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Copy file name to clipboardExpand all lines: articles/storage/blobs/monitor-blob-storage.md
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[!INCLUDE [Blob Storage feature support in Azure Storage accounts](../../../includes/azure-storage-feature-support.md)]
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## FAQ
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## Frequently asked questions (FAQ)
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**Does Azure Storage support metrics for Managed Disks or Unmanaged Disks?**
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No. Azure Compute supports the metrics on disks. For more information, see [Per disk metrics for Managed and Unmanaged Disks](https://azure.microsoft.com/blog/per-disk-metrics-managed-disks/).
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**What does a dashed line in an Azure Metric chart indicate?**
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Some Azure metrics charts, such as the ones that display availability and latency data, use a dashed line to indicate that there's a missing value (also known as null value) between two known time grain data points. For example, if in the time selector you picked `1 minute` time granularity, but the metric was reported at 07:26, 07:27, 07:29, and 07:30, then a dashed line connects 07:27 and 07:29 because there's a minute gap between those two data points. A solid line connects all other data points. The dashed line drops down to zero when the metric uses count and sum aggregation. For the avg, min or max aggregations, a dashed line connects the two nearest known data points. Also, when the data is missing on the rightmost or leftmost side of the chart, the dashed line expands to the direction of the missing data point.
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**How do I track availability of my storage account?**
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You can configure a resource health alert based on the [Azure Resource Health](../../service-health/resource-health-overview.md) service to track the availability of your storage account. If there are no transactions on the account, then the alert reports based on the health of the Storage cluster where your storage account is located.
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See [Metrics and Logs FAQ](storage-blob-faq.yml#metrics-and-logs).
Copy file name to clipboardExpand all lines: articles/storage/blobs/storage-blob-change-feed.md
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- Storage account failover of geo-redundant storage accounts with the change feed enabled may result in inconsistencies between the change feed logs and the blob data and/or metadata. For more information about such inconsistencies, see [Change feed and blob data inconsistencies](../common/storage-disaster-recovery-guidance.md#change-feed-and-blob-data-inconsistencies).
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- You might see 404 (Not Found) and 412 (Precondition Failed) errors reported on the **$blobchangefeed** and **$blobchangefeedsys** containers. You can safely ignore these errors.
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## Feature support
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[!INCLUDE [Blob Storage feature support in Azure Storage accounts](../../../includes/azure-storage-feature-support.md)]
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## FAQ
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## Frequently asked questions (FAQ)
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### What is the difference between the changefeed and Storage Analytics logging?
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See [Change feed support FAQ](storage-blob-faq.yml#change-feed-support).
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Analytics logs have records of all read, write, list, and delete operations with successful and failed requests across all operations. Analytics logs are best-effort and no ordering is guaranteed.
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The change feed is a solution that provides transactional log of successful mutations or changes to your account such as blob creation, modification, and deletions. The change feed guarantees all events to be recorded and displayed in the order of successful changes per blob, thus you do not have to filter out noise from a huge volume of read operations or failed requests. The change feed is fundamentally designed and optimized for application development that require certain guarantees.
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### Should I use the change feed or Storage events?
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## Feature support
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You can leverage both features as the change feed and [Blob storage events](storage-blob-event-overview.md) provide the same information with the same delivery reliability guarantee, with the main difference being the latency, ordering, and storage of event records. The change feed publishes records to the log within few minutes of the change and also guarantees the order of change operations per blob. Storage events are pushed in real time and might not be ordered. Change feed events are durably stored inside your storage account as read-only stable logs with your own defined retention, while storage events are transient to be consumed by the event handler unless you explicitly store them. With change feed, any number of your applications can consume the logs at their own convenience using blob APIs or SDKs.
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[!INCLUDE [Blob Storage feature support in Azure Storage accounts](../../../includes/azure-storage-feature-support.md)]
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## Next steps
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- See an example of how to read the change feed by using a .NET client application. See [Process change feed logs in Azure Blob Storage](storage-blob-change-feed-how-to.md).
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- Learn about how to react to events in real time. See [Reacting to Blob Storage events](storage-blob-event-overview.md)
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- Learn more about detailed logging information for both successful and failed operations for all requests. See [Azure Storage analytics logging](../common/storage-analytics-logging.md)
Copy file name to clipboardExpand all lines: articles/storage/blobs/storage-blob-faq.yml
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When will this change take effect?
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This change will start gradual rollout starting September 1, 2023.
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- name: Metrics and Logs
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questions:
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- question: |
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Does Azure Storage support metrics for Managed Disks or Unmanaged Disks?
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answer: |
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No. Azure Compute supports the metrics on disks. For more information, see [Per disk metrics for Managed and Unmanaged Disks](https://azure.microsoft.com/blog/per-disk-metrics-managed-disks/).
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- question: |
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What does a dashed line in an Azure Metric chart indicate?
