What are the Limits of Azure Storage?

As businesses increasingly rely on cloud storage solutions to store and manage their data, it’s essential to understand the limits of the storage options available to them. One popular cloud storage platform is Azure Storage, which offers a range of storage options including Blob storage, Queue storage, Table storage, and Virtual Machine disk storage. Understanding the limits of these storage options is key to ensuring the performance and stability of your data storage, and avoiding potential issues that can arise from exceeding these limits.

This comprehensive guide will provide an overview of the limits of Azure Storage, including Azure Blob storage limits, Azure Queue storage limits, Azure Table storage limits, and Virtual machine disk limits. Whether you’re a new or experienced user of Azure Storage, this guide will provide the information you need to make informed decisions about your data storage. Additionally, this guide will answer frequently asked questions about the limits of Azure Storage, so you can have a clear understanding of the restrictions and limitations of this cloud storage platform.

Types of Azure Storage

Azure Storage offers several types of storage to meet different storage needs:

Blob Storage

Blob storage is optimized for storing unstructured data such as text and binary data, including images, videos, and audio files. Blob storage can be accessed via HTTP or HTTPS.

File Storage

File storage offers a fully managed file share in the cloud, enabling organizations to migrate their applications that require file system semantics to Azure. File storage supports the Server Message Block (SMB) protocol, making it easy to mount file shares from Windows and Linux-based virtual machines.

Queue Storage

Queue storage is a messaging service that enables communication between application components. It allows messages to be sent between different application components asynchronously.

Table Storage

Table storage is a NoSQL key-value store that can store large amounts of structured data. It is designed to support low latency and high availability for applications that need to store large amounts of data.

Limits of Azure Storage

While Azure Storage provides many benefits, it also has its limits. Here are some of the common limits of Azure Storage:

Account and Subscription Limits

Each Azure Storage account and subscription has a set of limits that govern the amount of data that can be stored, the number of requests that can be made, and the performance of the storage service.

Performance Limits

Azure Storage imposes performance limits on the amount of data that can be read or written to the storage service. This limit is determined by the size and number of disks attached to the virtual machine that is accessing the storage service.

Capacity Limits

Azure Storage has a limit on the amount of data that can be stored in a single storage account. This limit depends on the type of storage account and the redundancy options selected.

Scalability Limits

Azure Storage is designed to scale horizontally, allowing you to add additional storage resources as your data grows. However, there are limits to how much you can scale, and adding more storage resources may not always result in better performance.


azure storage limits

Azure Storage Limits Overview

In order to ensure the performance and stability of Azure Storage, Microsoft has set certain limits on various aspects of storage, such as the number of requests per second, the size of data, and the number of operations per second. These limits are subject to change, and Microsoft may increase or decrease them based on the current usage and demand.

Azure Blob storage limits

Azure Blob storage is a highly scalable and cost-effective option for storing unstructured data, such as images, videos, audio, and documents. However, it’s important to be aware of the following limits when using Blob storage:

  • Maximum Blob size: The maximum size for a single Blob in Azure Blob storage is 4 TB.
  • Maximum number of Blobs per container: There is no hard limit to the number of Blobs that can be stored in a container, but there are performance implications for storing large numbers of Blobs in a single container.
  • Maximum number of containers per storage account: A single storage account can contain up to 500 Tb of data, spread across an unlimited number of containers.

Azure Queue storage limits

Azure Queue storage is a scalable and reliable option for storing large amounts of messages that can be read and processed by multiple applications. However, it’s important to be aware of the following limits when using Queue storage:

  • Maximum size of a message: A single message in a queue can be up to 64 KB in size.
  • Maximum number of messages in a queue: There is no hard limit to the number of messages that can be stored in a queue, but there are performance implications for storing large numbers of messages.
  • Maximum number of queues per storage account: A single storage account can contain an unlimited number of queues.

Azure Table storage limits

Azure Table storage is a scalable and flexible option for storing structured NoSQL data. However, it’s important to be aware of the following limits when using Table storage:

  • Maximum size of an entity: An individual entity in a table can be up to 1 MB in size.
  • Maximum number of entities per table: There is no hard limit to the number of entities that can be stored in a table, but there are performance implications for storing large numbers of entities in a single table.
  • Maximum number of tables per storage account: A single storage account can contain an unlimited number of tables.

