[occi-wg] Horizontal & vertical scalability in the cloud

Randy Bias randyb at cloudscaling.com
Sun Oct 25 20:26:19 CDT 2009

On Oct 25, 2009, at 5:38 PM, Sam Johnston wrote:
> A better approach to scalability is to have a single object which  
> you can both adjust the resources of (vertical scalability) and  
> adjust the number of instances of (horizontal scalability). That is,  
> you start a single instance with 1 core and 1Gb, then while it's  
> running you crank it up to 2 cores and 2Gb. Eventually you max out  
> at say 8 cores and 16Gb so you need to go horizontal at some point.  
> Rather than create new unlinked instances the idea is that you would  
> simply adjust the

I agree.  This is the future.  Dials for 'horizontal' and for  
'vertical', probably attached to a given tier of an application.

Just as an FYI, I think 'scale-up' VMs are going to be more and more  
common.  We'll see VMs with a *lot* more RAM and cores very soon now.   
Most of the modern OSes handle hotplug of CPU/RAM pretty well.



Randy Bias, Founder & Cloud Strategist, Cloudscaling
+1 (415) 939-8507 [m], randyb at cloudscaling.com
BLOG: http://cloudscaling.com/blog

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