Hadoop Distributed File System (HDFS) –
The Hadoop Distributed File System (HDFS) is a sub-project of the Apache Hadoop project. This Apache Software Foundation project is designed to provide a fault-tolerant file system designed to run on commodity hardware.
According to The Apache Software Foundation, the primary objective of HDFS is to store data reliably even in the presence of failures including NameNode failures, DataNode failures and network partitions. The NameNode is a single point of failure for the HDFS cluster and a DataNode stores data in the Hadoop file management system.
HDFS uses a master/slave architecture in which one device (the master) controls one or more other devices (the slaves). The HDFS cluster consists of a single NameNode and a master server manages the file system namespace and regulates access to files.
Read Also:
- Commodity Cluster Computing
Refers to using a large number of low-cost, low-performance commodity computers working in parallel instead of using fewer high-performance and high-cost computers.
- Commodity Hardware
Computer hardware that is affordable and easy to obtain. Typically it is a low-performance system that is IBM PC-compatible and is capable of running Microsoft Windows, Linux, or MS-DOS without requiring any special devices or equipment.
- iPod Shuffle
The smallest device in Apple’s lineup of iPod digital portable music players. Now in its fourth generation, the iPod Shuffle features an all-metal, unibody design with an integrated belt clip for listening to the player in a hands-free fashion, as well as 2GB of flash memory storage and VoiceOver capabilities for audibly reporting song details […]
- Lightning Connector
An 8-pin power connector developed by Apple, Inc. in 2012 as a replacement for the traditional 30-pin connector previously used on Apple devices like the iPhone, iPad and iPod touch. The Lightning Connector is currently utilized by the iPhone 5, iPad Mini, fourth generation iPad (iPad 4), fifth generation iPod touch and seventh generation iPod […]
- iPod Nano
A small portable music player that fits in between the smaller iPod Shuffle and the larger iPod touch in Apple’s lineup of iPod devices. Now in its seventh generation, the 2012 version of the iPod Nano provides a smartphone-style iPhone-like interface with 16GB of flash memory storage, multi-touch support, Bluetooth compatibility, video playback capabilities, redesigned […]