DynamoDB提供两种形式的备份，一种是on-demand，另一种是PITR（point-in-time-recovery）。
Amazon DynamoDB offers two types of backup, on-demand and point-in-time recovery (PITR). PITR is on a rolling window, on-demand backups stay around forever (even after the table is deleted) until someone tells DynamoDB to delete the backups. When you enable PITR, DynamoDB backs up your table data automatically with per-second granularity. The retention period is a fixed 35 days (5 calendar weeks) and can’t be modified. However, large enterprise customers who are used to deploying tradition backup solutions in their data centers often want a centralized backup solution that can schedule backups through “jobs” and handle tasks such as expiring/deleting older backups time, monitoring the status of on-going backups, verifying compliance, and finding / restoring backups, all using a central console. At the same time they don’t want to manually manage their backups, create their own tools via scripts or AWS Lambda functions, or use a different solution for each application they have to protect. They want the ability to have a standardized way to manage their backups at scale to the resources in their AWS account.
AWS Backup aims to be the single point of centralize backup management and source of truth that customers can rely on. You can schedule periodic or future backups by using AWS Backup, The backup plans include schedules and retention policies for your resources. AWS Backup creates the backups and deletes prior backups based on your retention schedule. Backups of resources are always required in case of disaster recovery.
AWS Backup removes the undifferentiated heavy lifting of manually making and deleting On-demand backups by automating the schedule and deletion for you. In this lab we will be exploring how to schedule periodic backups of a DynamoDB table using AWS Backup. I am going to create a backup plan where I take daily backup and keep it for a month. Next I setup a backup rule to transition the backup to cold storage after 31 days and auto-delete the backup after 366 days from backup creation date.
Also, I show you how you can restrict people in your organization to delete the backups from AWS backup and DynamoDB console while able to do others operations like create backup, create table etc.
Now lets dive into the different DynamoDB backup options.