Category Archives: J2EE

Infrastructure as a Service (IaaS) – Why? What about security? What about SOA?

IaaS or “Infrastructure as a Service” is a concept and frequently offered product in the Cloud Computing space that currently appears to have as much pervasiveness as any of the other service types. Continue reading →

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Error Checking vs. Exception Trapping

With the increased popularity of older object oriented languages, and the increased pervasiveness of newer ones there is also an increased practice of using exceptions in place of checking return values. This is commonly seen in J2EE apps, and increasingly … Continue reading →

Posted in J2EE, Java | Tagged | 1 Comment

Fewer Large (heap size) JVMs vs Several Smaller JVMs

In the world of J2EE applications and their associated architectures, there is frequently a debate about the number and heap size of the JVMs to be used. The performance and resource “sweet spot” is highly dependent on the application and … Continue reading →

Posted in J2EE, Java, Sizing, Tuning | 1 Comment

[CheapHA-HPC] A Different Slightly Approach To Grid Computing

I’ve been working with a customer that has a surprisingly common workload – document management & processing, as well as very common constraints – no development staff with parallel programming (MPI, etc) expertise, no time to build a completely new … Continue reading →

Posted in Cloud Computing, J2EE, Java, Linux, Sizing, Storage, Tuning, VMWare, [CheapHA-HPC] | Tagged , , | Comments Off

[CheapHA-HPC] Part 1 – First Steps

This is part 1 in a multipart adventure into cost-efficient supercomputing and high availability. By now you’ve probably heard of Beowulf Linux clusters, HPC clusters made from PlayStations, the monsters listed at http://www.top500.org/, Amazon’s EC2/S3, and the like. Well, what … Continue reading →

Posted in J2EE, Java, Legacy, Linux, Models, Perl, Scripts, Sizing, Tuning, UNIX, [CheapHA-HPC] | 2 Comments