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| HBase in Big Data | IndianTechnoEra |
What is HBase?
HBase is a distributed, column-oriented NoSQL database built on top of the Apache Hadoop framework.
It is used for storing large amounts of structured or semi-structured data and provides random real-time read/write access to this data.
It is designed to scale horizontally across multiple commodity servers, providing a fault-tolerant way of storing and processing data.
HBase is designed to provide fast, random access to data stored in large tables.
It can scale horizontally across multiple servers and provides fault tolerance, allowing the system to continue to operate even if a server fails.
HBase tables are composed of rows and columns, and data is stored in cells. Data can be retrieved using primary keys, row keys, and column keys.
HBase Architecture
Concepts of hbase
1. Table: Tables are the basic data structure in HBase. They store the data in a row-based format.
2. Row: A row is the unit of data in an HBase table. It consists of a unique key and a set of columns.
3. Column Family: A column family is a group of related columns in an HBase table. All columns in a column family share the same name and have the same data type.
4. Region: A region is a group of rows in an HBase table. It is the basic unit of data storage in HBase.
5. Region Server: A region server is a process that runs on a server and manages the regions of an HBase table.
6. Zookeeper: Zookeeper is a distributed coordination service used to manage the cluster state. It keeps track of the region servers, their load and other configuration information.
7. Master: The master is the process that manages the region servers and is responsible for assigning regions to servers and balancing the load across the cluster.
Clients of Hbase
1. Adobe
2. Apple
3. Amazon
4. eBay
5. Etsy
6. Facebook
7. Google
8. LinkedIn
9. Microsoft
10. Netflix
11. Twitter
12. Yahoo!
13. Yelp
What are the example of HBase?
Examples of HBase include:
1. Facebook Messenger: Facebook uses HBase to store messages and conversations.
2. Adobe Experience Manager: Adobe uses HBase to store customer profile data and metadata.
3. LinkedIn: LinkedIn uses HBase to store profile data, connections and messages.
4. Twitter: Twitter uses HBase to store Tweets.
5. Netflix: Netflix uses HBase to store user data and metadata.
What is zookeeper in HBase?
Zookeeper is a distributed coordination service that is used in HBase for distributed synchronization, configuration management, and providing group services.
It is an important part of the HBase architecture, as it provides an efficient way to coordinate the activities of the HBase cluster. Zookeeper also plays a key role in maintaining the cluster's state, so that it can be recovered in the event of a failure.
HBase vs RDMBS
What is big sql?
Big SQL is a massively parallel processing (MPP) SQL query engine for Apache Hadoop. It is a SQL-on-Hadoop technology that allows a variety of data sources, including HDFS, HBase, and traditional data warehouses, to be queried using a single SQL-based interface. It integrates with existing Hadoop components and can run on Hadoop clusters, helping to improve query performance and reduce system complexity.
HBase Commands
A list of HBase commands are given below.
1. Create a Table - CREATE 'table_name', 'column_family_name'
2. List all Tables - LIST
3. Insert Data - PUT 'table_name', 'row_key', 'column_family_name:column_name', 'value'
4. Get Data - GET 'table_name', 'row_key'
5. Scan - SCAN 'table_name'
6. Delete Data - DELETE 'table_name', 'row_key'
7. Delete Table - DISABLE 'table_name' and DROP 'table_name'