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Copy file name to clipboardExpand all lines: articles/storage/blobs/storage-blobs-introduction.md
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A number of solutions exist for migrating existing data to Blob storage:
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-**AzCopy** is an easy-to-use command-line tool for Windows and Linux that copies data to and from Blob storage, across containers, or across storage accounts. For more information about AzCopy, see [Transfer data with the AzCopy v10 (Preview)](../common/storage-use-azcopy-v10.md).
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-**AzCopy** is an easy-to-use command-line tool for Windows and Linux that copies data to and from Blob storage, across containers, or across storage accounts. For more information about AzCopy, see [Transfer data with the AzCopy v10](../common/storage-use-azcopy-v10.md).
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- The **Azure Storage Data Movement library** is a .NET library for moving data between Azure Storage services. The AzCopy utility is built with the Data Movement library. For more information, see the [reference documentation](/dotnet/api/microsoft.azure.storage.datamovement) for the Data Movement library.
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-**Azure Data Factory** supports copying data to and from Blob storage by using the account key, a shared access signature, a service principal, or managed identities for Azure resources. For more information, see [Copy data to or from Azure Blob storage by using Azure Data Factory](../../data-factory/connector-azure-blob-storage.md?toc=%2fazure%2fstorage%2fblobs%2ftoc.json).
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-**Blobfuse** is a virtual file system driver for Azure Blob storage. You can use blobfuse to access your existing block blob data in your Storage account through the Linux file system. For more information, see [How to mount Blob storage as a file system with blobfuse](storage-how-to-mount-container-linux.md).
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It's important to design your application for high availability from the start. Refer to these Azure resources for guidance in designing your application and planning for disaster recovery:
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-[Designing resilient applications for Azure](/azure/architecture/checklist/resiliency-per-service): An overview of the key concepts for architecting highly available applications in Azure.
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-[Availability checklist](/azure/architecture/checklist/resiliency-per-service): A checklist for verifying that your application implements the best design practices for high availability.
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-[Designing resilient applications for Azure](/azure/architecture/framework/resiliency/app-design): An overview of the key concepts for architecting highly available applications in Azure.
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-[Resiliency checklist](/azure/architecture/checklist/resiliency-per-service): A checklist for verifying that your application implements the best design practices for high availability.
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-[Use geo-redundancy to design highly available applications](geo-redundant-design.md): Design guidance for building applications to take advantage of geo-redundant storage.
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-[Tutorial: Build a highly available application with Blob storage](../blobs/storage-create-geo-redundant-storage.md): A tutorial that shows how to build a highly available application that automatically switches between endpoints as failures and recoveries are simulated.
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=======
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-[Designing resilient applications for Azure]/azure/architecture/framework/resiliency/app-design): An overview of the key concepts for architecting highly available applications in Azure.
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-[Resiliency checklist](/azure/architecture/checklist/resiliency-per-service): A checklist for verifying that your application implements the best design practices for high availability.
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-[Tutorial: Build a highly available application with Blob storage](../blobs/storage-create-geo-redundant-storage.md): A tutorial that shows how to build a highly available application that automatically switches between endpoints as failures and recoveries are simulated.
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Additionally, keep in mind these best practices for maintaining high availability for your Azure Storage data:
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-**Disks:** Use [Azure Backup](https://azure.microsoft.com/services/backup/) to back up the VM disks used by your Azure virtual machines. Also consider using [Azure Site Recovery](https://azure.microsoft.com/services/site-recovery/) to protect your VMs in the event of a regional disaster.
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-**Block blobs:** Turn on [soft delete](../blobs/storage-blob-soft-delete.md) to protect against object-level deletions and overwrites, or copy block blobs to another storage account in a different region using [AzCopy](storage-use-azcopy.md), [Azure PowerShell](/powershell/module/az.storage/), or the [Azure Data Movement library](https://azure.microsoft.com/blog/introducing-azure-storage-data-movement-library-preview-2/).
