NoSQL databases in AWS !!

NoSQL database is referred to Non Relational database. It is an approach to design a database that enables storage and query outside relational database systems.

The Key feature of NoSQL databases are:

1. No requirement of fixed pre-defined schema.

2. No structure of table with rows and columns.

3. Very good fit for use cases like Mobile, Web app, Gaming platform which require large data volume and low latency

Different Data models of NoSQL database

1. Key — Value store: This is simplest form of NoSQL database where data is stored in key and values. Example : Amazon Dynamo DB

2. Document DB — The data is stored in form of documents (JSON, XML etc). Example: Amazon Document DB, Mongo DB

3. Graph DB — The data is stored in graph database and relationship built in nodes. Example : Amazon Neptune, Neo4j

4. In Memory DB — Eliminating time to access disc. Example : Amazon Elastic Cache, Memcached, Redis

5. Search Service — Good for search contents, Text search. Example: Amazon Opensearch

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