【Hadoop】HBase

HBase

HBase is an open-source non-relational distributed database

Use Apache HBas when you need random, realtime read/write access to your Big Data. This project’s goal is the hosting of very large tables – billions of rows X millions of columns – atop clusters of commodity hardware.

Apache HBase is an open-source, NoSQL, distributed big data store. It enables random, strictly consistent, real-time access to petabytes of data.

HBase is a column-oriented, non-relational database. This means that data is stored in individual columns, and indexed by a unique row key.

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Posted by Wei on 2023-09-22, Last Modified on 2024-09-25

【Hadoop】HBase Shell

Commands using HBase Shell

Listing a Table

# Listing a Table
list

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Posted by Wei on 2023-09-22, Last Modified on 2023-11-27

【Hadoop】Hive

Apache Hive

Apache Hive is a distributed, fault-tolerant data warehouse system that enables analytics at a massive scale.

Hive gives an SQL-like interface to query data stored in various databases and file systems that integrate with Hadoop.

Apache Hive supports the analysis of large datasets stored in Hadoop’s HDFS and compatible file systems such as Amazon S3 filesystem and Alluxio. It provides a SQL-like query language called HiveQL with schema on read and transparently converts queries to MapReduce, Apache Tez and Spark jobs.

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Posted by Wei on 2023-09-22, Last Modified on 2023-09-22

【Hadoop】学习

Hadoop

Hadoop allows the distributed processing of large data sets stored across clusters of computers.

The Hadoop framework consists of two main components

Hadoop Distributed File System (HDFS)
- HDFS is an open source variant of the Google File System (GFS)
MapReduce programming framework
- Hadoop MapReduce is the open source variant of Google MapReduce

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Posted by Wei on 2023-09-22, Last Modified on 2023-09-22

【Database】Entity Relationship (E-R) Diagrams

ER Diagrams

An Entity Relationship (ER) Diagram is a type of flowchart that illustrates how “entities” such as people, objects or concepts relate to each other within a system. ER Diagrams are most often used to design or debug relational databases in the fields of software engineering, business information systems, education and research. Also known as ERDs or ER Models, they use a defined set of symbols such as rectangles, diamonds, ovals and connecting lines to depict the interconnectedness of entities, relationships and their attributes. They mirror grammatical structure, with entities as nouns and relationships as verbs.

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Posted by Wei on 2023-09-19, Last Modified on 2023-11-24

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