Date: Fri, 21 Sep 2007 09:19:19 -0400 From: Gary Palmer <gpalmer@freebsd.org> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-fs@freebsd.org Subject: Re: Writing contigiously to UFS2? Message-ID: <20070921131919.GA46759@in-addr.com> In-Reply-To: <fd0em7$8hn$1@sea.gmane.org> References: <46F3A64C.4090507@fluffles.net> <46F3B4B0.40606@freebsd.org> <fd0em7$8hn$1@sea.gmane.org>
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On Fri, Sep 21, 2007 at 02:50:14PM +0200, Ivan Voras wrote: > Eric Anderson wrote: > > >The largest file size per chunk in a cylinder group is calculated at > >newfs time, which determines also how many cylinder groups there should > >be. I think the largest size I've seen was something in the 460MB-ish > >range, meaning any contiguous write above that would span more than one > >cylinder group. > > Hmm, how did you manage to create a file system with such large cylinder > groups? I've experimented with smallnum-TB file systems and still > couldn't make them larger than around 190 MB (though I wasn't actively > trying, just observed how they turned out). Presumably by using the -c parameter to newfs. The original poster might get some traction out of a combination of -c and -e parameters to newfs, although the fundamental behaviour will remain unchanged.
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