We can have multiple VMs on a blade, for instance MANY guests on an esxi 
blade, or multiple LPARs on a p-blade. Each of these VMs don't consume a 
lot of CPU/Networking.  

We have tested 100 VMs on a single blade successfully.  Not that they were 
doing a lot, but were available.  Reality is more like 5-20, depending on 
what they are doing.

If I run a yum update all on all of those at the same time, it will 
flatline my blade.

I would take ""only target one of these set of machines at a time" inside 
some sort of micro groups." if that was easy enough to do, but I'd even 
prefer "only target N of these set..." since the blades CAN take more than 
one yum update at a time.  For instance, I have 16 cores on some of my 
blades, so I'd take 8 at a time and see how that goes.

I really thought --randomize-hosts would have been easier.

>>>Ericw



On Monday, October 6, 2014 8:34:29 AM UTC-4, Michael DeHaan wrote:
>
> "Changing the setting to random and the fork value to 40 gives me a 
> reasonable chance that all 40 forks will be more or less equally 
> distributed.  With more than 40 blades, it's a good bet only one fork per 
> blade"
>
> So this seems to imply you have more than one VM running on a given blade 
> (and not that you are talking about a blade chassis).   
>
>

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