Contradictory host configuration guidance in docs.

[Ron Wheeler <rw...@artifact-software.com>]

http://docs.cloudstack.apache.org/en/master/concepts.html#what-is-apache-cloudstack
In "About Clusters" it says:
"The hosts in a cluster all have identical hardware, run the same 
hypervisor, are on the same subnet, and access the same shared primary 
storage."

Later in the "About Hosts" it says
"May have different capacities (different CPU speeds, different amounts 
of RAM, etc.), although the hosts within a cluster must all be homogeneous".

The use of "identical" and "homogeneneous" to describe hardware is 
confusing.
IMHO you don't have "identical" hardware if you have different "CPU 
Speeds" and "different amounts of RAM" and different "etc."

What exactly should be said about Cluster hosts? Is it sufficient to 
have the same CPU family?
How far can you stray in the same family?
Can a host with an AMD Opteron 6300 be in the same cluster as one based 
on the AMD Opteron 6200?

Is there any way to clarify these 2 sections on the same page and 
replace "identical" and "homogeneous" with a clearer description of what 
is required.
The cluster comment in the Host section should probably be removed or 
replaced with a reference to About Clusters to avoid having duplicate  
and possibly conflicting information.

Ron


-- 
Ron Wheeler
President
Artifact Software Inc
email: rwheeler@artifact-software.com
skype: ronaldmwheeler
phone: 866-970-2435, ext 102

Re: Contradictory host configuration guidance in docs.

[Rafael Weingärtner <ra...@gmail.com>]

If you are thinking on using Xen, this link might provide you with some
clarification about CPU requirements.
http://support.citrix.com/article/CTX123491?_ga=1.929334.668244781.1422273077

As far as I understand, when creating a cluster you should match CPUs. The
amount of memory in each host does not need to match.

On Mon, Sep 28, 2015 at 6:38 PM, Ron Wheeler <rwheeler@artifact-software.com
> wrote:

>
> http://docs.cloudstack.apache.org/en/master/concepts.html#what-is-apache-cloudstack
> In "About Clusters" it says:
> "The hosts in a cluster all have identical hardware, run the same
> hypervisor, are on the same subnet, and access the same shared primary
> storage."
>
> Later in the "About Hosts" it says
> "May have different capacities (different CPU speeds, different amounts of
> RAM, etc.), although the hosts within a cluster must all be homogeneous".
>
> The use of "identical" and "homogeneneous" to describe hardware is
> confusing.
> IMHO you don't have "identical" hardware if you have different "CPU
> Speeds" and "different amounts of RAM" and different "etc."
>
> What exactly should be said about Cluster hosts? Is it sufficient to have
> the same CPU family?
> How far can you stray in the same family?
> Can a host with an AMD Opteron 6300 be in the same cluster as one based on
> the AMD Opteron 6200?
>
> Is there any way to clarify these 2 sections on the same page and replace
> "identical" and "homogeneous" with a clearer description of what is
> required.
> The cluster comment in the Host section should probably be removed or
> replaced with a reference to About Clusters to avoid having duplicate  and
> possibly conflicting information.
>
> Ron
>
>
> --
> Ron Wheeler
> President
> Artifact Software Inc
> email: rwheeler@artifact-software.com
> skype: ronaldmwheeler
> phone: 866-970-2435, ext 102
>
>


-- 
Rafael Weingärtner