This is exceptionally good from Gaja's doc: "A disk cannot spin faster than its design specification, cannot service data-transfers that exceed its I-O bandwidth and cannot support a zillion concurrent I-O operations. This is true regardless who your storage vendor is."
I think I'll get a few cans of spray and gonna paint it to the local storage vendors' walls after dark. Or at least to few salesguys doors who sincerely tell you that you don't have to worry about IO or file placement *at all* since "we got lot's of cache" and "the storage box sorts everything out on his own". (Hm... btw, should storage arrays be called "he" or "she"? ;) Tanel. ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Friday, August 22, 2003 6:24 PM > To whomever posted the link to Gaja's paper Implementing RAID on Oracle - > thank you. I previously had printed and passed this article on to my system > administrator -- no reaction. But yesterday he was building our new Sun > system with all the latest features, and was so excited about the paper that > he asked for a second copy to share with his junior sys admin. He stopped > building the system to take a day to study Gaja's paper in detail. > Of course, the Sun engineer is saying "our new RAID 5 is just as fast as > RAID 10 because we stripe parity across all disks". > Since this will be an OLTP system, I am planning on an 8K Oracle block > size, unless anyone has better information on how to pick a block size. > Apparently there are a lot of storage system parameters you can optimize, > but they are based on the Oracle block size. > > > > Dennis Williams > DBA, 80%OCP, 100% DBA > Lifetouch, Inc. > [EMAIL PROTECTED] > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: DENNIS WILLIAMS > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Tanel Poder INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
