[AWS Certificate]-DynamoDB Backup & Restore

Backup and Restore in Dynamo DB

 

• Automatically encrypted, cataloged and easily discoverable
• Highly Scalable - create or retain as many backups for tables of any size
• Backup operations complete in seconds
• Backup are consistent within seconds across thusands of partitions
• No provisioned capacity consumption
• Does not affect table performance or availability
• Backups are preserved regardless of table deletion

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Backup and Restore in DynamoDB

 

• Can backup within the same AWS region as the table
• Restores can be within same region or cross region
• Integrated with AWS Backup Service (can create periodic backup plans)
• Periodic backups can be scheduled using Lambda and CloudWatch triggers
• Cannot overwrite an existing table during restore, restores can be done only to a new table (=new name)
• To retain the original table name, delete the existing table before running restore
• You can use IAM policies for access control

 

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Backup and Restore in DynamoDB

• Restored table gets the same provisioned RCUs/WCUs as the source table, as recorded at the time of backup
• PITR RPO = 5 minutes approx
• PITR RTO can be longer as restore operation creates a new table

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Backup and Restore in DynamoDB

 

• What gets restored:
  • Table data
  • GSIs and LSIs (optional, you can choose)
  • Encryption settings (you can change)
  • Provisioned RCUs / WCUs (with values at the time when backup was created)
  • Billing mode (with value at the time when backup was created)
• What you must manually set up on the restored table:
  • Auto scaling policies, IAM policies
  • CloudWatch metrics and alarms
  • Stream and TTL settings
  • Tags

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Demo

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Continuous Backups with PITR

 

• Restore table data to any second in the last 35 days!
• Priced per GB based on the table size
• If you disable PITR and re-enable it, the 35 days clock gets reset
• Works with unencrypted, encrypted tables as well as global tables
• Can be enabled on each local replica of a global table

 

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Demo

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Continuous Backups with PITR

 

• If you restore a table which is part of global tables, the restored table will be an independent table (won't be a global table anymore!)
• Always restores d ata to a new table
• What cannot be restored
  • Stream settings
  • TTL options
  • Autoscaling config
  • PITR settings
  • Alarms and tags
• All PITR API calls get logged in CloudTrail

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Demo

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