Date: Tue, 02 May 2000 09:51:34 -0700 From: Mike Smith <msmith@freebsd.org> To: Brad Knowles <blk@skynet.be> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: How good is AMI MegaRAID support? Message-ID: <200005021651.JAA24520@mass.cdrom.com> In-Reply-To: Your message of "Tue, 02 May 2000 11:28:38 %2B0200." <v04220803b5344e4de122@[195.238.24.94]>
next in thread | previous in thread | raw e-mail | index | archive | help
> At 5:20 PM -0700 2000/5/1, Mike Smith wrote: > > > FWIW, most of the low-end PCI:SCSI RAID controllers claim throughput in > > the 3-5k IOPs, and 20k is not an uncommon claim for mid-high end > > controllers. Simon Shapiro was pushing over 20k on the DPT Century > > adapters in "real" applications. I've had a hard time generating more > > than 3k or so out of a FreeBSD box's I/O subsystem - we cluster so > > aggressively that I typically run out of I/O bandwidth before I hit an > > IOP limit. > > I can't speak for the newer controllers, but you guys know where > the pages are that show the results of my previous benchmarks with > the DPT SmartRAID IV. The SmartRAID IV is not the same animal as the Century; the IV is a very old design and should probably be considered in the same vein as the Mylex DAC960PL and the AMI MegaRAID 418. Functional, but not a performance solution. -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200005021651.JAA24520>