Date: Thu, 21 Sep 2000 15:38:36 +0200 (CEST) From: Marius Bendiksen <mbendiks@eunet.no> To: Stephen Byan <Stephen.Byan@quantum.com> Cc: "'Soren Schmidt'" <sos@freebsd.dk>, fs@FreeBSD.ORG, sos@FreeBSD.ORG, freeBSD-scsi@FreeBSD.ORG Subject: RE: disable write caching with softupdates? Message-ID: <Pine.BSF.4.05.10009211537460.38959-100000@login-1.eunet.no> In-Reply-To: <8133266FE373D11190CD00805FA768BF055BD1D3@shrcmsg1.tdh.qntm.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> > OK, I played a bit with that, the only info I can see I get from the > > higher levels is the BIO_ORDERED bit, so I tried to flush the cache > > each time I get one of those, _bad_ idea, 10% performance loss... > That's the price of having a recoverable file system. See Seltzer, Ganger, Not necessarily. > Contrast this 10% performance hit versus what you get when you disable > caching entirely. I think you will see that on some drives, this may have a greater performance impact than not caching at all. Marius To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.05.10009211537460.38959-100000>