Notes/Domino XPages Development Forum - Pagination is not working perfectly in cluster environment with load balancer

May 6, 2013, 11:56 AM

2 Posts

Re: Pagination is not working perfectly in cluster environment with load balancer

It sounds like the problem is in the Load Balancer, as you yourself have said.

You need to change it to put a user towards 1 of your servers and keep them to that server.

That is out of the scope for this forums most likely as we don't know what load balancer you use.

The problem with the xpage app is most likely that the application uses session or app scope to keep track of where each user is.

If your load balancer use "round robin" style to spread every other request to each domino server you loose that app or session scope across the servers.

~Yentl Fezlulitakoi

May 6, 2013, 3:30 PM

7 Posts

Re: Pagination is not working perfectly in cluster environment with load balancer

Thanx for your prompt response,

We are using the Hardware Load Balance Server with round robin fashion, Is there any setting on domino server or in application level to maintain the session with one member service till it is not getting busy.

~Evelyn Brealitakoi

May 12, 2013, 7:14 AM

13 Posts

Re: Pagination is not working perfectly in cluster environment with load balancer

We use Http rev proxy in front of 4 clustered domino servers. ISA rev proxy server has "sticky" sessions, I.e, once rev proxy successfully passes user to a server, it issues web client with a cookie, this ensures each subsequent request goes to that individual target server. If that server can't be reached, it found robin user to new target server, issues new cookie, etc. we use this with great success on a heavily loaded app. So they key thing you need to find out is if your rev proxy can deal with "sticky" sessions. 99.99% of the time, the benefits of the rev proxy are just great, until the rev proxy crashes...doh! We don't have budget for more robust rev proxy solution.