AWS Databases
- For Relational Databases we have fully managed RDS
- For other Database Categories we have following services
- Databases
- NOSQL => Dynamo DB
- Mongo DB => Document DB
- Cassandra => KeySpaces
- Memcahced => Elastic Cache
- Redis => Elastic Cache
- Graph => Neptue
- Block Chain => QLDB
- Time Series Databases => TimeStream
- Non-Relational Databases:
- Categories:
- Key/Value Stores
- Document Oriented Stores
- Graph Databases
- Categories:
DynamoDB
- This is NoSQL Database
- This is a managed non relational database that can handle thousands of reads and writes per second.
- It acheives this performance by spreading data into multiple partitions.
- A Partition is allocation of storage for table & its backed by SSD drives in Multiple AZs
- Partition and Hash Keys:
- Here we create table and we must specify a primary key and a data type.
- A Partition key (hash key) is a primary key that contains a single value
- Attributes and Items:
- Each key/value pair composes of an attribute and one or more attributes make up an item.
- Create a dynamo db table
- Data is written into Dynamo db from applications i.e. code Refer Here
- Performing Operations Refer Here
- Connecting to table Refer Here
- Backups:
- Replicas:
- Secondary Indexes solves issues with querying the dynamo db with items other than primary/partition key. When we create secondary index choose set of attributes which are called as projected attributes
- Aws Dynamo DB Accelarator (DAX) is fully managed highly available in memory cache for Dynamo Db that delivers upto 10 times performance improvement
- Review the costs by price estimates
