Date: Wed, 19 Dec 2001 14:06:49 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Roy Sigurd Karlsbakk <roy@karlsbakk.net> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: increasing readahead? Message-ID: <20011219200649.GA30574@dan.emsphone.com> In-Reply-To: <Pine.LNX.4.30.0112191821210.17775-100000@mustard.heime.net> References: <Pine.LNX.4.30.0112191821210.17775-100000@mustard.heime.net>
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In the last episode (Dec 19), Roy Sigurd Karlsbakk said: > I really need a LARGE readahead for my application. Does anyone know > how I can increase the current one? man setvbuf > I also need a way to pre-allocate chunks of 4 megs when I'm writing > to a file, to make the actual fragments large enough to eliminate a > large part of the actual overhead of seeking Are you sure this is your problem? FreeBSD does write clustering and allocates disk space to avoid fragmentation. -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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