IT

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Ganglia in the cloud ( unicast instead of multicast )

Last time, I talked about how much I like using Ganglia for monitoring a large number of distributed servers. One of the issues I ran into that is barely covered in the documentation is how to set this up if you cannot use multicast.  Multicast is the default method that ganglia uses to discover nodes. [...]

By | June 10th, 2013|cloud, cloud computing, EC2, IT, Linux|Comments Off on Ganglia in the cloud ( unicast instead of multicast )

SQL NoSQL Why Choose?

Let's quickly take a look at the strengths and weakness of current SQL and NoSQL databases with an eye towards where they are today!  Its clear there is tremendous investment and development extending both SQL an NoSQL solutions (often to provide functions inherent in the other!) and over time innovation will close these gaps.  Exactly when and how [...]

By | June 7th, 2013|Big Data, BigSQL, Hadoop, IT, OpenSCG|Comments Off on SQL NoSQL Why Choose?

Ganglia monitoring of large (and small) clusters

Lately, I've been spending more time back in the performance testing world.  The problem is that the testing we're doing is taking days and in some cases, weeks to run.  No matter how diligent you are, you're not going to be staring at your CPU / memory graphs the whole time.  The question is, what [...]

By | May 24th, 2013|Big Data, cloud, cloud computing, IT|Comments Off on Ganglia monitoring of large (and small) clusters

Hadoop Hive Tutorial – Zero to Results in 15 Minutes

This Tutorial will walk through using Hadoop's Hive to access data stored in HDFS.  This is the first tutorial (more to follow) and covers installing Hadoop as part of BigSQL and running some simple queries. The Platform:  Linux (RHEL, CentOS or Ubuntu) or Mac OSX.  The Hadoop and Postgres Install was from www.BigSQL.org.  Takes about [...]

By | May 23rd, 2013|Big Data, BigSQL, Global Development, Hadoop, IT, OpenSCG, OpenSource|Comments Off on Hadoop Hive Tutorial – Zero to Results in 15 Minutes

PostgreSQL Clustering with Postgres HA

PostgreSQL Clustering made easy with PostgresHA. Authored jointly with Scott Mead, Sr. Architect OpenSCG and Architect of PostgresHA. PostgresHA is Highly Available (HA) PostgreSQL. High Availability High availability is not new. Financial trading systems and the telephone network were federally mandated to provide highly availability. People didn’t do HA because it was a fun project, [...]

By | April 17th, 2013|High Availability, IT, Linux, OpenSCG, OpenSource, PostgreSQL|Comments Off on PostgreSQL Clustering with Postgres HA

Relational Data

The Structure of a Relational Database. Database is a term that can mean different but similar things depending on context. Database may refer to the instance, the data or the server. Useful shorthand but sufficiently broad that unless you have the context, meaningless. If you have sufficient context, the words "The production receivables master database [...]

By | April 10th, 2013|Big Data, BigSQL, IT|Comments Off on Relational Data