openstack team mailing list archive

[Sean Bigdatafun <sean.bigdatafun@xxxxxxxxx>]

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.mahroua@xxxxxxxxx
> 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*
> razique.mahroua@xxxxxxxxx
> Tel : +33 9 72 37 94 15
>
>
> Le 11 janv. 2013 à 08:36, Sean Bigdatafun <sean.bigdatafun@xxxxxxxxx> a
> écrit :
>
> When I have a set of rack servers that is 1TB * 4 disks in each of it as
> Nova Compute Node, what is the best RAID (or JBOD) strategy OpenStack
> community recommend?
>
> Basically I'd like to know what a normal disk setup a compute node should
> be using.
>
> Thanks,
> Sean
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-- 
--Sean