Purpose of this blog

Hi, I wanted to create this blog to document some of the coding work I'd like to do, mostly in Ruby and iPhone development. This is mostly for me so I don't forget what I work on, but I hope it's helpful to anyone out there.

I'm still primarily interested in Ruby on Rails but Sinatra is looking very interesting as a simple Ruby framework for building applications without a database.

Stay tuned for more stuff!

Comments

Building a Hadoop cluster

I've recently had to build a Hadoop cluster for a class in information retrieval . My final project involved building a Hadoop cluster. Here are some of my notes on configuring the nodes in the cluster. These links on configuring a single node cluster and multi node cluster were the most helpful. I downloaded the latest Hadoop distribution then moved it into /hadoop. I had problems with this latest distribution (v.21) so I used v.20 instead. Here are the configuration files I changed: core-site.xml: fs.default.name hdfs://master:9000 hadoop.tmp.dir /hadoop/tmp A base for other temporary directories. hadoop-env.sh: # Variables required by Mahout export HADOOP_HOME=/hadoop export HADOOP_CONF_DIR=/hadoop/conf export MAHOUT_HOME=/Users/rpark/mahout PATH=/hadoop/bin:/Users/rpark/mahout/bin:$PATH # The java implementation to use. Required. export JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home hdfs-site

Creating a Hackintosh

I've always wanted to create a "Hackintosh", i.e. a standard PC that runs OS X. My PC is over 5 years old so it was time for a refresh. I figured this was the best time to give the Hackintosh a go. Hardware CPU: Intel Quad Core i7 4790 3.6 Ghz Motherboard: GIGABYTE GA-Z97-HD3 Audio: ALC 887 Network: Realtek 8111F-VL Network Card: 4 Antennas 802.11ac WiFi BCM94360CD Wireless Network Card Graphics Card: nVidia 750 GTX Memory: Corsair Vengeance DDR3-1600 32 GB (4x8 GB) Hard Drive : Seagate ST3000DM001 3 TB SATA3 7200 rpm DVD: Samsung SH-224DB 24X BIOS Changes The first step was to change the BIOS settings to support OS X. Disabling VT-d is the only setting that is clearly required; the others are questionable but were done by others so I thought they were worth trying. F7 to load Optimized Defaults M.I.T. Advanced Frequency Settings Extreme Memory Profile (X.M.P.): Enabled Miscellaneous Settings PCIe Slot Configuration: Gen

Connecting to SQL Server from OS X perl

I've been spending my coding time in the offhours working on Perl instead of Ruby. My coding time in general has been very limited, which is part of the reason for the length of time between updates. :) My latest project is to pull data out of a Microsoft SQL Server database for analysis. I'm using perl for various reasons: I need a crossplatform environment, and I need certain libraries that only work on perl. Some of the target users for my code run on Windows. I know that Ruby runs on Windows but it's not the platform of choice for Ruby developers. The vast majority seem to develop either on OS X or Linux. So Ruby on Windows isn't at the maturity that ActiveState perl is on Windows. In fact, I don't even run native perl anymore on my MacBook Pro. I've switched over to ActiveState perl because I don't need to compile anything every time I want to install new CPAN libraries. And because it's ActiveState, I'm that much more confident it will w

Thoughts on Product Management

Search This Blog