Apache Chukwa is an open source large-scale log collection system for monitoring large distributed systems. It is one of the common big data terms related to Hadoop. It is built on the top of Hadoop Distributed File System (HDFS) and Map/Reduce framework. It inherits Hadoop’s robustness and scalability. Chukwa contains a powerful and flexible toolkit database for monitoring, displaying, and analyzing results so that collected data can be used in the best possible ways.