Date: Fri, 17 Sep 1999 09:34:29 -0700 (PDT) From: Julian Elischer <julian@whistle.com> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Dan Nelson <dnelson@emsphone.com>, Brad Knowles <blk@skynet.be>, Thomas Dean <tomdean@ix.netcom.com>, freebsd-current@FreeBSD.ORG Subject: Re: More benchmarking stuff... Message-ID: <Pine.BSF.4.05.9909170933490.13667-100000@home.elischer.org> In-Reply-To: <199909171611.JAA53554@apollo.backplane.com>
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On Fri, 17 Sep 1999, Matthew Dillon wrote: > :> files sitting in unflushed disk caches and you reboot, those files are > :> lost. Softupdated just guarantees that the disk will be in a stable > :> state after a crash, not that all data written before the crash will be > :> available. > :> > : > :Soft updates guarantees that when an fsync() is done, it's on disk... > > Actually.... it doesn't. I wish it did. All softupdates does is > guarentee that the on-disk image is stable, it doesn't guarentee > that the on-disk image has been synchronized to what the program > thinks it has written to the file. According to kirk FSYNC() does the right thing and 'sync()' doesn't. > > -Matt > Matthew Dillon > <dillon@backplane.com> > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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