RE: Is RAC DOA?

  • From: "MacGregor, Ian A." <ian@xxxxxxxxxxxxxxxxx>
  • To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
  • Date: Mon, 16 Aug 2004 12:19:34 -0700

I'm a bit confused here.  Hereogeneous means of different origin.  I thought 
inside a cluster things had to be the same.  They had to be homogeneous; i.e., 
of the same origin.  I also thought the problem with Oracle is that you need  
to create a single large cluster instead of allowing you to have multiple 
clusters which can communicate with each other.  So with the Orcle grid 
software, when you learn of hardware vendor going out of the machine business, 
and you can buy scores or hundreds of machines on the cheap.  You have to pass.


Ian MacGregor
Stanford Linear Accelerator Center
ian@xxxxxxxxxxxxxxxxx

-----Original Message-----
From: Daniel Fink [mailto:Daniel.Fink@xxxxxxx] 
Sent: Monday, August 16, 2004 11:46 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: Is RAC DOA?

Extend that question into the realm of 'grid' computing. RAC requires a 
heterogeneous environment within the cluster. This means that a RAC cluster is 
not really grid friendly. It is only able to 'shift' processing requirements 
within itself and cannot take advantage of that underutilized server sitting 
next to it in the data center. I asked this question of an Oracle employee 
recently and the response was that RAC does indeed fit into Oracle's grid 
strategy, but there are not any plans to enable a homogenous RAC system. Am I 
missing something?

Daniel



Jesse, Rich wrote:
> I'll add that until <buzzword>hetergeneous clusters</buzzword> are supported, 
> your availability is only good until your next patch (Oracle, OS, or 3rd 
> party).  When you patch one, you most likely need to patch all at the same 
> time.  In the case of Oracle patches, it's mandatory at least thru 9.2.
> Rich
> 
> -----Original Message-----
> Sent: Monday, August 16, 2004 10:48 AM
> Subject: RE: Is RAC DOA?
> 
> 
> One slight quibble, regarding increased availability.
> 
> [snip]
> 
> mwf

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