This all depends on the applications and other things you are running.
Look at hardware raid if possible therefore the card will do the processing
not the processor.
If you are using lots of swap space, PUT MORE MEMORY IN, that will speed it up
the most.
Databases are better on their own drive array if you can because then they are
not competing with the other operations on the system.
The Hard Disk is slowest when it has to move the Armature across the disk if
it is reading directly inline or writing then it is the fastest.
It also depends on the actual software raid you are using and the actual
application not just a DB but MYSQL vs Oracle...
On Monday 14 April 2008 4:40:46 pm Federico Sevilla III wrote:
> On Mon, 2008-04-14 at 00:48 -0700, Michael Tinsay wrote:
> > Since you have 3 disks, why not go for RAID 5 to get striping accross
> > the three disks?
>
> This is something I've been hoping to discuss with the other members of
> this list. Assuming:
>
> 1. We'll be using Linux software RAID (md).
>
> 2. Everything else hardware including the hard drives are identical.
>
> Which will be faster?
>
> 1. RAID 1 with two drives
>
> 2. RAID 5 with three drives
>
> I'm noticing significant CPU time in IOWait and have a two-drive RAID 1
> setup, and am hoping to beef up the I/O subsystem with the only
> realistic option being to add another drive and go into software RAID 5.
> I don't know if this will make sense or not, though.
>
> Comments? Thank you very much.
>
> Cheers!
--
Regards,
Michael Cole
LPIC-1
"The man who does not read good books has no advantage over the man who can't
read them. "
- Mark Twain
"It is our choices, Harry, that show what we truly are, far more than our
abilities."
— J. K. Rowling
"Wear the old coat and buy the new book."
— Austin Phelps
"I'm not a teacher: only a fellow traveler of whom you asked the way. I
pointed ahead – ahead of myself as well as you."
— George Bernard Shaw
_________________________________________________
Philippine Linux Users' Group (PLUG) Mailing List
http://lists.linux.org.ph/mailman/listinfo/plug
Searchable Archives: http://archives.free.net.ph
