Cloud Computing

Amazon Elastic Block Store (EBS), Amazon Elastic File System (EFS): 

 EBS is an easy-to-use, scalable, high-performance block-storage service designed for Amazon Elastic Compute Cloud (Amazon EC2).

• EBS is unformatted block-level storage and mounted as raw device to the EC2 instance 
• EBS volumes persist independently from the life of the EC2 instance 
• EBS volume is automatically replicated within an availability zone. 
• EBS can now enable Multi-Attach on Amazon EBS IOPS io1 volume to allow a single volume to be concurrently attached to up to 16 AWS Nitro System-based EC2 instances within the same AZ

EBS Snapshot: Snapshots are used to backup data incrementally on EBS volumes. Snapshots are copied to Amazon S3.

Data Lifecycle Manager for Snapshots: Amazon DLM supports EBS volumes and snapshots. Define backup and retention schedules for EBS snapshots by creating lifecycle policies based on tags

• It is free to use and no longer need to create custom scripts for backup and restore
• can create up to 100 lifecycle policies per region and add up to 45 tags per resource
• can create one schedule per lifecycle policy

Get Started with EBS:

• Select EBS under Volumes from the EC2 dashboard and Click on Create volume
• Select general purpose SSD and reduce the size to 8 GB, and choose the availability zone the same as the zone of the created EC2 instance
• Click Create volume and click on Actions -->Attach Volume
• Click on the instance field; choose the available instance and proceed to create

EBS volume is now created and is ready to be mounted. Reconnect to EC2 instance and follow Linux/Ubuntu commands to mount the created EBS volume.

What is Amazon Elastic File System (EFS) ?

EFS provides a cloud-based simple, scalable, elastic file system for general purpose workloads for use with AWS Cloud services and on-premises resources.

• It is built to scale on demand to petabytes, growing and shrinking automatically as you add and remove files, eliminating the need to provision and manage capacity to accommodate growth. 
• provides massively parallel shared access to thousands of Amazon EC2 instances, enabling your applications to achieve high levels of throughput and IOPS with consistent low latencies.
• Amazon EFS is a fully managed service.

Get Started with EFS:

• Go to AWS Management Console and select Services drop down to choose EFS
• Choose Create File System
• select the default VPC, name file system, add tags if needed and click on Next
• Select General Purpose and Bursting for high performance
• Review the properties and Create File System. Note down the File System ID

EFS volume is now created and is ready to be mounted. Reconnect to EC2 instance and follow Linux/Ubuntu commands to mount the created EFS volume.