net> To: reyesf@super.zippo.com Cc: hackers@FreeBSD.ORG Subject: Re: Optimizing HD I/O. What size to use to read/write? Message-ID: <199711180932.EAA01115@dyson.iquest.net> In-Reply-To: <199711180759.XAA20331@super.zippo.com> from Francisco Reyes at "Nov 18, 97 02:59:09 am"
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Francisco Reyes said: > I am going to start working on a program which will be heavy on I/O. > I was wondering what would be a good size to read/write at a time. > > What is the minimun block size FreeBSD allocates? 4K? 8K? Is it HD > dependent? > One more comment, if you are doing sequential I/O, you really don't want to do read/writes less than 4K-8K. You are likely into diminishing returns beyond 8K. -- John dyson@freebsd.org jdyson@nc.com
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