Date: Sat, 13 Apr 2002 15:52:49 -0400 (EDT) From: Zhihui Zhang <zzhang@cs.binghamton.edu> To: Gregory Keefe <keefeg@keefeg.com> Cc: freebsd-questions@freebsd.org Subject: Re: Softupdates Message-ID: <Pine.SOL.4.21.0204131549370.2370-100000@onyx> In-Reply-To: <002301c1e31e$1dbe2850$9865fea9@GPC>
next in thread | previous in thread | raw e-mail | index | archive | help
IMHO, all file systems lie. When you write a piece of data to it, it holds it without committing to disk immediately. The purpose is to improve performance. You can always request synchronous I/O, but that will be a nightmare for performance. Anyway, how often does we have a power failure? -Zhihui 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? > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.SOL.4.21.0204131549370.2370-100000>