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articles/storage/blobs/data-lake-storage-known-issues.md

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ms.subservice: data-lake-storage-gen2
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ms.service: storage
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ms.topic: conceptual
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ms.date: 03/20/2020
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ms.date: 03/27/2020
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ms.author: normesta
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ms.reviewer: jamesbak
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Get and set ACL operations are not currently recursive.
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## Premium-performance block blob storage accounts
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- Diagnostics logs can't yet be enabled by using the Azure portal. You can enable them by using PowerShell. For example:
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```powershell
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#To login
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Connect-AzAccount
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#Set default block blob storage account.
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Set-AzCurrentStorageAccount -Name premiumGen2Account -ResourceGroupName PremiumGen2Group
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#Enable logging
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Set-AzStorageServiceLoggingProperty -ServiceType Blob -LoggingOperations read,write,delete -RetentionDays 14
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```
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- Lifecycle management is currently not supported in premium-performance block blob storage accounts. Data can't be moved from the premium tier to lower tiers. The **Delete Blob** action is currently not supported, but we are working on enabling it.
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- When you create a n HDInsight cluster, you can't yet select a block blob storage accounts that have the hierarchical namespace feature enabled on it. However, you can attach the account to the cluster after you've created it.
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- Dremio doesn't yet connect to block blob storage accounts that have the hierarchical namespace feature enabled on it.
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## Lifecycle management policies
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The deletion of blob snapshots is not yet supported.
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Currently, there are several issues associated with using the WASB driver along with accounts that have a hierarchical namespace. We recommend that you use the [Azure Blob File System (ABFS)](data-lake-storage-abfs-driver.md) driver in your workloads.
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## Premium-performance block blob storage accounts
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### Diagnostic logs
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Diagnostics logs can't yet be enabled by using the Azure portal. You can enable them by using PowerShell. For example:
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```powershell
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#To login
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Connect-AzAccount
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#Set default block blob storage account.
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Set-AzCurrentStorageAccount -Name premiumGen2Account -ResourceGroupName PremiumGen2Group
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#Enable logging
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Set-AzStorageServiceLoggingProperty -ServiceType Blob -LoggingOperations read,write,delete -RetentionDays 14
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```
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### Lifecycle management policies
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- Lifecycle management policies aren't yet supported in premium-performance block blob storage accounts.
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- Data can't be moved from the premium tier to lower tiers.
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- The **Delete Blob** action is currently not supported.
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### HDInsight support
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When you create a n HDInsight cluster, you can't yet select a block blob storage account that has the hierarchical namespace feature enabled on it. However, you can attach the account to the cluster after you've created it.
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### Dremio support
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Dremio doesn't yet connect to a block blob storage account that has the hierarchical namespace feature enabled on it.
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articles/storage/blobs/data-lake-storage-supported-blob-storage-features.md

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## Supported Blob storage features
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> [!NOTE]
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> Support level refers only to how the feature is supported with Data Lake Storage Gen2. [Premium-performance block blob storage accounts](storage-blob-create-account-block-blob.md) is currently in public preview. Support-levels for those accounts appear in the **Premium block blob accounts** column.
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> Support level refers only to how the feature is supported with Data Lake Storage Gen2.
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>
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> [Premium-performance block blob storage accounts](storage-blob-create-account-block-blob.md) for Data Lake Storage Gen2 are currently in public preview. Support-levels for these types of accounts appear in the **Premium block blob accounts** column.
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|Blob Storage feature |General-purpose V2 accounts|Premium block blob accounts |Related articles |
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|---------------|-------------------|---|

articles/storage/blobs/storage-blob-create-account-block-blob.md

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The BlockBlobStorage account kind lets you create block blobs with premium performance characteristics. This type of storage account is optimized for workloads with high transactions rates or that require very fast access times. This article shows how to create a BlockBlobStorage account by using the Azure portal, the Azure CLI, or Azure PowerShell.
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[!INCLUDE [updated-for-az](../../../includes/storage-data-lake-gen2-support.md)]
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> [!NOTE]
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> The hierarchical namespace feature in a block blob storage account is in public preview, and is available in the West Central US and West US 2 regions. To review limitations, see [Blob storage features available in Azure Data Lake Storage Gen2](data-lake-storage-supported-blob-storage-features.md) and [Known issues](data-lake-storage-known-issues.md). To enroll in the preview, see this form.
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For more information about BlockBlobStorage accounts, see [Azure storage account overview](https://docs.microsoft.com/azure/storage/common/storage-account-overview).
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To learn more, see [Introduction to Azure Data Lake Storage Gen2](data-lake-storage-introduction.md).
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>[!NOTE]
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The hierarchical namespace feature in a block blob storage account is in public preview, and is available in the West Central US and West US 2 regions. To review limitations, see [Blob storage features available in Azure Data Lake Storage Gen2](data-lake-storage-supported-blob-storage-features.md) and [Known issues](data-lake-storage-known-issues.md). To enroll in the preview, see this form.
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> [!NOTE]
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> The hierarchical namespace feature in a block blob storage account is in public preview, and is available in the West Central US and West US 2 regions. To review limitations, see [Blob storage features available in Azure Data Lake Storage Gen2](data-lake-storage-supported-blob-storage-features.md) and [Known issues](data-lake-storage-known-issues.md). To enroll in the preview, see this form.
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8. Select **Review + create** to review the storage account settings.
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If you want to optimize your storage account for data analytics, then add `-EnableHierarchicalNamespace $True` to the command. To learn more, see [Introduction to Azure Data Lake Storage Gen2](data-lake-storage-introduction.md).
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> [!NOTE]
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> The hierarchical namespace feature in a block blob storage account is in public preview, and is available in the West Central US and West US 2 regions. To review limitations, see [Blob storage features available in Azure Data Lake Storage Gen2](data-lake-storage-supported-blob-storage-features.md) and [Known issues](data-lake-storage-known-issues.md). To enroll in the preview, see this form.
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## [Azure CLI](#tab/azure-cli)
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To create a block blob account by using the Azure CLI, you must first install Azure CLI v. 2.0.46 or a later version. Run `az --version` to find the version. If you need to install or upgrade, see [Install the Azure CLI](/cli/azure/install-azure-cli).
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If you want to optimize your storage account for data analytics, then add `--hierarchical-namespace true` to the command. To learn more, see [Introduction to Azure Data Lake Storage Gen2](data-lake-storage-introduction.md).
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> [!NOTE]
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> The hierarchical namespace feature in a block blob storage account is in public preview, and is available in the West Central US and West US 2 regions. To review limitations, see [Blob storage features available in Azure Data Lake Storage Gen2](data-lake-storage-supported-blob-storage-features.md) and [Known issues](data-lake-storage-known-issues.md). To enroll in the preview, see this form.
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