Re: Oracle 9.2 RAC on Red Hat AS 2.1 setup question

"Howard J. Rogers" wrote:
>
> >If yes, how many NICs are needed in both machines?
>
> You only ever *need* one NIC in each machine, regardless of whether you are
> RAcing on Linux, Windows, or planet Pluto. However, commonsense dictates at
> least two, because you have obviously implemented RAC for the sake of
> redundancy, and having only one is a potential single point of failure.
>
> Typically, one is used to handle 'public' networking messages (ie, client
> connects etc), whilst one is used to handle inter-instance communications
> only.
>
> I've even heard of three being used per box: one for the public traffic, and
> two for the inter-instance stuff (one of these being a redundant failover
> device just in case).

Our usual RAC setup has 6 NICs (well, to be more accurate, 6 physical ports distributed over at least 2 separate NICs - a lot of modern server NICs have multiple ports for this reason): 2 x front end network (regular database traffic), 2 x interconnect, and 2 x back end network (for backups). Always 2x for redudancy sake - as Howard noted there's not much point in going cheap on the NICs if you've spent all the time and effort on RAC.

Regards,
Sean Received on Tue Jan 14 2003 - 20:34:35 CST