Date: Fri, 14 Jun 1996 14:20:35 -0600 From: Nate Williams <nate@sri.MT.net> To: Joe McGuckin <joe@ns.via.net> Cc: nate@sri.MT.net, freebsd-fs@FreeBSD.ORG Subject: Re: Extent like FFS Message-ID: <199606142020.OAA22670@rocky.sri.MT.net> In-Reply-To: <199606142016.NAA20592@ns.via.net> References: <199606142016.NAA20592@ns.via.net>
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> Why not incorporate some ideas from Sprite? One feature that seemed to > speed things up in general was the fact that no metadata gets written out > for a newly created file until it has aged 30 seconds. I think this is a lose as far as POSIX goes, but the FS gurus can thrash this out. > It seems to me this could be a win in a couple of ways: > > - Small, tmp files exist only in the buffer cache & never get > written to disk if they don't live more that 30 seconds. If you are worried about files in /tmp, use MFS. :) > - There out to be a way to queue all the newly created files together > then write them out together at once after they've lived 'X' amount > of time. And when your system power goes away in the middle of writing out these files and they happen to be pretty important what happens? > Where can I find an indepth explanation of how the FFS file system code works? There are papers in the system, plus the 4.4BSD book apparently goes into detail on it. Nate
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