Got an URL for Bonnie? I'll check it out on my setup. Will ----- Original Message ----- From: John Grant <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, April 28, 1999 8:43 AM Subject: Still miserable performance with AMI Megaraid ? > Following the recent discussion about AMI`s rather dreadful > SMP performance I made the upgrade > from the 0.96 driver (included in 2.2.6) to 1.0. > > This system has 6 * 9GB Atlas II drives, three per channel, setup as > write-back, 64K stripe > size, RAID 5: > > Driver 0.96 > > -------Sequential Output-------- ---Sequential Input-- > --Random-- > -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- > --Seeks--- > Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU > /sec %CPU > 1000 2915 80.0 8030 23.9 4148 22.7 3467 88.3 9856 23.6 > 93.1 4.7 > > Driver 1.0 > > -------Sequential Output-------- ---Sequential Input-- > --Random-- > -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- > --Seeks--- > Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU > /sec %CPU > 1000 2792 70.3 9118 27.1 4836 26.1 3490 84.6 11499 27.3 > 244.0 12.5 > > > Using the same drives in RAID 0 + 1 format (with 8K strip) yields > slightly worse > performance all round. Now, given that I want RAID for reliability, I > have no complaints > about the AMI card (no data lost so far), I bought AMI cards for the > price (so I`m still > happy on that count), but the performance is, umm, lame. > > If you don't recognise the above benchmark layout, the program is > Bonnie. Using a > large Sun and software striping with dismal little 4GB drives, has > yielded bonnie values > several times the above - so I'm not too happy with this performance. > > Anybody doing any better ? > > - > Linux SMP list: FIRST see FAQ at http://www.irisa.fr/prive/mentre/smp-faq/ > To Unsubscribe: send "unsubscribe linux-smp" to [EMAIL PROTECTED] > - Linux SMP list: FIRST see FAQ at http://www.irisa.fr/prive/mentre/smp-faq/ To Unsubscribe: send "unsubscribe linux-smp" to [EMAIL PROTECTED]
