Date: Tue, 18 Sep 2001 00:38:59 -0500 From: Mike Meyer <mwm@mired.org> To: Brian T.Schellenberger <bts@babbleon.org> Cc: questions@freebsd.org Subject: Re: soft updates Message-ID: <15270.56819.636304.261065@guru.mired.org> In-Reply-To: <89370727@toto.iv>
next in thread | previous in thread | raw e-mail | index | archive | help
Brian T.Schellenberger <bts@babbleon.org> types: > On Sunday 16 September 2001 20:53, Nathan Mace wrote: > > basically what i'm asking is is it stable? and how much of a performance > > gain am i gonna see? thanks > > "Yes," and "a lot", respectively, but you *must* turn off write-cache on your > disk if you are going to use soft updates. Only for IDE drives. SCSI provides features that let you use write-cache safely - if the driver you are using supports the feature. Check the driver manual page for "tagged queuing". If the driver supports that, you can turn write caching on for the SCSI drives attached to it. IDE disks that support tagged queuing are coming and the ATA driver supports them, but the most recent report I have says they aren't very reliable. <mike -- Mike Meyer <mwm@mired.org> http://www.mired.org/home/mwm/ Q: How do you make the gods laugh? A: Tell them your plans. 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?15270.56819.636304.261065>