Re: asm vs raw - the smackdown
- From: Greg Rahn <greg@xxxxxxxxxxxxxxxxxx>
- To: jifjif@xxxxxxxxx
- Date: Wed, 27 May 2009 11:16:38 -0700
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
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