AWS Classroom Series – 06/Nov/2021

AWS ElasticCache

• AWS Elasticcache is web service that makes it easy to deploy, operate and scale an in-memory cache in the cloud.
• AWS ElasticCache manages the work involved in setting up an in-memory service, from provisiong the AWS resources you request to install the software.
• Using ElasticCache, you can add in-memory caching layer to your application in a matter of minutes with few API Calls.
• AWS Elastic Cache integrates with other AWS services such as EC2 and RDS.
• The in-memory caching providing Elastic Cache imporves application performance by storing critical peices of data in memory for faster access.
• AWS ElasticCache currently supports two different in-memory key value engines
  • Memcached:
    • This is widely adopted in-memory key store.
  • Redis:
    • This is an increasingly popular opensource key-value store that supports multiple advanced datastructures like sorted set, hashes and lists.
    • Unlike memcached, Redis has disk persitense built in, meaning you can use it for long lived data.
    • Redis also supports replication, which can be achieved multi-AZ Redundany
  • Architecture of applications in AWS using Elastic Cache
  • Creation:

AWS CLI for Managing Databases

• AWS interaction types
• Refer Here for image based demonstration to create access key and secret key
• Configure CLI
• AWS CLI Commands:
  • Syntax: aws <service> <action/command> [<parameters>]
• AWS RDS CLI Refer Here
  • Syntax of rds cli commands aws rds <action/command> [<parameters>]
  • Refer Here for all the available commands for AWS RDS CLI
  • Generally in AWS all the query resources will have commands which will have describe-* kind of naming
  • Lets be specific about describe-db-instances the command for it would be aws rds describe-db-instances [<parameters>]
  • Refer Here for the describe-db-instances command syntax
  • Lets run the following command
  • The output of the command is documented Refer Here
  • Write an AWS CLI command to query all the db subnet groups
    • Refer Here for documentation
  • Exercise: Write AWS CLI command to query all option groups & parameter groups.