Re: Clustering and browsing

[Eric J Waters <ewaters2@xxxxxxx>]

No, an IP sprayer is not round robin DNS.  We could not use round robin in
our network.  It is a switch type of device and you would have an IP
associated with it.  You would then assign your web sight to that IP
address.  The switch would be configured to balance/fail over to defined
IPs behind it which will be your web servers.  You can even build
redundancy with multiple sprayers.  I believe we did use a CISCO product
and will pass the info when I talk to the networking folks.

You will have to tweak the settings it to your environment and application.
We had an issue where it would failover or balance between pages of an app
and ask the user to reauthenicate.  We fixed it by setting a "sticky"
parameter.  It would take a response timeout from the original connection
before it would fail over to a second server.

I was a solid solution in which the client was extremely happy.  It was
only dismantled because they decided they no longer needed the redundancy
for said application.

The best part of this solution, you had no clue which server you were
connect to in the cluster.  The sprayer kept the integrity of the URL.

Eric


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