Re: SUN Concatenated file system as storage?

What is the difference between cooked devices and filesystem files? I've assumed that these were the same thing. We use raw space on all of our Informix IDS instances. We are just about to switch over from SUN disks to EMC. My unix admins are questioning the speed differences between raw and cooked on EMC with all of its cache etc. Is the difference as significant in the case of EMC? Dick Brieck "Art S. Kagel" <kagel@bloomberg.net> on 12/13/99 03:46:59 PM Please respond to kagel@bloomberg.net To: informix-list@iiug.org cc: (bcc: Dick Brieck/CHASE) Subject: Re: SUN Concatenated file system as storage? Lucent wrote: > > Currently the system we use has a concatenated file system that stores all > the data for the database. Thus my belif is this is very bad. I was hoping > to find what everyone elses option of this is. Does anyone else use a > concatenated file system? and have you changed to raw disc? what are your > feeling about this? RAW disk devices tend to be from 15% to 35% faster than COOKED devices and from 25% to 50% faster than filesystem files. Art S. Kagel