Date: Mon, 23 Apr 2001 12:09:26 -0500 (CDT) From: Mike Silbersack <silby@silby.com> To: <niek@bergboer.net> Cc: Alfred Perlstein <bright@wintelcom.net>, <freebsd-hackers@freebsd.org> Subject: Re: UFS block size vs. write speed Message-ID: <Pine.BSF.4.31.0104231207360.1931-100000@achilles.silby.com> In-Reply-To: <20010423134554.A57241@wit379119.student.utwente.nl>
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On Mon, 23 Apr 2001, Niek Bergboer wrote: > I've implemented a quick hack on the BSD ftp-client: in the original > recv-file function data is read from a socket into a buffer, which is > then written to a file. I've mmap-ed the file, and rather than reading > from the socket into the buffer, I read directly from the socket into > the mmaped region. I use the MAP_SHARED and MAP_NOSYNC flags, and > especially the latter makes a huge difference. I seem to remember Matt Dillon saying that if you extend a file through mmap'd writes, it will become very fragmented. Check the archives for this mailing list during decemeber or so, I believe the thread had something to so with usenet servers. Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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