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Home > Archive > WebSphere Edge Server > June 2004 > Some samples of goActive and goStandby where a few Clusters are used
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Some samples of goActive and goStandby where a few Clusters are used
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| Manglu 2004-05-19, 7:40 am |
| Hi,
the default sample comes up wiht only one Cluster name
Are there samples with multiple Clusters specified.
Appreciate some assistance.
Thanks.
Manglu
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| Hello,
I didn't reply to your previous post, because I can't give examples due to
an NDA. I must say that I found the samples and the documentation helpfull
(at least one positive point at it).
To keep it simple, I made scripts where I have variables like Cluster1,
Cluster2, etc, Netmask1, Netmask2, etc and make a copy/paste of the
directives to alias/unalias the addresses.
Do you have specific problems or are you "simply" short on ideas on how to
script this in a usefull way (for example, I logged the events in the Event
Viewer or send a mail to the admin) ?
Ben.
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| I'm using Edge (Network Dispatcher) on Win2K.
Now to your questions:
> My only thoughts were to directly add the relevant ifconfig statements
> into my goActive and goStandby scripts instead of using Variables etc.
At first, I made them pretty much hard-coded and would suggest you do the
same, unless you have many clusters to maintain and feel confident in your
ability to script. I then thaught I should refactor my scripts to make then
more generic and centralize all the settings in a single file, but found the
overhead of re-engenering my scripts too much.
What I found pretty much usefull was to log in a file of my own (with echo
statements) when a script is launched, what parameters it received + to
trace every (un)aliasing action with a statement and log the state of the
arp table. This is of unvaluable help when problem arise or when a question
like "when did the take-over take place" come on the table...
> From the HA Status shown above should expect to see a LISTEN on port
> 10100(this is the port that i specified)?
>
> I don;t see any such entry in the netstat and i can't understand why?
In fact, Network Dispatcher has its own TCP/IP stack implementation, aside
the OS. That's why you don't see anything relevant via the netstat
command... In Windows, you'll find ibmnd.sys in <WinNT>\System32\drivers
(IIRC), which is a kernel network driver. I suppose it's pretty much the
same, whatever the platform.
Ben.
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