How to install multiple dispatcher

[monica]

Hi Friends,


Please help me on this,
I have installed cognos in a desktop and i want to try installing multiple dispatchers. I am new to installation. How to install multiple dispatcher on a single machine ?

Thanks,
Monica

[MFGF]

Hi Friends,


Please help me on this,
I have installed cognos in a desktop and i want to try installing multiple dispatchers. I am new to installation. How to install multiple dispatcher on a single machine ?

Thanks,
Monica

Do you mean you have installed the Cognos 8 server software onto a desktop machine? Basically, you get one dispatcher per installed instance of Cognos 8. Assuming you installed all components into one instance, they all share the same dispatcher. To get multiple dispatchers, you need to install either onto a second machine, or into a separate instance on the same machine. Be aware that there can only be one active content manager, so if you do a full second install, the content manager for this can be configured as a standby. The application server components will load balance and fail over between themselves automatically. Ideally you will have a single gateway, configured to talk to one of your dispatchers, and with the second as a failover.

Why do you want multiple dispatchers, by the way? Is it just a learning exercise?

MF.


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[Grim]

Re-run the install.
Install to a separate directory (NOT your original Cognos install dir).
When selecting components select the "Application Tier" ONLY.
Finish the install.
Run cognos config and make sure you change all the ports so they do not interfere with the first/original install.

[monica]

.

[monica]

@MFGF Yes i am  working it as an excercise.
Thanks MFGF and  Grim for your reply .


In the same way we can install multiple gateways (web tier components ) on a desktop ?

One question more... How does the first installation come to know that the other dispatcher exists ?

[smiley]

In the same way we can install multiple gateways (web tier components ) on a desktop ?
yes.
One question more... How does the first installation come to know that the other dispatcher exists ?
On startup it registers in the content store, and get's the info on the other dispatchers.

[Marva55]

Re-run the install.
Install to a separate directory (NOT your original Cognos install dir).
When selecting components select the "Application Tier" ONLY.
Finish the install.
Run cognos config and make sure you change all the ports so they do not interfere with the first/original install.

Does Cognos Configuration handle the fact that two Windows services can't have the same name?

Do you manually need to register the Cognos Windows service on the second instance of Cognos?

[MFGF]

Does Cognos Configuration handle the fact that two Windows services can't have the same name?

Yes it does.

Do you manually need to register the Cognos Windows service on the second instance of Cognos?

Nope - it does this for you.

[Marva55]

This was a easy one! ;D

I discovered that the possible issue with duplicate Windows Service names was no issue. The second dispatcher Windows Service name could easily be renamed in Cognos Configuration before booting up the second dispatcher for the first time.