From: Jin Yao <jin.yao_at_ericsson.com>
Date: Mon, 8 Mar 2010 16:56:04 +0800

Hi Kshitiz,

 Thank you.

 But actually I have tried convert the app into a converged app （sip&web） by including a empty sip.xml , the CLB not works either.

 We try to login our application, the expected behavior is that the app received error response(authentication failed), then the browser will display some error message to end user.
 but actually we could not get error response, no error message displayed on the browser.
 While we disable LB on one PL instance (which mean just one PL work), then it works correctly, the error message displayed!

But, to make it more clear, for pure web application(including session based), nothing need to do to enable CLB ,except to make sure the PL instance active and LB enabled , if the sticky round robin algorithm works well, just the web container to auto detect and apply the correct CLB algorithm, right?

Br,Jin

________________________________
From: Kshitiz.Saxena_at_Sun.COM [mailto:Kshitiz.Saxena_at_Sun.COM]
Sent: 2010年3月8日 15:50
To: dev_at_glassfish.dev.java.net
Subject: Re: Need you help on CLB

Hi Jin,

Yes, you are correct about requests belonging to pure web applications being distributed using sticky round robin algorithm. All new requests will be distributed in round robin manner across active(healthy + enabled) instances. All subsequent requests belonging to a session(i.e. first request created session) will be send to instance which serviced first request. This behavior will be followed until and unless that instance goes down and subsequent requests need to be failed over.

DCR is applied for pure sip and converged application. To convert pure web application to converged application, you can include empty sip.xml.

From stats you provided, it looks like all four requests(stats TotalIncomingHttpRequestsBE) were serviced by same backend. Even though both FE got 2 requests each(stats TotalIncomingHttpRequestsFE), they were eventually serviced by PL-2_4.

Thanks,
Kshitiz

On Monday 08 March 2010 10:27 AM, Jin Yao wrote:
Hi ,

We 're developing web application on SGCS, we encounter problems on data centric, it seems the data-centric not works

This is our dcr file

We installed dcr using the following commands
SC_2_1# asadmin set-dcr-file --clbname traffic_lb /home/wuigm/data-centric-rules.xml
SC_2_1# asadmin set traffic-config.availability-service.converged-load-balancer.auto-commit=true

We can see the file in console page

[cid:173465907_at_08032010-06F5]

But the CLB seems not work.

If try to login WUIGM 4 times, In PL monitor log,
On PL-2_4 TotalIncomingHttpRequestsBE count value is 4 TotalIncomingHttpRequestsFE value is 2
On PL-2_3 TotalIncomingHttpRequestsBE count value is 0 TotalIncomingHttpRequestsFE value is 2

Do you know, What the problem is?
BTW: It's a pure web application! I have find some thing about CLB.
it's said "HTTP and HTTPS messages belonging to pure web applications, the converged load balancer uses a sticky round robin algorithm" ,then what's the sticky round robin
what should web application do to enable this
Does the DCR file not work for pure web application?

Thanks in advance!

Br,Jin