Articles in the Clustering Category
Clustering, Featured, Glassfish, Headline, Java, Shell »
I have several clusters with Glassfish 2.1.1 in a BIG virtual environment and all worked fine … until I add new processors to this clusters. After upgrade, I started to have problems with HttpSession replication. Starting debugging JXTA, Shoal and the Web Container didn’t help at all. Until I found this page Memory Replication & Multi-threaded Concurrent Access to HttpSessions. My applications was doing multi-thread concurrent access some times (Ajax) and this was the root cause of all lost sessions. I modified sun-web.xml from my application, accordingly with the …
Clustering, Featured, Glassfish, Headline, How-to, Java »
For some reasons the asupgrade tool from Sun Glassfish doesn’t work if you want to upgrade your Glassfish from 2.1 to 2.1.1. The upgrade method what I will present you in the next post, probably, is not recommended by SUN, but it will work in most cases (clustered or not). Just follow this steps:
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Clustering, Glassfish, How-to, Java, Newbie »
Why you should do that? All this ports, by default, are allocated dynamically and if you want to use a firewall between your client and JMS broker then you should have static ports assigned. Another solution is to tunnel through httpjms and httpsjms protocol but this are slow. In the next article I will show you how to assign static ports to this JMS service in Glassfish. To show you the all ports what need for JMS I just “ripped” the following table from SUN Site: http://docs.sun.com/app/docs/doc/820-4916/gcuhq?a=view
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Clustering, Debian, Featured, Glassfish, Headline, Java, Linux »
If you want 99.999% availability of your Glassfish cluster then you should do 2 things: 1. Use HADB for user HTTP and Session persistence, 2. get some SUN support. I cannot help you with the decision on point 2, but with point 1 I will show you how to doit.In this article I will NOT start again to show you how to configure a Glassfish cluster, because this is already made in this article. Today I will present how to add HADB functionality to a existent Glassfish cluster.
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Clustering, Debian, Featured, How-to, Linux, Recovery, Shell »
Monitoring is one of the most vital part of all online business right now. A server what fail to deliver its content to a client it’s a big problem, because of this server disruptive service or downtime is our the worst enemies. Some downtimes are impossible to be predicted and monitoring your system is the best thing you can do. Did you ever asked yourself what means 99% availability? 7 hours per month of downtime. 7 hours for a client can be very frustrating.
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