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answer: |
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Some Azure metrics charts, such as the ones that display availability and latency data, use a dashed line to indicate that there's a missing value (also known as null value) between two known time grain data points. For example, if in the time selector you picked `1 minute` time granularity, but the metric was reported at 07:26, 07:27, 07:29, and 07:30, then a dashed line connects 07:27 and 07:29 because there's a minute gap between those two data points. A solid line connects all other data points. The dashed line drops down to zero when the metric uses count and sum aggregation. For the avg, min or max aggregations, a dashed line connects the two nearest known data points. Also, when the data is missing on the rightmost or leftmost side of the chart, the dashed line expands to the direction of the missing data point.
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- question: |
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How do I track availability of my storage account?
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answer: |
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You can configure a resource health alert based on the [Azure Resource Health](../../service-health/resource-health-overview.md) service to track the availability of your storage account. If there are no transactions on the account, then the alert reports based on the health of the Storage cluster where your storage account is located.
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- name: Change feed support
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questions:
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- question: |
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What is the difference between the change feed and Storage Analytics logging?
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answer: |
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Analytics logs have records of all read, write, list, and delete operations with successful and failed requests across all operations. Analytics logs are best-effort and no ordering is guaranteed.
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The change feed is a solution that provides transactional log of successful mutations or changes to your account such as blob creation, modification, and deletions. The change feed guarantees all events to be recorded and displayed in the order of successful changes per blob, thus you do not have to filter out noise from a huge volume of read operations or failed requests. The change feed is fundamentally designed and optimized for application development that require certain guarantees.
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- question: |
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Should I use the change feed or Storage events?
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answer: |
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You can leverage both features as the change feed and [Blob storage events](storage-blob-event-overview.md) provide the same information with the same delivery reliability guarantee, with the main difference being the latency, ordering, and storage of event records. The change feed publishes records to the log within few minutes of the change and also guarantees the order of change operations per blob. Storage events are pushed in real time and might not be ordered. Change feed events are durably stored inside your storage account as read-only stable logs with your own defined retention, while storage events are transient to be consumed by the event handler unless you explicitly store them. With change feed, any number of your applications can consume the logs at their own convenience using blob APIs or SDKs.
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- name: Static website hosting
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questions:
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Does the Azure Storage firewall work with a static website?
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Yes. Storage account [network security rules](../common/storage-network-security.md), including IP-based and VNET firewalls, are supported for the static website endpoint, and may be used to protect your website.
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Do static websites support Azure Active Directory (Azure AD)?
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answer: |
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No. A static website only supports anonymous public read access for files in the **$web** container.
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How do I use a custom domain with a static website?
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You can configure a [custom domain](./static-website-content-delivery-network.md) with a static website by using [Azure Content Delivery Network (Azure CDN)](./storage-custom-domain-name.md#map-a-custom-domain-with-https-enabled). Azure CDN provides consistent low latencies to your website from anywhere in the world.
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How do I use a custom Secure Sockets Layer (SSL) certificate with a static website?
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You can configure a [custom SSL](./static-website-content-delivery-network.md) certificate with a static website by using [Azure CDN](./storage-custom-domain-name.md#map-a-custom-domain-with-https-enabled). Azure CDN provides consistent low latencies to your website from anywhere in the world.
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- question: |
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How do I add custom headers and rules with a static website?
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answer: |
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You can configure the host header for a static website by using [Azure CDN - Verizon Premium](../../cdn/cdn-verizon-premium-rules-engine.md). We'd be interested to hear your feedback [here](https://feedback.azure.com/d365community/idea/694b08ef-3525-ec11-b6e6-000d3a4f0f84).
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- question: |
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Why am I getting an HTTP 404 error from a static website?
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answer: |
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A 404 error can happen if you refer to a file name by using an incorrect case. For example: `Index.html` instead of `index.html`. File names and extensions in the url of a static website are case-sensitive even though they're served over HTTP. This can also happen if your Azure CDN endpoint isn't yet provisioned. Wait up to 90 minutes after you provision a new Azure CDN for the propagation to complete.
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Why isn't the root directory of the website not redirecting to the default index page?
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In the Azure portal, open the static website configuration page of your account and locate the name and extension that is set in the **Index document name** field. Ensure that this name is exactly the same as the name of the file located in the **$web** container of the storage account. File names and extensions in the url of a static website are case-sensitive even though they're served over HTTP.
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- name: Blob index tags
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questions:
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Can blob index help me filter and query content inside my blobs?
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No, if you need to search within your blob data, use query acceleration or Azure search.
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Are there any requirements on index tag values?
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Blob index tags only support string data types and querying returns results with lexicographical ordering. For numbers, zero pad the number. For dates and times, store as an ISO 8601 compliant format.
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- question: |
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Are blob index tags and Azure Resource Manager tags related?
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No, Resource Manager tags help organize control plane resources such as subscriptions, resource groups, and storage accounts. Index tags provide blob management and discovery on the data plane.
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- name: Managing costs
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questions:
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If I use Azure Storage for only a few days a month, is the cost prorated?
