Cluster Server

Posted on 2006-05-23
Last Modified: 2013-12-18
Dear Experts,
Another question.

OS; Windows2000
Domino Server: 6.5

Main aim for Cluster:
When ServerA is down, users should be able to access ServerA cluster. And also , we need to do Load balancing.

Appreciate if anyone gives me step by step procedure...

Thank you,
with rgds,
Question by:madheeswar
    LVL 63

    Expert Comment

    Is this just for Web based applications or also for mail ?

    Please provide a little more info .

    LVL 15

    Accepted Solution

    Settting up a Domino cluster is very easy (that works for Notes clients)
    It gets a bit more difficult to cluster you webapplications (and maybe your mail)

    To set up the Domino cluster, you need 2 installed and configured Domino servers on 2 separate machines (physical or virtual).
    They need to be able to communicate over the network, a 100 Mbit connection is enough generally.
    Select the 2 servers in the Addressbook / Servers view and select the "Add to cluster" action.  Give the cluster a good name - and you're done.

    To effectively use the cluster, you need databases that have replica's on both servers ....

    The web/mail clustering is something else - if you need to do that, let us know.


    LVL 18

    Expert Comment

    Hey, tom.. related question... would you use WAN clustering as a type of disaster recovery on mail servers?  (and if I need to post a separate question, let me know, I will).  Is possible?
    LVL 19

    Author Comment

    Lets discuss it here. We can have a central repository thread on Clustering.

    Tom and Sysexpert,

    This should be for Notes aswell as Web. Appreciate if you can provide Step by Step procedure as I don't have any idea on this.

    Thank you.

    With rgds,
    LVL 15

    Expert Comment

    The http clustering is not very strong in Domino, since it only does redirection from 1 dns address to another.  It doesn't do automatic failover , so users wil lhave to reconnect to the 'master' address first, and it doesn't keep the sessions.
    That said, it does work good because it will do load balancing and is intelligent enough to redirect users only to servers where the database they want to access is actually present (not very important if you replicate all your databases between 2 cluster members, but very interesting if you have a cluster with , say, 3 members and you distribute the databases) but best of all, it's free with domino.  Although it's far from perfect, I do use it extensively.  If you need real load balancing, you'll need a more sophisticated 'load balancer' in front of your domino servers, like WebSphere Edge or a network appliance from eg. Cisco (this tends to cost a lot !!!)

     To do http clustering, you need to do some system administration first :  I generally use simple DNS round robin, to distribute the load to the ICM (Internet Cluster Manager), the service that will actually distribute load between your servers.  I run this ICM on all my servers, with dns round robin... So  :
    - make sure you have (at least) 2 network cards in every system, or 2 IP addresses (on 1 card)
    - create some dns entries in your dns server :
    eg. with 2 ip addresses , for your 2 servers
    - create dns entries for the 'real' http servers :
    eg. and

    Now in Domino, create some extra ports : you need a separate port for your icm on every server.
    Then bind the http task to a dns address (intranet01 and intranet02), and bind the icm task (also on the server document) to the address.
    To start icm on the servers, create a program document or add it to the notes.ini (servertasks=...,http, icm)
    That should be it, and in the Administration help, you'll find a detailed step-by-step guide


    LVL 19

    Author Comment

    Thanks Tom.
    I will go through it and test. Will let you know how it went.

    LVL 19

    Author Comment

    I will be closing this question soon.

    Give me one more week. My test will be finished. Once I close this thread, I may not continue posting response and getting suggestions from Experts.

    Hope you have understood.


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