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Tell them with OPS they will need to redesign their applications or they risk VERY poor performance. With OPS your app needs to be partitioned so that there is little or no pinging (requests for the same blocks on more than one node). This is because blocks are passed between nodes via physical disk i/o. Each time one node requests a block that is already in another nodes cache, there are at least two physical I/Oss needed to get it there. RAC however pings blocks over the high speed interconnect virtually eliminating any performance bottleneck.
Unless your application can be partitioned, scalability is nill with OPS. With RAC scalability is close to linear and existing applications port well just as they are.
"VijayanK" <vijayank_at_aol.com> wrote in message
news:20020426080904.12052.00004380_at_mb-ck.aol.com...
> I don't know if this has been answered before. How easy or
> difficult it is to install/configure/maintain RAC compared to OPS ?
> My management wants to stick with 8i and install OPS instead of
> upgrading to 9i and install RACs. I have heard it is much easier to
> administer RACs, but I don't have any specific information. Any
> information will be greatly appreciated.
>
> TIA
Vijay
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Received on Fri Apr 26 2002 - 07:42:09 CDT