On 07/26/2006 12:13:42 PM, Kevin Closson wrote: > Be aware that "Intel I 686 **boxes**" (plural) have more I/O bandwidth > than the filer. Crack open the filer and you'll see a little > intel box (depending on model). So all I/O requests have to go > over an northbridge chipset and out over PCI ethernet. A two node RAC > cluster will always be able to swamp a single-headed filer. Single > headed NAS > (filers) are a bottleneck. Measure sequential writes some time and > you'll > see what I mean. I distinctly remember reading your excellent paper from RMOUG about single-heade filers versus multi-headed filers. I can only wholeheartedly recommend it to anybody who wants to learn a thing or two about NAS and RAC. -- Mladen Gogala http://www.mgogala.com -- //www.freelists.org/webpage/oracle-l