Date: Tue, 30 Sep 2003 19:49:33 -0300 (ADT) From: "Marc G. Fournier" <scrappy@hub.org> To: Kevin Oberman <oberman@es.net> Cc: freebsd-current@freebsd.org Subject: Re: Improvements to fsck performance in -current ...? Message-ID: <20030930194544.H94686@ganymede.hub.org> In-Reply-To: <20030930221148.54E7E5D07@ptavv.es.net> References: <20030930221148.54E7E5D07@ptavv.es.net>
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On Tue, 30 Sep 2003, Kevin Oberman wrote: > Current has two major changes re speeding up fsck. > > The most significant is the background operation of fsck on file system > with soft updates enabled. Because of the way softupdates works, you are > assured of metadata consistency on reboot, so the file systems can be > mounted and used immediately with fsck started up in the background > about a minute after the system comes up. Actually, I had this blow up on my -CURRENT desktop once ... didn't have a clue on how to debug it, so I switched from fsck -p to fsck -y to prevent it from happening again :( Now,I don't/wouldn't have softupdates enabled on / .. does the 'background fsck' know to not background if softupdates are not enabled? I'm going to switch back to -p and look a bit closer the next time it happens (if it happens) to see if it is/was a softupdate file system that failed, now that I have a better idea of what I'm looking for ... > I suspect that these enhancements may both require that soft updates be > enabled for the file systems. are either of these enhancements back-patchable to the 4.x fsck, or do they require some non-4.x compatible changes to work? ... I'm at 3.5hrs and counting right now ... any speedup would be great ...
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