Razique,
Let's think of the following scenario, we use Nova to build an EC2-kind of compute cluster. For EC2, they offer
M1.Small = 1 vCPU + 1.7GB Mem + 160GB Disk
M1.Medium = 2vCPU + 3.75GB Mem + 410GB Disk
M1.Large = 4vCPU + 7.5GB Mem + 850GB Disk
M1.ExtraLarge = 8.vCPU + 15GB Mem + 1.7TB Dsik
...
This means that they at least have 1.7TB disk space on a physical server (presumably 2 x 1TB disk).
What RAID option would we use in designing our cluster? For our Nova compute nodes,
-- Do we have a JBOD configuration of 2 disks?
-- do we have a RAID 0 of 2 disks?
-- or do we use more enterprise like RAID 5?
Thanks and hopefully this starts some discussion in this direction.
Thanks,
Sean
On Fri, Jan 11, 2013 at 12:46 AM, Razique Mahroua
<razique.mahr...@gmail.com> wrote:
Hi Sean,
I may be wrong, but I think there is not any "best" RAID strategy when it comes to the disk for the nodes or a "normal" one. All RAID type have their pros and cons.
It'a all about security over performance against total space that would end up usable. What RAID controller is that?
Regards,
Razique Mahroua - Nuage & Co
<NUAGECO-LOGO-Fblan_petit.jpg>
--
--Sean