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Amazon DynamoDB is a fully managed proprietary NoSQL database offered by Amazon.com as part of the Amazon Web Services portfolio. DynamoDB offers a fast persistent Key-Value Datastore with built-in support for replication, autoscaling, encryption at rest, and on-demand backup among other features. DynamoDB vs MongoDB: MongoDB supports up to 64 mutable indexes per collection, allowing the document's structure to change dynamically. DynamoDB supports up to 20 mutable global indexes per table, which are not compatible with underlying data, and up to 5 local indexes which cannot be modified after table creation.
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