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‎articles/hpc-cache/hpc-cache-create.md

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![Screenshot of cache sizing page in the Azure portal.](media/hpc-cache-create-capacity.png)
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### Understand the relationship between throughput and cache size
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### Understand throughput and cache size
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Several factors can affect your HPC Cache's efficiency, but choosing an appropriate throughput value and cache storage size is one of the most important.
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‎articles/hpc-cache/hpc-cache-edit-storage.md

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author: ekpgh
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ms.service: hpc-cache
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ms.topic: how-to
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ms.date: 06/24/2021
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ms.date: 06/28/2021
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ms.author: v-erkel
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---
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> [!TIP]
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> The [Managing Azure HPC Cache video](https://azure.microsoft.com/resources/videos/managing-hpc-cache/) shows how to edit a storage target in the Azure portal.
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## Change a blob storage target's namespace path
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## Change a blob storage target's namespace path or access policy
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Namespace paths are the paths that clients use to mount this storage target. (To learn more, read [Plan the aggregated namespace](hpc-cache-namespace.md) and [Set up the aggregated namespace](add-namespace-paths.md)).
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The namespace path is the only update you can make on an Azure Blob storage target. Use the Azure portal or the Azure CLI to change it.
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Use the Azure portal or the Azure CLI to change the namespace path or access policy.
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### [Portal](#tab/azure-portal)
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Use the **Namespace** page for your Azure HPC Cache. The namespace page is described in more detail in the article [Set up the aggregated namespace](add-namespace-paths.md).
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Use the **Namespace** page for your Azure HPC Cache to update the namespace path or client access policy. The namespace page is described in more detail in the article [Set up the aggregated namespace](add-namespace-paths.md).
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Click the name of the path that you want to change, and create the new path in the edit window that appears.
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1. Click the path that you want to change.
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![Screenshot of the Namespace page with the cursor over an item in the Namespace path column (first column to the left). The name is formatted as a hyperlink and the cursor indicates that it can be clicked.](media/edit-select-namespace.png)
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![Screenshot of the namespace page after clicking on a Blob namespace path - the edit fields appear on a pane to the right](media/update-namespace-blob.png)
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1. Use the edit window to type in new virtual path or update the access policy.
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![Screenshot of the namespace page after clicking on a Blob namespace path - the edit fields appear on a pane to the right.](media/update-namespace-blob.png)
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After making changes, click **OK** to update the storage target, or click **Cancel** to discard changes.
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For NFS storage targets, you can change or add virtual namespace paths, change the NFS export or subdirectory values that a namespace path points to, and change the usage model.
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Storage targets in caches with some types of custom DNS settings also have a control for refreshing their IP addresses. (This kind of configuration is rare.)
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Storage targets in caches with some types of custom DNS settings also have a control for refreshing their IP addresses. (This kind of configuration is rare.) Learn how to refresh the DNS settings in [Manage storage targets](manage-storage-targets.md##update-ip-address-custom-dns-configurations-only).
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Details are below:
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* [Change aggregated namespace values](#change-aggregated-namespace-values) (virtual namespace path, access policy, export, and export subdirectory)
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* [Change the usage model](#change-the-usage-model)
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* [Refresh DNS](#update-ip-address-custom-dns-configurations-only)
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### Change aggregated namespace values
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You can use the Azure portal or the Azure CLI to change the client-facing namespace path, the storage export, and the export subdirectory (if used).
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You can use the Azure portal or the Azure CLI to change the client-facing namespace path, the storage export, and the export subdirectory (if used). If you need to change the access policy, use the Azure portal.
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Read the guidelines in [Add NFS namespace paths](add-namespace-paths.md#nfs-namespace-paths) if you need a reminder about how to create multiple valid paths on one storage target.
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### [Portal](#tab/azure-portal)
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Use the **Namespace** page for your Azure HPC Cache to update namespace values. This page is described in more detail in the article [Set up the aggregated namespace](add-namespace-paths.md).
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Use the **Namespace** page for your Azure HPC Cache to update namespace values, including the client access policy. This page is described in more detail in the article [Set up the aggregated namespace](add-namespace-paths.md).
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![screenshot of the portal namespace page with the NFS update page open at the right](media/update-namespace-nfs.png)
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### [Portal](#tab/azure-portal)
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Change the usage model from the **Storage targets** page in the Azure portal. Click the name of the storage target to change.
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Open the **Storage targets** page in the Azure portal. Click the name of a storage target in the list to open its edit page.
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![screenshot of the edit page for an NFS storage target](media/edit-storage-nfs.png)
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### Update IP address (custom DNS configurations only)
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If your cache uses a non-default DNS configuration, it's possible for your NFS storage target's IP address to change because of back-end DNS changes. If your DNS server changes the back-end storage system's IP address, Azure HPC Cache can lose access to the storage system.
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Ideally, you should work with the manager of your cache's custom DNS system to plan for any updates, because these changes make storage unavailable.
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If you need to update a storage target's DNS-provided IP address, there is a button on the Storage targets list. Click **Refresh DNS** to query the custom DNS server for a new IP address.
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![Screenshot of storage target list. For one storage target, the "..." menu in the far right column is open and two options appear: Delete, and Refresh DNS.](media/refresh-dns.png)
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If successful, the update should take less than two minutes. You can only refresh one storage target at a time; wait for the previous operation to complete before trying another.
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## Update an ADLS-NFS storage target (PREVIEW)
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Similar to NFS targets, you can change the namespace path and the usage model for ADLS-NFS storage targets.

