Author Topic: Looking for persistence advice  (Read 2229 times)

Offline evildani

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Looking for persistence advice
« on: April 17, 2008, 09:21:02 AM »
I have a problem in one of our clients.

They have a application that called "Banking".

The farm consists of 10 servers all running the same configuration and same software version.

Right now the Netscaler is using SSL Session ID as the persistence method, a few months we used Cookie Insert, and run on some trouble because some clients got their session expired from the system, so we figured that there was some kind of problem with the cookie, so we switched to SSL session id.

They log on, and when they try to use any thing on the page, they are shown with the Session expire page. We havent been able to reproduce the problem; but we have another client with the same infrastructure and the same applications and they do not have the problem. Or at least they havent reported it. BTW Both clients share the same NS 8.0 Build 53.

What we do is we have a CS vserver with a rule that directs all the relevant traffic to that server farm, and thats about it, nothing fancy or rare. The persistance is configured in the not reachable directly vserver on lb.

Any advice, or any hits on what the problem may be?

Thanks a lot

Daniel

Offline TheOracle

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Re: Looking for persistence advice
« Reply #1 on: April 17, 2008, 09:56:36 AM »
Set the cookie persistence timeout to 0.  Chances are the time on the NS, and the time on the server (in the date header) are out of sync, which will mess up the client's cookie timeout logic.  Setting to zero makes it a session cookie, and resolves this issue.

As a side note, using ssl session id is generally a bad idea--IE will renegotiate the session ever two minutes.  Chances are you are really relying on backup persistence of source IP to keep this from impacting your customers.

The Oracle

Offline evildani

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Re: Looking for persistence advice
« Reply #2 on: April 17, 2008, 11:58:38 AM »
You are absolutly right!
Here is the link:
http://support.microsoft.com/?scid=kb%3Ben-us%3B265369&x=13&y=10

Changing the Persistancy method has any impact on users? Loose any sessions?

I am going to program it for tonight midnight.

Thanks

Daniel