Re: Thanks tor Howord Rogers

From: Howard J. Rogers <howardjr2000_at_yahoo.com.au>
Date: Tue, 18 Feb 2003 05:31:58 +1100
Message-Id: <pan.2003.02.17.18.31.55.613294@yahoo.com.au>

On Mon, 17 Feb 2003 16:14:02 +0100, lopera wrote:

> Hi
> 
> Thanks for the reply
> 
> I understand I can simply ignore the public IPs for the two nodes so 
> both nodes are in a private network (therefore only needs 1 IP each) but 
> I would like to connect to both nodes from a third PC in LAN which wont 
> share the private network in these two nodes

The only distinction that the words 'public' and 'private' implies is that one NIC is *only* for inter-Instance traffic, whilst the other is for the rest of the world to talk to the RAC. As I said, in a production RAC you of course would want to separate the traffic, for performance reasons as much as anything else. BUT YOU DON'T HAVE TO.

The setup wizard itself asks you: do you want to use the public OR private interface for inter-Instance traffic. You can quite happily select 'public' there, and you can proceed. So on a home PC, connected to three other PCs, each with just one NIC, yes, you can build a RAC and then connect to it from the other PCs on the LAN.

> 
> Regarding Oracle software install James mentioned he shared the software 
> between two nodes using NFS, so I guess he installed once only!
> 

You're right, and I'm sorry. I forgot he was using such a technique. But I'd still advise against it (single point of failure etc).

Regards
HJR

> About me saying not reallistic, I didnt mean to not giving credits to 
> James, in fact he did a great job. Sorry about that!
> 
> Cheers
> 
> 
> 
> 
> 
> Howard J. Rogers wrote:

>> On Sun, 16 Feb 2003 20:39:53 +0100, lopera wrote:
>>
>>
>>>Hi Charlie
>>>
>>>Did you have two network cards in your PC/Labtop? It's because according
>>>to note 184821.1 we need 2 IPs, one public and the other for internal
>>>network between two nodes. If that is the case I think we need two NICs
>>>right?
>>
>>
>> Totally incorrect. You would of course have at least two NICs on a
>> production RAC. But it's not a requirement.
>>
>>
>>>Also how did you install the second Linux, as virtual disk from the
>>>first Linux installation or you installed a new fresh Linux from
>>>physical disk?
>>>
>>>I am reading James Morle's paper but it seems like he only had one
>>>Oracle sofwtare installed (unlike a normal RAC installation where both
>>>nodes have Oracle sofwtare).
>>
>>
>> Read again, I think. James' paper uses raw partitions. You can't install
>> Oracle onto raw partitions. Therefore, he had two Oracle installs (one on
>> the genuine PC, and one on the virtual PC). There is no requirement, even
>> with a cluster file system, to have a shared Oracle install, and in fact I
>> find things a great deal more workable, predictable and stable when Oracle
>> *isn't* installed onto the shared device.
>>
>>
>>>Instead he shared them using NFS. Using his
>>>way the installation is not that realistic, RCP is not used to transfer
>>>the software from one node to another, and we dont have to follow any of
>>>the steps in note 184821.1
>>
>>
>> Lord. Who said it was realistic?? James doesn't even make that claim
>> himself. It was a testbed environment in which to test specific things. It
>> means all of us can learn RAC, despite pathetic single PC home setups.
>> Give him some credit!!
>>
>> Regards
>> HJR
>>
>>
Received on Mon Feb 17 2003 - 12:31:58 CST