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PHPDifference Between RDBMS and Hadoop
Hadoop and RDBMS are a part of the data ecosystem but they are very different from each other while designing and implementing them. In this article, we will discuss the difference between RDBMS and Hadoop.
What is RDBMS?
The full form of RDBMS is Relational Database Management System. RDBMS is a system in which data is stored in tables which consists of rows and columns. A record is represented in the form of a row and attributes are represented through columns. A database is designed in RDBMS on the basis of the following properties:
- Atomicity
- Consistency
- Integrity
- Durability
RDBMS is made for the storage and retrieval of data as quickly as possible.
Components of RDBMS
The components of RDBMS are as follows ?
- Tables
- Rows
- Columns
- Keys
What is Hadoop?
Hadoop is an open-source software framework which is used to run different types of applications. Hadoop is also used to store data which can be retrieved as and when required. The processing power of the framework is very high and it also has the ability to manage multiple concurrent processes. Hadoop can be used for machine learning, data mining, and predictive analysis. Any form of data can be easily handled by Hadoop.
Components of Hadoop
The components of Hadoop are as follows ?
- HDFS (Hadoop Distributed File System)
- Yarn (Yet Another Resource Negotiator)
- Map Reduce
- Hadoop Common
Difference between RDBMS and Hadoop
The table below shows the difference between RDBMS and Hadoop.
| RDBMS | Hadoop |
|---|---|
| Processing in RDBMS can be done through querying using SQL. | MapReduce or Spark is used for batch processing |
| RDBMS is a great option for the OLTP environment. | Hadoop is suitable for BIG data environment. |
| Transformed and aggregated data can be stored in RDBMS. | It has the ability to store a large amount of data. |
| It is costly and depends upon the license of the software. | It is an open-source software and is available for free. |
| Data is stored in a database which is based on rows and columns. Data can be easily retrieved and manipulated in RDBMS. | Hadoop is an open-source software which can be used for running applications and storing data. |
| RDBMS is used to process structured data only. | Hadoop can be used for the processing of unstructured and structured data. |
| Data integrity is high. | Data integrity is low. |
| RDBMS is less scalable in comparison to Hadoop. | Hadoop is highly scalable. |
| RDBMS requires data normalization. | Hadoop does not need data normalization. |
| RDBMS has a static type of schema. | Hadoop has a dynamic type of schema. |
Which is better: Hadoop or RDBMS?
Hadoop is an open-source software and is available for free. It has the ability to process unstructured and structured data. Processing of data is done by using MapReduce or Spark. RDBMS is a costly software and users have to purchase a license to use it. Data is stored in tables that consist of rows and columns. Hadoop can process a large amount of data in comparison to RDBMS.
Conclusion
Hadoop and RDBMS are used for data storage and retrieval. RDBMS can be used by purchasing its license while Hadoop is available for free. Hadoop can process a lot of data in comparison to RDBMS.
FAQs on RDBMS and Hadoop
1. What is the full form of RDBMS and what is it used for?
The full form of RDBMS is Relational Database Management System. A database is an entity in which data is stored in the form of tables. Users can use SQL to store and retrieve data in different tables. A database can have as many tables as possible.
2. What type of relationships can be used in a database?
A database can have different types of relationships which are as follows ?
- One-to-one relationship
- One-to-many relationship
- Many-to-many relationship
3. What are the features of a RDBMS?
RDBMS has many features which are listed below ?
- Data is structured and interrelated
- Many users can connect to a single database
- RDBMS has ACID support which means atomicity, consistency, isolation, and durability.
4. What is secure HDFS and what is its importance?
Secure HDFS is a component of Hadoop. As Hadoop runs in a non-secure mode, Hadoop Secure Mode is required for authentication of each user so that Hadoop services can be used securely.
5. What is the cost of Hadoop?
Hadoop is an open-source software and is available for free. Users can use it anytime and anywhere and can also make changes if required.
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