什么是Amazon DynamoDB？（英文版）

Amazon DynamoDB - A managed NoSQL database

• You provision the throughput you want. You dial up the read and write performance you want to pay for.
• Supports fast, predictable performance.
• Fully distributed and fault tolerant. It exists in multiple Availability Zones.
• It’s a key-value store. JSON is supported.
• Documents up to 400KB in size are supported.