Date: Sun, 14 Apr 2002 12:45:07 -0300 (ART) From: Fernando Gleiser <fgleiser@cactus.fi.uba.ar> To: Gregory Keefe <keefeg@keefeg.com> Cc: <freebsd-questions@FreeBSD.ORG> Subject: Re: Softupdates Message-ID: <20020414122514.E5464-100000@cactus.fi.uba.ar> In-Reply-To: <002301c1e31e$1dbe2850$9865fea9@GPC>
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On Sat, 13 Apr 2002, Gregory Keefe wrote: > FreeBSD Claim: > http://www.freebsd.org/features.html > Soft Updates allows improved file system performance without sacrificing > safety and reliability > > A Unix Expert's Claim: > http://cr.yp.to/qmail/faq/reliability.html > ``Do not use async or softupdates filesystems. If you do, and if your system > crashes at the wrong moment, you will lose [data].'' > > http://cr.yp.to/daemontools/multilog.html > ``Beware that NFS, async filesystems, and softupdates filesystems may > discard files that were not safely written to disk before an outage.'' > > Which should I believe? > > Sofupdates ensure that the *filesystem* is not corrupt after a crash. They don't say anything about *data*. You may lose data after a crash. If you are worried about losing data, you can mount the filesystems sync, but I don't think you'll like the performance. =0) IMHO, filesystem corruption is far worse than data loss of the last writes before the crash. Use softupdates on your filesystems and use a good UPS and hardware to minimize the risk of a crash. You have a good UPS on your production systems, dont you =0) Fer To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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