Microsoft Azure Data Fundamentals DP-900 Practice Question
Your company collects meter readings from millions of IoT devices every minute. Each reading contains a DeviceId, a timestamp, and several optional attributes that differ by device model. You must store this data at the lowest possible cost while enabling millisecond retrieval of a single reading when given its DeviceId and timestamp. Which Azure storage service best meets these requirements?
Azure Table storage is a schemaless NoSQL key/value store designed to hold very large volumes of structured, non-relational data at minimal cost. Because every entity is automatically indexed by its PartitionKey and RowKey, storing the DeviceId as the partition key and the timestamp as the row key lets the application locate any single reading in constant time. Azure SQL Database is more expensive and requires a fixed schema, while Azure Blob storage and Azure File shares are optimized for unindexed, stream-based access and cannot provide millisecond point look-ups without additional indexing services.
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Microsoft Azure Data Fundamentals DP-900
Describe considerations for working with non-relational data on Azure
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