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In this blog post I'll go through an example, in repeatable steps, of how to get up and running with the Tornado chat demo on ActiveState's public sandbox for Stackato. ActiveState's Stackato PaaS (Platform-as-a-Service) is based on VMware's open-source PaaS, Cloud Foundry, and offers an enterprise PaaS solution that will run on any public cloud, private cloud, laptop or desktop.

Geohashing is a simple way to encode latitude and longitude and grouping nearby points on the globe with varying resolutions. It was created by Gustavo Niemeyer. This blog post looks at how it's implemented any why it is such an elegant solution for encoding and managing location-based data.

In this post I will explain the concept behind zero-copy, which is feature of the Linux allowing for faster transfer of data between pipes, file-descriptors and sockets. I will demonstrate how you can use this functionality in your Ruby projects using a code example. This functionality has been implemented in C, Java, Ruby, Perl and nameless other languages, but in this blog I will focus on the Ruby usage.