EC2 spot instance price change: no correlation with day of week

My plans for world domination involve heavy use of Amazon EC2 instances, but I have to be frugal about it so I’m running spot instances to save cash. Therefore a means of forecasting spot instance prices would be helpful. Thus far I’ve had little success using mainstream forecasting tools such as ARIMA and exponential smoothing. […]

setting up an Amazon RDS instance on a VPC private subnet

As a scientist, I tend not to think about database security much. However, security is an important concern for the database-driven web applications I write, so I decided to learn more about how to use Amazon EC2 and RDS instances securely. As part of this effort, I created a virtual private cloud (VPC) to hide my […]

test driving the Kepler scientific workflow system

The Kepler scientific workflow system enables scientists and engineers to specify their software pipelines as chains of visual dependencies. Each node in a pipeline runs a specific task, and it does not matter what programming language the task is written in since Kepler only manages the inputs and outputs of each step. Here I describe […]

test driving the Seven Bridges Genomics bioinformatics platform

I recently examined the Seven Bridges Genomics (SBG) platform, building and running a short-read alignment pipeline. Overall, I am impressed by the software. Here I describe my test of the program and then report on my investigation of how it works. Test Drive The test pipeline I devised consisted of two steps, FastQC analysis of […]