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Cassandra – migrating from 0.6 to 0.7
I recently moved from playing with Cassandra 0.6 to playing with Cassandra 0.7 beta. One of the problems I ran into was this one: keyspace does not exist This is why: Prior to 0.7, cassandra loaded a...
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Gwtissandra: GWT + Hector + Cassandra
A Twitter Clone Clone I built a toy application (Gwtissandra) to better understand Cassandra’s data model and new features of Cassandra 0.7, such as secondary indices and flexible schema updates....
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WipeCoin Startup
As a serial entrepreneur, my goal is to start one company per year. This year, two friends and I invented WipeCoin, a revolutionary cleaning mechanism for smartphones: the combination of a case with a...
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Scala – Getting Started (1)
There are many operating systems and IDEs. I will cover my favorites briefly. Installing Scala on Ubuntu (10.04 LTS) Now re-start your shell. Reference:...
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Scala – Getting Started (2)
Scala by Example Methods Output: Hello, Markus Whazzup, Markus In Scala methods, you can define default values, such as greeting: String = "Hello" in the example shown above. This is a nifty...
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Is Facebook worth $50Bn?
Is the Goldman Sachs valuation of $50Bn for Facebook reasonable? Here is what we know about Facebook: > 500 Mio active users 50% of active users log on to Facebook in any given day The average user...
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CAP Revisited
PACELC I just found out about an excellent blog post on the CAP theorem by Daniel Abadi. I agree with his assertions that the CAP theorem is somewhat confusion and like the concept of PACELC. In my...
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Open Source PaaS – Solving the Hold-up Problem in Cloud Computing
CloudAve contributor Krishnan Subramanian discusses the recent trends in the enterprise PaaS space. He distinguishes three models of service delivery: the Heroku Model, the Amazon Model, and the...
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Notes from geekSessions – Network and Infrastructure Scalability
Here are my notes from today’s geekSessions 2.2 in San Francisco: Allan Leinwand, CTO Zynga Allan gave a short talk on Zynga’s infrastructure, in particular Z Cloud, and Amazon EC2-compatible private...
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Do Cloudfoundry and OpenShift have a Future?
I am wondering if Cloudfoundry and OpenShift will become success stories (like Amazon Web Services). The idea of an open source application serving platform sounds intriguing, however, the community...
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