Container Blob Storage

Azure Blob Storage provides a flat, internet-friendly namespace for managing files in the cloud. It’s the go-to solution for scalable object storage, offering robust security, tiered pricing, and rich data management features.

Architecture and Namespace

Within an Azure Storage account, you organize data into containers—each holding an unlimited number of blobs (files). This flat namespace means:

Containers cannot be nested, ensuring concise URLs (e.g., https://<account>.blob.core.windows.net/<container>/<blob>).
Each blob can be up to 4 TB in size.
You can create as many containers as needed.

Blob Types and Use Cases

Azure supports three blob types to optimize for different scenarios:

Blob Type	Description	Common Use Case
Block blobs	Efficient for uploading/downloading large files in blocks.	Images, videos, documents
Page blobs	Random read/write on fixed-size pages (512 B pages).	Virtual machine disks
Append blobs	Optimized for append-only operations; ideal for continuous logs.	Telemetry logging, audit trails

Access Tiers in Standard Storage Accounts

Optimize costs by selecting the right access tier:

Tier	Storage Cost	Read/Write Cost	Best For
Hot	Higher	Lower	Frequently accessed
Cool	Lower	Higher	Infrequently accessed

Archive Tier

For long-term retention of rarely accessed data:

Archive: Lowest storage cost, highest retrieval latency (up to 15 hours) and cost.

Storage Account Options at a Glance

Choose from these account types and tiers:

Premium: Low-latency, high-throughput workloads.
Standard Hot: Frequently accessed data.
Standard Cool: Infrequently accessed data.
Archive: Long-term storage for rarely accessed files.

Pricing and Retention Policies

Billing factors include:

Data stored (GB/month)
Data operations (ingress/egress)

Standard cool and archive tiers have minimum retention periods:

Tier	Minimum Retention
Cool	30 days
Archive	180 days

Early deletion in cool or archive tiers incurs an early deletion fee for any data removed before the minimum retention period.

Automating Data Lifecycle with Policies

Use Azure Blob Lifecycle Management to transition blobs between tiers or delete stale data automatically based on rules (e.g., age, last modified).

{
  "rules": [
    {
      "name": "move-to-cool",
      "type": "Lifecycle",
      "enabled": true,
      "definition": {
        "filters": { "blobTypes": ["blockBlob"] },
        "actions": {
          "baseBlob": { "tierToCool": { "daysAfterModificationGreaterThan": 30 } }
        }
      }
    }
  ]
}

Change Tracking with Blob Change Feed

Enable Blob Change Feed to record every change (create, update, delete) in a durable, replayable log. This supports:

Point-in-time restores
Auditing and compliance
Data synchronization across accounts

Introduction

File-Based Storage

Structured Data

Semi-Structured Data

Cosmos DB

Analyzing Data

Container Blob Storage

Architecture and Namespace

Blob Types and Use Cases

Access Tiers in Standard Storage Accounts

Archive Tier

Storage Account Options at a Glance

Pricing and Retention Policies

Automating Data Lifecycle with Policies

Change Tracking with Blob Change Feed

Links and References

Watch Video

​Architecture and Namespace

​Blob Types and Use Cases

​Access Tiers in Standard Storage Accounts

​Archive Tier

​Storage Account Options at a Glance

​Pricing and Retention Policies

​Automating Data Lifecycle with Policies

​Change Tracking with Blob Change Feed

​Links and References

Watch Video

Architecture and Namespace

Blob Types and Use Cases

Access Tiers in Standard Storage Accounts

Archive Tier

Storage Account Options at a Glance

Pricing and Retention Policies

Automating Data Lifecycle with Policies

Change Tracking with Blob Change Feed

Links and References