‎articles/hpc-cache/index.yml

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url: hpc-cache-support-ticket.md
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- text: Edit a storage target
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url: hpc-cache-edit-storage.md
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- text: Manage storage targets
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url: manage-storage-targets.md
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- text: Work around firewall settings to create Blob storage targets
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url: hpc-cache-blob-firewall-fix.md
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- text: Troubleshoot NFS storage target creation

‎articles/hpc-cache/manage-storage-targets.md

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* **Force remove** - Delete a storage target, skipping some usual steps
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* **Delete** - Permanently remove a storage target
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Some storage targets also have a **Refresh DNS** option on this menu, which updates the storage target IP address from a custom DNS server. This configuration is uncommon.
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Read the rest of this article for more detail about these options.
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## Write cached files to the storage target
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## Delete a storage target
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You can use the Azure portal or the AZ CLI to delete a storage target.
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You can use the Azure portal or the AZ CLI to delete a storage target.
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The regular delete option permanently removes the storage target from the HPC Cache, but first it synchronizes the cache contents with the back-end storage system. It's different from the force delete option, which does not synchronize data.
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## Update IP address (custom DNS configurations only)
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If your cache uses a non-default DNS configuration, it's possible for your NFS storage target's IP address to change because of back-end DNS changes. If your DNS server changes the back-end storage system's IP address, Azure HPC Cache can lose access to the storage system.
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Ideally, you should work with the manager of your cache's custom DNS system to plan for any updates, because these changes make storage unavailable.
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If you need to update a storage target's DNS-provided IP address, use the **Storage targets** page. Click the **...** symbol in the right column to open the context menu. Choose **Refresh DNS** to query the custom DNS server for a new IP address.
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![Screenshot of storage target list. For one storage target, the "..." menu in the far right column is open and two options appear: Delete, and Refresh DNS.](media/refresh-dns.png) <!-- update screenshot if possible -->
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If successful, the update should take less than two minutes. You can only refresh one storage target at a time; wait for the previous operation to complete before trying another.
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## Next steps
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* Learn about [cache-level management actions](hpc-cache-manage.md)
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‎articles/hpc-cache/toc.yml

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href: hpc-cache-ingest-manual.md
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- name: Edit storage targets
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- name: Manage storage targets
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href: manage-storage-targets.md
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- name: Connect to the cache
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href: hpc-cache-mount.md
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- name: Manage the cache

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