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Cloud Computing · Intermediate

Blob Access Tiers

Azure Blob Storage tiers (Hot, Cool, Cold and Archive) that trade storage cost against access cost and latency.

Definition

Hot is for frequently accessed data; Cool has a 30-day minimum; Cold has a 90-day minimum; Archive is offline with a 180-day minimum and requires rehydration, which can take up to 15 hours at standard priority. Lifecycle management policies move blobs between tiers automatically.

Example

A lifecycle rule moves blobs to Cool after 30 days without modification and to Archive after 180 days.

Exam tip

Archive blobs cannot be read until rehydrated; early deletion fees apply before minimum durations.

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