Re: RAC and scalability

On Apr 7, 6:52 am, Andrea <netsecur..._at_tiscali.it> wrote:
> Hi all,
> i've need some advise for resolve my doubt on RAC, because i have to
> sizing RAC environment in my business.
> Have been shows me two different solutions of RAC:
>
> 1)  One node of Bl680c (until 4 CPU quad Core)
>
> 2)  Two node of Bl480c (only 2 CPU quad Core)
>
> The type of choice is a valuate for future scalability, first solution
> support vertical scalability (2 to 4 CPU) instead of second solution
> where scalability is only for horizontal (add a nodes).
> First solution is correct sure but is more expensive and i would like
> to know if his cost is justifiable, more cpu are effective benefit?
>
> thanks for your info
>
> bye
> Andrew

Andrew, I know nothing about the hardware you listed but if you want useful responses you need to identify the type of application that you will be running: OLTP, DSS, OLAP, etc ... and identify the current user load. The Oracle version you will be using is also important.

For the solution to be RAC it must involve at least two nodes.

Also depending on the application design some applications just do not scale well with RAC. To really run well under RAC the application should have been designed with RAC in mind.

If two 2-cpu machines with 2G of memory will run the application reasonably well a single 4-cpu machine with 4G would likely like run it better.

HTH -- Mark D Powell -- Received on Mon Apr 07 2008 - 08:53:17 CDT