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Apache Hadoop (/ h ə ˈ d uː p /) is a collection of open-source software utilities for reliable, scalable, distributed computing.It provides a software framework for distributed storage and processing of big data using the MapReduce programming model.
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MapReduce is a programming model and an associated implementation for processing and generating big data sets with a parallel and distributed algorithm on a cluster. [1] [2] [3]A MapReduce program is composed of a map procedure, which performs filtering and sorting (such as sorting students by first name into queues, one queue for each name), and a reduce method, which performs a summary ...
For Dummies is an extensive series of instructional reference books which are intended to present non-intimidating guides for readers new to the various topics covered. The series has been a worldwide success with editions in numerous languages.
It is a system built on top of Apache Hadoop, Apache ZooKeeper, and Apache Thrift. Written in Java , Accumulo has cell-level access labels and server-side programming mechanisms. According to DB-Engines ranking , Accumulo is the third most popular NoSQL wide column store behind Apache Cassandra and HBase and the 67th most popular database ...
Apache Hive is a data warehouse software project. It is built on top of Apache Hadoop for providing data query and analysis. [3] [4] Hive gives an SQL-like interface to query data stored in various databases and file systems that integrate with Hadoop.
Apache Parquet is a free and open-source column-oriented data storage format in the Apache Hadoop ecosystem. It is similar to RCFile and ORC, the other columnar-storage file formats in Hadoop, and is compatible with most of the data processing frameworks around Hadoop.
input_lines = LOAD '/tmp/my-copy-of-all-pages-on-internet' AS (line: chararray);-- Extract words from each line and put them into a pig bag-- datatype, then flatten the bag to get one word on each row words = FOREACH input_lines GENERATE FLATTEN (TOKENIZE (line)) AS word; -- filter out any words that are just white spaces filtered_words = FILTER words BY word MATCHES '\\w+';-- create a group ...