Ubuntu's performance : how to speed up ?

[John DeCarlo]

On Thu, 17 Feb 2005 18:40:06 +0100, Vincent Trouilliez
<vincent.trouilliez at modulonet.fr> wrote:
> > And also twice the risk, right? If one of the disks go bad in a RAID-0
> > setup, you lose all the data.
> 
> I did think of this. But to be fair, I would think it's safer ! You have
> two drives to hold your data, so if one fails, you lose only half of the
> data

Yes, you only lose half your data, but RAID-0 uses striping.  This
means that for every X bytes you store on the virtual drive, half the
bytes are on one disk and half on the other.  It means when you go to
load a file or a database record, it reads from both drives
simultaneously - good for performance.  But if you lose one drive, you
have lost half of every file (except maybe very small files).  Not
usually all that useful.

To quote searchstorage.com:

"RAID-0. This technique has striping but no redundancy of data. It
offers the best performance but no fault-tolerance."

-- 
John DeCarlo, My Views Are My Own