Re: Oracle RAC - Design

It is supported, so you can do hardware upgrades by adding new nodes to your cluster, then deleting the old ones.

However, it is not recommended for sustained durations. The huge imbalance in CPU cores and memory may cause odd, asymmetrical loads on the interconnect and result in strange gc waits. Oh course, the risk would likely be mitigated if the load wasn't very heavy, but with nodes as large as you specified, I suspect you're expecting substantial workloads.

I would recommend running on identical hardware, and balancing your workload so as to minimize interconnect traffic.

Hope that helps,

-Mark

On Fri, Jan 29, 2016, 04:55 AMIT VERMA <verma.labs_at_gmail.com> wrote:

> Hello Everyone,
>
> I was going through some design documents, there is case where two servers
> has different hardware configuration mainly - CPU Cores & Physical RAM.
> Below are the same for your reference.
>
> Now, the requirement to setup RAC using both servers but I might think
> there would be adverse effect of hardware in-compatible. Request you to
> please share your thought on the same.
>
> Server 1
> ------------
> 1. CPU Cores 1157
> 2. RAM is 64 GB
>
> Server 2
> -------------
> 1. CPU Cores 400
> 3. RAM is 256 GB
>
> Thanks for your time.
>
> Cheers,
> Amit Verma
> v.amit84_at_skype.com
>
>
> "Winning takes talent but it takes character to keep winning"
>

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