Virtual machine disk limits

Virtual Machine disk storage is used to store data for virtual machines in Azure. It’s important to be aware of the following limits when using virtual machine disk storage:

  • Maximum disk size: The maximum size of a disk in Azure depends on the disk type, with the maximum size being up to 4 TB for premium SSDs and up to 512 GB for standard disks.
  • Maximum number of disks per virtual machine: The maximum number of disks that can be attached to a virtual machine depends on the virtual machine size, with the maximum number being 64 disks for some of the largest virtual machine sizes.
  • Maximum number of disks per storage account: A single storage account can contain an unlimited number of disks.

Overcoming Azure Storage Limits

To overcome the limits of Azure Storage, here are some best practices to follow:

Monitoring and Alerting

It is essential to monitor your Azure Storage accounts regularly and set up alerts to notify you when you are approaching your storage limits. This will enable you to take corrective action before you reach your storage limits. Use Cloud Storage Manager to see how much Azure Storage you are using. Use the inbuilt reports to see where you can optimise usage and reduce costs.

Optimizing Storage Utilization

You can optimize storage utilization by removing unused data, compressing data, and using appropriate storage tiers for different types of data. Using Cloud Storage Manager, to help reduce storage costs and ensure that your storage resources are being used efficiently.

Scaling Storage Resources

If you need to overcome the scalability limits of Azure Storage, you can scale your storage resources horizontally by adding more storage accounts, using sharding techniques, or using Azure Storage Data Box. By scaling your storage resources, you can accommodate more data and ensure that your storage system can handle the load.

Azure Storage Limits FAQs

Can I increase the limits of Azure Storage?

Yes, in some cases, you can increase the limits of Azure Storage by submitting a request to Microsoft. However, not all limits are adjustable, and the process of increasing limits can take time.

What happens if I exceed the limits of Azure Storage? 

If you exceed the limits of Azure Storage, you may experience reduced performance, timeouts, or errors. To avoid these issues, it’s important to monitor your storage usage and plan accordingly.

Are the limits of Azure Storage different for different regions?

Yes, the limits of Azure Storage may vary between different regions due to differences in infrastructure and available resources. It’s important to check the limits for your specific region in the Azure documentation.

Can I increase the limits of Azure Storage?

Yes, in some cases, you can request an increase in the limits of Azure Storage. However, this may not be possible for all limits and depends on the specific limit and your usage scenario.

Is there a limit to the number of storage accounts I can have in Azure? 

Yes, there is a limit to the number of storage accounts you can have in Azure, and it depends on the Azure subscription and the region you are using. It is recommended to check the Azure documentation for the most up-to-date information on storage account limits.

Can I store data in Azure Storage if I don’t have an Azure subscription? 

No, you need an Azure subscription to store data in Azure Storage.

Are there any restrictions on the type of data I can store in Azure Storage? 

Yes, there are restrictions on the type of data that can be stored in Azure Storage. Azure enforces strict compliance policies and regulations for storing certain types of data, such as personal data and sensitive information.

Can I store files larger than 4 TB in Azure Blob storage? 

No, the maximum size for a single Blob in Azure Blob storage is 4 TB. If you need to store larger files, you may need to use multiple Blobs or consider other storage solutions.

How do I know I am at my Azure Storage Limits?

Use Cloud Storage Manager to scan all your Azure storage and provide you with just how much Azure Storage you are using. You can also run reports like what are my biggest Storage Accounts, How many blobs do I have in each Storage Account, plus loads more reports.

Final Thoughts

In conclusion, understanding the limits of Azure Storage is essential for ensuring the performance and stability of your data storage. By familiarizing yourself with the limits of Azure Blob storage, Queue storage, Table storage, and Virtual Machine disk limits, you can plan your storage usage accordingly and avoid potential issues. Whether you’re a new or experienced user of Azure Storage, this comprehensive guide is an excellent resource for staying ahead of storage limitations.

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