HBase
Top 30 Hbase Interview Questions & Answers
Download PDF Following are frequently asked questions in interviews for freshers as well...
HBase is an open-source, column-oriented distributed database system in a Hadoop environment. Initially, it was Google Big Table, afterward, it was re-named as HBase and is primarily written in Java. Apache HBase is needed for real-time Big Data applications.
HBase can store massive amounts of data from terabytes to petabytes. The tables present in HBase consists of billions of rows having millions of columns. HBase is built for low latency operations, which is having some specific features compared to traditional relational models.
HBase Unique Features
Tutorial | HBase Architecture, Components, and Use Cases |
Tutorial | HBase Installation on Ubuntu |
Tutorial | HBase Shell and General Commands |
Tutorial | HBase Create Table with Example |
Tutorial | Insert & Retrieve Data in HBase: get(), put(), scan() Examples |
Tutorial | HBase Advantage, Limitations & Performance Bottleneck |
Tutorial | Hbase Interview Questions & Answers |
A table for a popular web application may consist of billions of rows. If we want to search particular row from such a huge amount of data, HBase is the ideal choice as query fetch time in less. Most of the online analytics applications use HBase.
Traditional relational data models fail to meet performance requirements of very big databases. These performance and processing limitations can be overcome by Apache HBase.
In big data analytics, Hadoop plays a vital role in solving typical business problems by managing large data sets and gives the best solutions in analytics domain.
In the Hadoop ecosystem, each component plays its unique role for the
In terms of storing unstructured, semi-structured data storage as well as retrieval of such data's, relational databases are less useful. Also, fetching results by applying query on huge data sets that are stored in Hadoop storage is a challenging task. NoSQL storage technologies provide the best solution for faster querying on huge datasets.
Some of the NoSQL models present in the market are Cassandra, MongoDB, and CouchDB. Each of these models has different ways of storage mechanism.
For example, MongoDB is a document-oriented database from the NoSQL family tree. Compared to traditional databases it provides the best features in terms of performance, availability, and scalability. It is an open source document-oriented database, and it's written in C++.
Cassandra is also a distributed database from open source Apache software which is designed to handle a huge amount of data stored across commodity servers. Cassandra provides high availability with no single point of failure.
While CouchDB is a document-oriented database in which each document fields are stored in key-value maps.
HBase storage model is different from other NoSQL models discussed above. This can be stated as follow
MongoDB, CouchDB, and Cassandra are of NoSQL type databases that are feature specific and used as per their business needs. Here, we have listed out different NoSQL database as per their use case.
Data Base Type Based on Feature | Example of Database | Use case (When to Use) |
Key/ Value | Redis, MemcacheDB | Caching, Queue-ing, Distributing information |
Column-Oriented | Cassandra, HBase | Scaling, Keeping Unstructured, non-volatile |
Document-Oriented | MongoDB, Couchbase | Nested Information, JavaScript friendly |
Graph-Based | OrientDB, Neo4J | Handling Complex relational information. Modeling and Handling classification. |
Features | HBase | Hive |
Data base model | Wide Column store | Relational DBMS |
Data Schema | Schema- free | With Schema |
SQL Support | No | Yes it uses HQL(Hive query language) |
Partition methods | Sharding | Sharding |
Consistency Level | Immediate Consistency | Eventual Consistency |
Secondary indexes | No | Yes |
Replication Methods | Selectable replication factor | Selectable replication factor |
While comparing HBase with Traditional Relational databases, we have to take three key areas into consideration. Those are data model, data storage, and data diversity.
HBASE | RDBMS |
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Summary:-
HBase provides unique features and will solve typical industrial use cases. As column-oriented storage, it provides fast querying, fetching of results and high amount of data storage. This course is a complete step by step introduction to HBase.
Download PDF Following are frequently asked questions in interviews for freshers as well...
In HBase, we can create table operations in two ways Shell command JAVA API We will learn to use...
In this tutorial- you will learn, Apache HBase Installation Modes How to Download Hbase tar file...
HBase architecture always has " Single Point Of Failure " feature, and there is no exception...
In this tutorial, you will learn: Write Data to HBase Table: Shell Read Data from HBase Table:...
After successful installation of HBase on top of Hadoop, we get an interactive shell to execute...