Re: [Xen-users] SW RAID powered Xen node - knowledgeable feedback much needed

[Bart Coninckx <bart.coninckx@xxxxxxxxxx>]

On Tuesday 26 October 2010 23:06:20 Jonathan Tripathy wrote:
> On 26/10/10 20:25, office@xxxxxxxxxxx wrote:
> > I would like to know your opinion on the viability of a SW RAID 1 powered
> > Xen node. The CPU is a i7-920 Quad core, 2.66Ghz, 8MB cache and 8GB of
> > RAM. The 2 HDDs are absolutely normal (no raptor, 10k-15k etc - just
> > normal SATA) and there's no HW RAID. I was thinking to allocate some 70%
> > of the resources to VEs and the rest to the node itself.
> > 
> > Can this be done reasonably?
> > 
> > Adding HW raid would mean an 60% price increase which would lead to 60%
> > more VEs on the node. Would the 60% increase in VEs count but with HW
> > RAID be preferable over the SW RAID with less VEs?
> > 
> > Thanks a lot in advance for any knowledgeable feedback.
> 
>  From personal experience, I can say that unless you are going to spend
> a lot of money on an expensive RAID controller, just go with software
> RAID. We have servers that use Linux's software RAID (mdadm) and it is
> fantastic!
> 
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You have of course no goodies like battery backed up cache.

B.

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