Programming

[Jan 15, 2012 | Views: 238]

Hadoop’s namenode and datanodes expose a bunch of TCP ports used by Hadoop’s daemons to communicate to each other or listen directly to users’ requests. These ports information are needed ... read more »

Simple Sort Benchmark on Hadoop

[Jan 8, 2012 | Views: 307]

After installing Hadoop, we usually run some benchmark programs to test whether the system works well. In the post of Hadoop install tutorial, we show a very simple to grep ... read more »

Pitfalls and Lessons on Configuing and Tuning Hadoop

[Apr 26, 2011 | Views: 302]

This post lists pitfalls and lessons learning when configuring and tuning Hadoop. Hadoop with IPv6 Hadoo doesn’t support IPv6 currently (up to 0.20.2 and 0.21.0): Hadoop and IPv6. The performance of the ... read more »

Setting Up Standalone (Local) Hadoop

[Apr 6, 2011 | Views: 412]

Hadoop is designed to run on hundreds to thousands of computers inside cluster. However, Hadoop is configured to run things in a non-distributed ... read more »