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-**Block blobs:** Turn on [soft delete](../blobs/storage-blob-soft-delete.md) to protect against object-level deletions and overwrites, or copy block blobs to another storage account in a different region using [AzCopy](storage-use-azcopy.md), [Azure PowerShell](/powershell/module/az.storage/), or the [Azure Data Movement library](storage-use-data-movement-library.md).
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-**Files:** Use [AzCopy](storage-use-azcopy.md) or [Azure PowerShell](/powershell/module/az.storage/) to copy your files to another storage account in a different region.
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-**Tables:** use [AzCopy](storage-use-azcopy.md) to export table data to another storage account in a different region.
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## Initiate an account failover
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You can initiate an account failover from the Azure portal, PowerShell, Azure CLI, or the Azure Storage resource provider API. For more information on how to initiate a failover, see [Initiate an account failover (preview)](storage-initiate-account-failover.md).
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## About the preview
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Account failover is available in preview for all customers using geo-redundancy with Azure Resource Manager deployments. General-purpose v1, General-purpose v2, and Blob storage account types are supported. Account failover is currently available in all public regions. Account failover is not available in sovereign/national clouds at this time.
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You can initiate an account failover from the Azure portal, PowerShell, Azure CLI, or the Azure Storage resource provider API. For more information on how to initiate a failover, see [Initiate an account failover](storage-initiate-account-failover.md).
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3. Verify that your storage account is configured for geo-redundant storage (GRS) or read-access geo-redundant storage (RA-GRS). If it's not, then select **Configuration** under **Settings** to update your account to be geo-redundant.
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4. The **Last Sync Time** property indicates how far the secondary is behind from the primary. **Last Sync Time** provides an estimate of the extent of data loss that you will experience after the failover is completed.
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5. Select **Prepare for failover**.
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5. Select **Prepare for failover**.
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6. Review the confirmation dialog. When you are ready, enter **Yes** to confirm and initiate the failover.
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## [PowerShell](#tab/azure-powershell)
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To use PowerShell to initiate an account failover, you must first install the 6.0.1 preview module. Follow these steps to install the module:
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The account failover feature is generally available, but still relies on a preview module for PowerShell. To use PowerShell to initiate an account failover, you must first install the Az.Storage [1.1.1-preview](https://www.powershellgallery.com/packages/Az.Storage/1.1.1-preview) module. Follow these steps to install the module:
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1. Uninstall any previous installations of Azure PowerShell:
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With GRS or GZRS, the data in the secondary location isn't available for read or write access unless there is a failover to the secondary region. For read access to the secondary location, configure your storage account to use read-access geo-redundant storage (RA-GRS) or read-access geo-zone-redundant storage (RA-GZRS). For more information, see [Read access to data in the secondary region](#read-access-to-data-in-the-secondary-region).
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If the primary region becomes unavailable, you can choose to fail over to the secondary region (preview). After the failover has completed, the secondary region becomes the primary region, and you can again read and write data. For more information on disaster recovery and to learn how to fail over to the secondary region, see [Disaster recovery and storage account failover](storage-disaster-recovery-guidance.md).
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If the primary region becomes unavailable, you can choose to fail over to the secondary region. After the failover has completed, the secondary region becomes the primary region, and you can again read and write data. For more information on disaster recovery and to learn how to fail over to the secondary region, see [Disaster recovery and storage account failover](storage-disaster-recovery-guidance.md).
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> [!IMPORTANT]
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> Because data is replicated to the secondary region asynchronously, a failure that affects the primary region may result in data loss if the primary region cannot be recovered. The interval between the most recent writes to the primary region and the last write to the secondary region is known as the recovery point objective (RPO). The RPO indicates the point in time to which data can be recovered. Azure Storage typically has an RPO of less than 15 minutes, although there's currently no SLA on how long it takes to replicate data to the secondary region.
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