Hi, don’t know if it’s a good idea to have a setup like this. From my point of view session sharing is used to provide some kind of high availability.
We setup session sharing and had a config mistake regarding too short timeouts. This led to frequent session “hopping” between several midtier instances. This in turn corrupted the session information, because more than one midtier was updating the session data within a short timeframe, overwriting some critical things. I highly recommend to use Cookie based persistence. In our case we do not rely on loadbalancer features. We’re using apache httpd in reverse proxy configuration to accomplish this. The loadbalancer routes to at least two httpd instances. Httpd takes care of routing the request to the right midtier based on session cookie. KR Conny Von: ARSList <[email protected]> Im Auftrag von LJ LongWing Gesendet: Dienstag, 5. März 2019 16:54 An: ARSList <[email protected]> Betreff: Re: Load Balancing and Session Timeouts JD, If you are on 9.x, you can configure Session Sharing (clustering) in your Mid-Tier containers, and then you wouldn't need sticky bits (persistence) On Tue, Mar 5, 2019 at 8:49 AM JD Hood <[email protected]<mailto:[email protected]>> wrote: All, We have a simple load balancing arrangement between a Netscaler and two SSL Mid tiers (v18.08). End users are sporadically encountering session timeout errors when they would not be expected. Sometimes within a few minutes of connecting and in the midst of creating a new incident, they will get a session timeout error (arerr 9201) and they will have to refresh the page and re-authenticate. I've found the following BMC Support KB and shared it with the team: https://bmcsites.force.com/casemgmt/sc_KnowledgeArticle?sfdcid=kA214000000d7ZtCAI Our netscaler resource advises that the cookie-based persistence option is not available when he is configuring load-balancing. I believe he is configuring persistence as IP based. Other than that, we can't identify any non-recommended configuration issues. I suspect that the cookie-based load balancer configuration is significant, but not being a LB expert, it's outside of my skillset and my most convincing argument at the moment is, "...because BMC Support recommends it..." Does anyone have any experience with a basic, simple Netscaler configuration to balance two SSL Mid tiers based on least number of connections (or any other strategy)? Or perhaps session timeouts are a known issue for other reasons that I have yet to stumble across? Thanks, -JDHood -- ARSList mailing list [email protected]<mailto:[email protected]> https://mailman.rrr.se/cgi/listinfo/arslist
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