Re: Active/Passive to Active/Active

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your disks should be like the quorum, visible/accessible from both nodes
setup your D:\ and E:\ same way you setup your Quorum

"Srinivasm" <Srinivasm@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:DBD6F50B-F947-4A9B-9C8A-766FFE08303C@xxxxxxxxxxxxxxxx
Hi Edwin,

Thanks again for your informative reply....

Actually I am trying this A/A setup on MS Virutal Server 2005, because we
don't want to disturb our A/P setup which is on real/raw machines.

Successfully setup a A/A in Virutal server.. but only issue I am comming
across is, when ever there is a fail in setup, the group on failed machine
is
sucessfully switching to the only active machine, but the disk in group
shows
failed... What could be the problem?

Here are the disks I used in the setup:

Node1
C:\ --- Operating System -- IDE
D:\ --- Shared ---- SCSI 1 ID 0

SCSI Drives: SCSI Adapter ID 6 and SCSI Adapater ID 7 (both are checked
for
clustering)

Node2
C:\ --- Operating System -- IDE
E:\ --- Shared ---- SCSI 1 ID 0

SCSI Drives: SCSI Adapter ID 7 and SCSI Adapater ID 6 (both are checked
for
clustering)

Quorum Disk: SCSI 0 ID 0 on Node 1
SCSI 0 ID 0 on Node 2

Did I do something wrong in above setup?

--
Thanks,
Srinivas


"Edwin vMierlo [MVP]" wrote:


I did go through few docs in ms site and other forums, but got into
confusion when people say A/A is not recomended and most of them speak
only
abt SQL server which can run in multiple instances. Ours is an
application
which can't run in multiple instances on same machine, So I was asking
you
for every detail involved with A/A. Now I got into a conclusion that
our
application may not work in A/A, hope I am correct?


If your application cannot run in multiple instances then you are
limited to
"A/P" in a two node setup.
You can off-course do a 3 node "A/A/P" or "N+1" setup, and set the
"affinity". Setting the AntiAffinityClassNames ensures that no two the
same
applications are running on the same node. See more about this here :
http://support.microsoft.com/kb/296799

For instance, Exchange is using this to ensure that no two Exchange
virtual
servers are running on the same node:
http://technet.microsoft.com/en-us/library/bb124140.aspx

So, a 3 node "N+1" configuration or a more-node "N+1" or "N+2" might
work
for your application.
(e.g the following could work A/A/A/P, A/A/A/A/P/P)

I realize that these are more advanced configurations, so get practice
and
experience first.

Also, I find it always useful to have a "practice-cluster" in a Virtual
Machine, so build yourself a cluster using Microsoft Virtual Server or
VMWare Server, and you can practice away without doing "harm" to your
official production/test equipment/setup.

Good Luck with Clustering, and if you have a problem, post it here and
we
will try to help you out.

Rgds,
Edwin.






.

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