Hadoop 2.7

Hadoop 2.7 is a specific version of the Apache Hadoop framework, which is an open-source distributed storage and processing system for big data. Hadoop 2.7 is part of the Hadoop 2.x series and introduced several improvements and features compared to earlier versions. Here are some key highlights of Hadoop 2.7:

1. YARN (Yet Another Resource Negotiator):

   • Hadoop 2.7 continued to use YARN as the resource management framework. YARN allows multiple data processing engines to run on the same Hadoop cluster, making it more versatile and suitable for various workloads.

2. HDFS (Hadoop Distributed File System):

   • Hadoop 2.7 includes enhancements and improvements in HDFS, the storage component of Hadoop. It introduced features like Rolling Upgrades, Heterogeneous Storage, and improved NameNode High Availability (HA).

3. MapReduce:

   • MapReduce, the original data processing model in Hadoop, received optimizations and improvements in Hadoop 2.7. These enhancements improved the performance and scalability of MapReduce jobs.

4. Hadoop Common:

   • The Hadoop Common module, which contains libraries and utilities shared across various Hadoop components, was updated in Hadoop 2.7 to include bug fixes and improvements.

5. Hadoop Ecosystem Integration:

   • Hadoop 2.7 is compatible with various ecosystem projects such as Apache Hive, Apache Pig, Apache HBase, and Apache Spark. This allows users to leverage a wide range of tools and libraries for data processing and analytics.

6. Security Enhancements:

   • Security features like Kerberos authentication, Access Control Lists (ACLs), and encryption were further strengthened in Hadoop 2.7 to ensure the protection of data and cluster resources.

7. Performance Improvements:

   • Hadoop 2.7 introduced performance enhancements in terms of cluster resource utilization, data locality, and job execution speed. These improvements aimed to make Hadoop more efficient for large-scale data processing.

8. Bug Fixes and Stability:

   • Like any major release, Hadoop 2.7 addressed various bugs and stability issues found in earlier versions, making it a more reliable choice for production environments.

9. Community Contributions:

   • Hadoop 2.7 benefited from contributions from the open-source community, including bug reports, code contributions, and improvements based on user feedback.