Question

What is the difference between Mongodb and Hadoop

Answer 1

MongoDB is a NoSQL database, whereas Hadoop is a framework for storing & processing Big Data in a distributed environment. 

MongoDB

MongoDB is a document oriented NoSQL database. MongoDB stores data in flexible JSON like document format. The fields can vary from document to document, and it gives you the flexibility to change the schema any time. MongoDB is a distributed database, so it provides high availability & horizontal scalability. You can perform real-time aggregations & ad-hoc querying. You can easily map the documents to your applications. 

To know more go through this blog:

https://www.edureka.co/blog/mongodb-the-database-for-big-data-processing/

Hadoop

Hadoop is a collection of software which is used to store & process big data. 

Core components of Hadoop are HDFS & YARN. 

HDFS (Hadoop Distributed File System) is the storage part of Hadoop. HDFS file system stores data in a distributed environment, so that data can be processed in a parallel manner. YARN (Yet Another Resource Negotiator) is the resource manager in Hadoop. YARN is the one which allocates resources to various job which are getting submitted to Hadoop. 

On top of YARN, you have multiple tools which can be used to process data. You can either write Mapreduce programs or execute Pig or Hive queries. HBase is again a column oriented NoSQL database which runs on top of Hadoop.  

I would recommend you to go through these Hadoop Tutorial & hadoop ecosystem blog:

https://www.edureka.co/blog/hadoop-tutorial

https://www.edureka.co/blog/hadoop-ecosystem

You can even check out the details of Big Data with the Azure Data Engineer Course.

Hope this will help!

To know more about it, get your Mongodb certification today.

Thanks.

Answer 2

MongoDB is just a Database whereas hadoop is a collection of different tools known as Hadoop Eco-system.

Answer 3

From a Data-storage perspective, mongodb stores data in collections whereas hadoop stores data in a different file system called HDFS.

Answer 4

MongoDB is a database used to provide greate performance for DBMS. Hadoop is used to handle Big Data and is not an optimal choice for Small data

Answer 5

Hadoop can store any format of data. Be it structured or unstructured. But in case of MongoDB, it supports limited data formats (Json or csv)

Answer 6

MongoDB is just a single Database but Hadoop is a set of Tools. MongoDB is cheap compared to Hadoop setup.

Answer 7

MongoDB is good for memory handling but it lacks optimization whereas Hadoop can optimize space and utilize it.

Answer 8

Hadoop is used to deal with data when the data is being used for analytics purpose. MongoDB is used for real-time data processing/usage

Answer 9

Hadoop is used for Big Data. So, the processing is time is more (mins or maybe hours) but in MongoDB, processing time is in milliseconds so it is more suitable for real-time applications

Answer 10

Apart from the similarity that they are both used to manage data, they are very different. Hadoop is a framework and MongoDB is a NoSql database