thanks for all your considered replies. -Jeff Wong 2009/5/28 Greg Rahn <greg@xxxxxxxxxxxxxxxxxx> > Both ASM and raw use the exact same system calls to issue I/O, so > there is no performance difference based on function calls/call stack. > > The ASM advantage is in the automatic striping of data over the LUNs > (ASM disks) - the ASM logical layer. This reduces time to implement a > well performing db layout as well as maintenance (disk additions & > rebalanced) in the future. In other words, it takes much more time > and effort to create a good layout with raw than it does with ASM. > > > On Wed, May 27, 2009 at 1:30 AM, ~Jeff~ <jifjif@xxxxxxxxx> wrote: > > Hi all > > does anyone know of any papers or study comparing ASM vs raw performance? > > We have a vendor deadset on raw, and the DbAs would rather not have to > deal > > with that! > > thanks- > > Jeff Wong > > > > -- > Regards, > Greg Rahn > http://structureddata.org >