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Storage capacity is billed in units of the average daily amount of data stored, in gigabytes (GB), over a monthly period. For example, if you consistently used 10 GB of storage for the first half of the month, and none for the second half of the month, you would be billed for your average usage of 5 GB of storage.
Copy file name to clipboardExpand all lines: articles/storage/blobs/storage-blob-static-website.md
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[!INCLUDE [Blob Storage feature support in Azure Storage accounts](../../../includes/azure-storage-feature-support.md)]
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## FAQ
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## Frequently asked questions (FAQ)
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##### Does the Azure Storage firewall work with a static website?
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Yes. Storage account [network security rules](../common/storage-network-security.md), including IP-based and VNET firewalls, are supported for the static website endpoint, and may be used to protect your website.
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##### Do static websites support Azure Active Directory (Azure AD)?
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No. A static website only supports anonymous public read access for files in the **$web** container.
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##### How do I use a custom domain with a static website?
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You can configure a [custom domain](./static-website-content-delivery-network.md) with a static website by using [Azure Content Delivery Network (Azure CDN)](./storage-custom-domain-name.md#map-a-custom-domain-with-https-enabled). Azure CDN provides consistent low latencies to your website from anywhere in the world.
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##### How do I use a custom Secure Sockets Layer (SSL) certificate with a static website?
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You can configure a [custom SSL](./static-website-content-delivery-network.md) certificate with a static website by using [Azure CDN](./storage-custom-domain-name.md#map-a-custom-domain-with-https-enabled). Azure CDN provides consistent low latencies to your website from anywhere in the world.
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##### How do I add custom headers and rules with a static website?
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You can configure the host header for a static website by using [Azure CDN - Verizon Premium](../../cdn/cdn-verizon-premium-rules-engine.md). We'd be interested to hear your feedback [here](https://feedback.azure.com/d365community/idea/694b08ef-3525-ec11-b6e6-000d3a4f0f84).
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##### Why am I getting an HTTP 404 error from a static website?
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A 404 error can happen if you refer to a file name by using an incorrect case. For example: `Index.html` instead of `index.html`. File names and extensions in the url of a static website are case-sensitive even though they're served over HTTP. This can also happen if your Azure CDN endpoint isn't yet provisioned. Wait up to 90 minutes after you provision a new Azure CDN for the propagation to complete.
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##### Why isn't the root directory of the website not redirecting to the default index page?
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In the Azure portal, open the static website configuration page of your account and locate the name and extension that is set in the **Index document name** field. Ensure that this name is exactly the same as the name of the file located in the **$web** container of the storage account. File names and extensions in the url of a static website are case-sensitive even though they're served over HTTP.
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See [Static website hosting FAQ](storage-blob-faq.yml#static-website-hosting).
Copy file name to clipboardExpand all lines: articles/storage/blobs/storage-manage-find-blobs.md
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-`Copy Blob` doesn't copy blob index tags from the source blob to the new destination blob. You can specify the tags you want applied to the destination blob during the copy operation.
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## FAQ
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## Frequently asked questions (FAQ)
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**Can blob index help me filter and query content inside my blobs?**
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No, if you need to search within your blob data, use query acceleration or Azure search.
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**Are there any requirements on index tag values?**
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Blob index tags only support string data types and querying returns results with lexicographical ordering. For numbers, zero pad the number. For dates and times, store as an ISO 8601 compliant format.
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**Are blob index tags and Azure Resource Manager tags related?**
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No, Resource Manager tags help organize control plane resources such as subscriptions, resource groups, and storage accounts. Index tags provide blob management and discovery on the data plane.
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See [Blob index tags FAQ](storage-blob-faq.yml#blob-index-tags).
Copy file name to clipboardExpand all lines: articles/storage/common/storage-plan-manage-costs.md
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| Monitoring | Enabling Storage Analytics logs (classic logs)| Storage analytics logs can accumulate in your account over time if the retention policy is not set. Make sure to set the retention policy to avoid log buildup which can lead to unexpected capacity charges.<br><br>For more information, see [Modify log data retention period](manage-storage-analytics-logs.md#modify-log-data-retention-period)|
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| Protocols | Enabling SSH File Transfer Protocol (SFTP) support| Enabling the SFTP endpoint incurs an hourly cost. To avoid passive charges, consider enabling SFTP only when you are actively using it to transfer data.<br><br> For guidance about how to enable and then disable SFTP support, see [Connect to Azure Blob Storage by using the SSH File Transfer Protocol (SFTP)](../blobs/secure-file-transfer-protocol-support-how-to.md). |
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## FAQ
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## Frequently asked questions (FAQ)
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**If I use Azure Storage for only a few days a month, is the cost prorated?**
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Storage capacity is billed in units of the average daily amount of data stored, in gigabytes (GB), over a monthly period. For example, if you consistently used 10 GB of storage for the first half of the month, and none for the second half of the month, you would be billed for your average usage of 5 GB of storage.
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See [Managing costs FAQ](storage-blob-faq.yml#managing-costs).
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