The Tech Munch

Ruminations on Software and Technology

Monday, May 19, 2014

OpenStack - OpenVSwitch Agent won't register

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I hit the wall today when I tried to add an another compute node to my OpenStack. Everything seemed to install fine. However, the Openvswitc...
Friday, May 9, 2014

Adding your own configuration to OpenStack Neutron using oslo.config

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If you are doing OpenStack development,  eventually you will want to add your own configuration in OpenStack for you own plugin/mechanism dr...
Wednesday, April 9, 2014

Listen to OpenStack Neutron Messages from RabbitMQ using Kombu messaging library

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As I continue to investigate on how to write the plugin or more precise the mechanism driver for the neutron ml2 plugin. I would like to loo...
2 comments:
Saturday, April 5, 2014

Devstack with Oracle Enterprise Linux

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Currently I am working on a development of OpenStack Neutron plugin for a network switch. One of the OS I need to deploy on is Oracle Enterp...
Sunday, September 8, 2013

Prezi - What Power Point Should Be

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I have always found PowerPoint limiting and wanted to find a presentation tool that feels more natural and provides better story telling cap...
Sunday, June 30, 2013

A Few Tricks in Writing End-to-end JAX-RS Unit Tests with Mock Objects

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Lately I was helping a team migrating their spring mvc based web service to a JAX-RS based (more specifically, Jersey) implementation. When...
Sunday, November 25, 2012

Babbage's Difference Engine in Action

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I used the holiday season to visit the computer history museum in Mountain View. It was not the first time I had visited this wonderful ...
Tuesday, September 25, 2012

Thought on AWS's Fast I/O Instance

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A while back I wrote a blog on how to use Delphix in AWS cloud . It was sort of a thought experiment, because the performance of EBS was too...
Sunday, July 15, 2012

Exciting Python Machine Learning Package (scikit-learn)

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A while back, I blogged about using rpy2 to leverage the power of plotting and aplenty model selection of R in python. It's usable but s...
4 comments:
Sunday, June 10, 2012

How to Install rpy2 on Mac OS X 10.7 (Lion)

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Python and R are powerful tools for machine learning and data analysis. Like super heroes in movies, their power can be unmatched when comb...
Wednesday, May 23, 2012

Mechanical Symapthy

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I came across this article written by Martin Fowler http://martinfowler.com/articles/lmax.html Original I was looking for more info abou...
Friday, May 11, 2012

How to install R on Cloudera CDH3

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I wanted to play with the RHadoop package to see how R worked with Hadoop. Since the demo CDH3 image I was using from Cloudera did not bund...
Monday, April 30, 2012

HDFS - java.io.IOException: File XXX could only be replicated to 0 nodes, instead of 1

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I am playing with the Cloudera Manager lately. After installing the hdfs service successfully using Cloudera Manager, I hit the following er...
Monday, April 2, 2012

A simple R script to find the Pi

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Recently I am working on a data mining project and investigating on different visualization  and computation tools to help to analyze the da...
Tuesday, March 27, 2012

SVForum Big Data Conference Video Available

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Here is the link:  http://www.youtube.com/playlist?list=PL7CCD96639D8A3087
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  • Frederick Vong
  • Jiunjiun Ma
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