Date: Mon, 7 Feb 2000 18:32:37 +1100 From: Jonathan Michaels <jon@welearn.com.au> To: Greg Lehey <grog@lemis.com> Cc: Rowan Crowe <rowan@sensation.net.au>, freebsd-isp@FreeBSD.ORG Subject: Re: Performance of FreeBSD and MS Windows. What about select() and memory management etc ? Message-ID: <20000207183235.A6558@phoenix.welearn.com.au> In-Reply-To: <20000207120802.K22697@freebie.lemis.com>; from Greg Lehey on Mon, Feb 07, 2000 at 12:08:02PM %2B1030 References: <20000207114238.G22697@freebie.lemis.com> <Pine.BSF.4.01.10002071224470.23293-100000@velvet.sensation.net.au> <20000207120802.K22697@freebie.lemis.com>
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On Mon, Feb 07, 2000 at 12:08:02PM +1030, Greg Lehey wrote: > On Monday, 7 February 2000 at 12:29:54 +1100, Rowan Crowe wrote: > > On Mon, 7 Feb 2000, Greg Lehey wrote: > > > >> On Monday, 7 February 2000 at 11:40:43 +1100, Stanley Hopcroft wrote: > > > > [...] > > > >> Getting back to your own experience: by default, FreeBSD doesn't do > >> DMA on IDE drives. It's possible that the perceived performance would > >> be much better with DMA. In addition, kde is a known memory hog. > > > > Do you know of any pointers to increasing the performance (in general) of > > FreeBSD's IDE drivers by tweaking the kernel settings? > > There's not too much else you can do, apart from setting DMA and > maximum transfer length. Note that the current driver is going away. > Even the upcoming 4.0 release will have the new driver, at, which > should be a lot better. In particular, there's a known problem with > the wd (old) driver with partitions over 27 GB in size. These *must* > be run in LBA mode. See wd(4) for more details. by way of similar path .. would it be possible to marry acouple of ide (9 Gb) drives into a vinum styled single "drive", and then to integrate the following logical array ? would it be possible to make up a big drive array from a couple of 2 Gb ide drives and a couple of 1 Gb scsi2 drives. what sort of perforrmance issues. compatability issues would i have to look at. your thoughts would be appreciated. i'm aggregating old computers and sloughing the junk. warm regards jonathan -- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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