An instance can contain multiple user-created databases. If you are new to AWS services, use the following resources to learn more:Īn Amazon DocumentDB instance is an isolated database environment in the cloud. The automated backups, snapshots, and replicas in the same cluster are also encrypted. On a database cluster running with Amazon DocumentDB encryption, data stored at rest in the underlying storage is encrypted. With Amazon DocumentDB, you can encrypt your databases using keys that you create and control through AWS Key Management Service (AWS KMS). Amazon DocumentDB backups are automatic, incremental, and continuous, and they have no impact on your cluster performance. Automated backups are stored in Amazon Simple Storage Service (Amazon S3), which is designed for 99.999999999% durability. You can configure your automatic backup retention period up to 35 days. This feature allows you to restore your cluster to any second during your retention period, up to the last 5 minutes. The backup capability in Amazon DocumentDB enables point-in-time recovery for your cluster. Replicas have been provisioned and a failure occurs, Amazon DocumentDB tries to create a new Amazon DocumentDB instance automatically. On instance failure, Amazon DocumentDB automates failover to one of up to 15 Amazon DocumentDB replicas that you create in other Availability Zones. Amazon DocumentDB also isolates the database cache from the database process, enabling the cache to survive an instance restart. Amazon DocumentDB doesn't require a crash recovery replay of database redo logs, which greatly reduces restart times. On an instance failure, Amazon DocumentDB automatically restarts the instance and associated processes. You can also configure firewall settings to control network access to your cluster.Īmazon DocumentDB continuously monitors the health of your cluster. Compute scaling operations typically complete in a few minutes.Īmazon DocumentDB runs in Amazon Virtual Private Cloud (Amazon VPC), so you can isolate your database in your own virtual network. Amazon DocumentDB also provides a reader endpoint, so the application can connect without having to track replicas as they are added and removed.Īmazon DocumentDB lets you scale the compute and memory resources for each of your instances up or down. You can add replicas in minutes regardless of the storage volume size. This capability frees up more processing power to serve read requests and reduces the replica lag time-often down to single digit milliseconds. Amazon DocumentDB replicas share the same underlying storage, lowering costs and avoiding the need to perform writes at the replica nodes. With Amazon DocumentDB, you can increase read throughput to support high-volume application requests by creating up to 15 replica instances. You don't need to provision any excess storage for your cluster to handle future growth. Your storage volume grows in increments of 10 GB, up to a maximum of 64 TB. Amazon DocumentDB automatically grows the size of your storage volume as your database storage needs grow.
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