Re: 10g RAC design options

Hi Daniel,

all my comments here come from real life experience and not assumptions.

yes, it is true that adding nodes to a RAC cluster is one of the major marketing points and the stupendous ability of RAC to accommodate that. I myself have configured/added more nodes when applications are written well to scale and perform.

Just for the records, we are talking of scalability here and NOT RAC's ability to scale. If an application is crappy, come what may, RAC WILL NOT scale.

i am referring to the fact that adding nodes is not the solution *always*. Many a time, adding resources to your existing node(s) have, has and will solve scalability issues.

What i was refering to is the fact that applications (and servers) DO NOT scale just because you keep adding nodes. 10g RAC can probably take a million node cluster and million Petabyte database but what are going to run on it? Solitaire, Doom or one of the new age violence ridden games?

have you ever tried running a datawarehouse on a 4-node Linux cluster?

if you write your application from scratch on Linux or adopt it for Linux, then you have something to argue about scalability and adding 1024 nodes to an existing cluster.

have you tried a commerical billing, banking or enterprise application(s) on a 4-node Sun/AIX/Tru64/HPUX/Linux cluster and have you actually seen what problems these applications face? i am not even going to talk about 8-node clusters and beyond.

it is acceptable that applications may be badly written and RAC is not blame. Amazon's datawarehouse and web applications are written well and is RAC adopted.

Having a 64-Node RAC cluster with Web servers, Apps Server and concurrent managers on them is NOT a very intelligent thing to do.

If you don't like Sun boxes or if it doesn't work according to your expectations, you are entitled to your opinion. If you think blindly adding nodes is the answer to scalability woes then i think you may have some misunderstanding.

regards
ski Received on Thu Jul 07 2005 - 23:40:13 CDT