[Users] so, what do you want next in oVirt?

[NOC]

On 09/06/2013 08:11 AM, Karli Sjöberg wrote:
> What about swap? Don´t they have any swap file, or partition at all? 
> Swap-file over NFS must suck quite badly, no? We have bought 
> semi-cheap SSD's for our Hosts to use as swap to get more out of them 
> from memory overprovisioning.

I don't quite see the point, unless you have mirrored ssd's. Data 
corruption on ssd's is more frequent than on spinning disks and 
disastrous when it happens in a swapped out page... (And why not add 
more RAM?)

But why use swap at all? I'm assuming you dimension a node to its 
intended use, so I guess lots of memory and CPU cores (in our case 
anyway) and you can allocate the available memory to the VMs until it's 
finished. I don't see much need for swap there.

Perhaps my view is different than usual, I see swap as the gravelly 
escape roads on steep hills for trucks/cars who have failing breaks. It 
just reduces the damage in case of unexpected failures. Swap isn't 
something to use on a regular basis as cheep memory, as RAM is not that 
expensive anymore and magnitudes faster.

/Simon