The Hadoop documentation includes the information you need to get started using Hadoop.

The Fair Scheduler supports dynamic hierarchical user queues, user queues are created dynamically at runtime under any specified parent-queue.The timeline store in YARN, used for storing generic and application-specific information for applications, supports authentication through Kerberos.Users can submit and kill applications through REST APIs. YARN’s REST APIs now support write/modify operations.The SecondaryNameNode, JournalNode, and DataNode web UIs have been modernized with HTML5 and Javascript.The Hadoop portmapper is no longer required to run the gateway, and the gateway is now able to reject connections from unprivileged ports. The NFS gateway received a number of supportability improvements and bug fixes.Using the OfflineImageViewer, clients can now browse an fsimage via the WebHDFS API.See the user documentation for more details. Support for POSIX-style filesystem extended attributes.Specification work related to the Hadoop Compatible Filesystem (HCFS) effort.

A new Hadoop metrics sink that allows writing directly to Graphite.This is useful when accessing WebHDFS via a proxy server. Authentication improvements when using an HTTP proxy server.Here is a short overview of the major features and improvements. Compatibilty between Hadoop 1.x and Hadoop 2.xĪpache Hadoop 2.7.3 is a minor release in the 2.x.y release line, building upon the previous stable release 2.7.2.

Nod32 7.3