What is Hadoop
Apache™ Hadoop® is an open source software project that enables distributed processing of large data sets across clusters of commodity servers. It is designed to scale up from a single server to thousands of machines, with very high degree of fault tolerance. Rather than relying on high-end hardware, the resiliency of these clusters comes from the software's ability to detect and handle failures at the application layer.
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Hadoop is supplemented by an ecosystem of Apache open-source projects that extend the value of Hadoop and improve its usability.
Data access projects
A programming language designed to handle any type of data, helping users to focus more on analyzing large data sets and less on writing map programs and reduce programs.
What is Pig?
A Hadoop runtime component that allows those fluent with SQL to write Hive Query Language (HQL) statements, which are similar to SQL statements. These are broken down into MapReduce jobs and executed across the cluster.
What is Hive?
A distributed, reliable and available service for efficiently collecting, aggregating and moving large amounts of log data. Its main goal is to deliver data from applications to the HDFS.
What is Flume?
A table and storage management service for Hadoop data that presents a table abstraction so the user does not need to know where or how the data is stored.
An Apache open source project that provides data serialization and data exchange services for Hadoop.
What is Avro?
An open-source cluster computing framework with in-memory analytics performance that is up to 100 times faster than MapReduce, depending on the application.
What is Spark?
An ELT tool to support the transfer of data between Hadoop and structured data sources.
A column-oriented non-relational (noSQL) database that runs on top of HDFS and is often used for sparse data sets.
What is HBase?
An enterprise search tool from the Apache Lucene project that offers powerful search capabilities, including hit highlighting, as well as indexing capabilities, reliability and scalability, a central configuration system, and failover and recovery.
Administration and security projects
A network authentication protocol that works on the basis of “tickets” to allow nodes communicating over a non-secure network to prove their identity to one another in a secure manner.
A centralized infrastructure and set of services that enable synchronization across a cluster.
What is Zookeeper?
A management application that simplifies workflow and coordination between MapReduce jobs.
What is Oozie?
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