Re: RAC Question

Nice name you have there John.

A RAW device is a slice of the disk ( or sometimes a whole disk ). Oracle can use this slice of the disk that "has no file system on it ..." directly ... writing and reading directly without going through the operating system ( and the cache that the os uses ).

Since you avoid the overhead of the os for reads and writes you can get some good performance gains. Oracle buffers the disk data itself in the SGA so you also avoid the "double buffering" ( oracle and the os ) effect.

Someone else incorrectly pointed out dizwell.com as the source of firewire rac articles. Actually you probably want to look at the excellent and in depth articles by Jeffrey Hunter at www.idevelopment.info and/or www.puschitz.com .

Instead of redhat 9.0 you probably want centos 4.2 a free clone of red hat enterprise server. Received on Wed Feb 22 2006 - 08:32:15 CST