Tag Archives: Technical

Big Data – Storage Mediums & Data Structures

February 13, 2013

1 Comment

My working title was Big Data, Storage Dilemma.

They say dilemma. I say dilemna. I’m serious. I spell it dilemna.

Big Data presents something of a storage dilemma. There is no one data store to rule them all.

Should different data structures be persisted to different storage mediums?

[…]

Continue reading...

RHEL / OpenJDK – Performance Tuning

January 8, 2013

9 Comments

This post highlights three performance tuning techniques for Red Hat Enterprise Linux (6.2) and OpenJDK (1.6): TCP send / receive windows, large page memory, and i-CMS.

[…]

Continue reading...

Concurrent, High Throughput Performance Testing with JMeter

July 31, 2012

1 Comment

This post highlights a few tips that may be necessary to identify the maximum concurrent throughput of one or more application servers with JMeter. They include TCP / IP tuning, load balancer tuning, and garbage collection tuning.

[…]

Continue reading...

Know your ulimits.

July 27, 2012

0 Comments

When running Apache HTTP Server 2.2 and / or JBoss Enterprise Application Platform (EAP) 6 on Red Hat Enterprise Linux (RHEL) 6 with a high number of concurrent connections, the user resource limits may need to be changed.

This post highlights two scenarios where the user resource limits may need to be changed: the maximum number of user processes is too low, the maximum number of open files is too low.
[…]

Continue reading...

Generate a Web Service (JAX-WS) Client with Maven

April 3, 2012

3 Comments

Generating a web service (JAX-WS) client with Maven is a two step process. The first step is generate a WSDL document from the JAX-WS annotated class. The next step is to generate the Java client from the generated WSDL document.

[…]

Continue reading...