On Tue, Feb 19, 2002 at 12:12:54PM -0800, Trent Piepho wrote: > > I have no benchmarks for these controllers, but some for 3ware escalade IDE > raid controllers. From my research it seemed these were the best ones to get. > This might give you an idea of what to look for in performance. > > Tyan TigerMP, AMD 760MP chipset, dual athlonXP 1800+ > 3-Ware Escalade 7410, Maxtor D540X 120GB drives (two and four drives) > Kernel 2.4.16, 99GB ext2 filesytem > > -------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 > RAID0 2d 1500 20767 99.0 38409 16.9 17173 9.7 17810 84.5 71408 25.5 327.9 1.9 > RAID0 4d 1500 20863 99.5 75553 34.5 17293 10.2 19161 91.8 102605 39.9 503.8 2.4 > RAID5 4d 1500 5989 28.4 5602 2.2 3883 2.0 11864 56.8 85523 34.2 436.2 1.6 > > > Supermicro 370DE6, ServerWorks HE-sl chipset, dual PIII 1000 > 3-Ware Escalade 7850, Maxtor D540X 120GB drives (four drives) > Kernel 2.2.20, 99GB ext2 filesystem > > -------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 > RAID0 4d 1300 19981 99.6 78259 43.5 25303 33.4 18295 88.9 141316 80.5 787.4 4.5 > RAID5 4d 1300 19892 99.1 26533 12.2 6856 8.8 15146 73.3 92960 49.0 785.9 2.9 > > > Hopefully I will be able to add more drives to the 7850 controller, which can > hold up to 8, and see if that increases RAID5 performance. However, even the > current hardware raid5 is much faster than a Mylex Extremeraid 3000, which is > a much more expensive card (about $1600 vs $650) and uses much much more > expensive SCSI drives ($8.20/GB vs $1.66/GB). I didn't save the E3000 > benchmarks, but it was about 20MB/sec write and 50MB/sec read I think. Wow, those numbers look great! Any idea why the PIII system seems to be a bit faster than the XP system, especially with random seeks? How much memory does each machine have? Do you happen to remember how many random seeks/s the SCSI system was able to sustain? I'm forwarding these numbers to my sysadmin in order to convince him to pick up some of these cards to play with. ;-) -Dave - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
