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***Enable Cool Access**: The coolness period defines the minimum number of days before data is transitioned to the cold tier. The default value is 31 days. The supported values are between 2 and 183 days.
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>[!NOTE]
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> The coolness period is calculated from the time of volume creation. If any existing volumes are enabled with cool access, the coolness period is applied retroactively on those volumes. This means if certain data blocks on the volumes have been infrequently accessed for the number of days specified in the coolness period, those blocks move to the cool tier once the feature is enabled. Once the coolness period is reached, background jobs can take up to 48 hours to initiate the data transfer to the cool tier.
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***Cool Access Retrieval Policy**: This option specifies under which conditions data moves back to the hot tier. You can set this option to **Default**, **On-Read**, or **Never**.
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If you don't set a value for the cool access retrieval policy, the retrieval policy is set to Default. The following table describes each policy's data retrieval behavior:
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| Setting | Behavior |
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| - | ---- |
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| Default | Cold data is returned to the hot tier when performing random reads. Data is served from the cool tier with sequential reads. |
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| On-read | On both sequential and random reads, cold data is returned to the hot tier. |
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| Never | Cold data is served directly from the cool tier. After it is moved to the cool tier, it's never retrieved to the hot tier. |
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***Cool Access Tiering policy**
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The tiering policy manages what data moves to the cool tier. You can tier all data or limit tiering to snapshots. Select one of the following policies:
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| Policy | Description |
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| - | - |
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|`Auto`| This policy encompasses both data in the active file system and snapshot copy data. |
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|`SnapshotOnly`| This policy limits tiering to data in snapshots. All data blocks associated with files in the active file system remain in the hot tier. |
Copy file name to clipboardExpand all lines: articles/azure-netapp-files/manage-cool-access.md
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@@ -159,32 +159,7 @@ You can enable Azure NetApp Files storage with cool access during the creation o
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1. On the **Capacity Pools** menu, select **Volumes**. Select **+ Add volume** to create a new network file system (NFS), server message block (SMB), or dual-protocol volume.
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1. On the **Create a volume** page, on the **Basics** tab, set the following options to enable the volume for cool access:
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* **Enable Cool Access**:
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This option specifies whether the volume supports cool access.
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* **Coolness Period**:
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The coolness period defines the minimum number of days before data is transitioned to the cold tier. Once the coolness period is reached, background jobs can take up to 48 hours to initiate the data transfer to the cool tier. The default value is 31 days. The supported values are between 2 and 183 days.
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* **Cool Access Retrieval Policy**: This option specifies under which conditions data moves back to the hot tier. You can set this option to **Default**, **On-Read**, or **Never**.
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**If you don't set a value for the cool access retrieval policy, the retrieval policy is set to Default.** The following table describes each policy's data retrieval behavior:
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| Setting | Behavior |
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| - | ---- |
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| Default | Cold data is returned to the hot tier when performing random reads. Data is served from the cool tier with sequential reads. |
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| On-read | On both sequential and random reads, cold data is returned to the hot tier. |
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| Never | Cold data is served directly from the cool tier. After it is moved to the cool tier, it's never retrieved to the hot tier. |
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* **Cool Access Tiering Policy**
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The tiering policy manages what data moves to the cool tier. You can tier all data or limit tiering to snapshots. Select one of the following policies:
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| Policy | Description |
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| - | - |
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| `Auto` | This policy encompasses both data in the active file system and snapshot copy data. |
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| `SnapshotOnly` | This policy limits tiering to data in snapshots. All data blocks associated with files in the active file system remain in the hot tier. |
:::image type="content" source="./media/manage-cool-access/cool-access-new-volume.png" alt-text="Screenshot that shows the Create a volume page. On the Basics tab, the Enable Cool Access checkbox is selected. The options for the cool access retrieval policy are displayed. " lightbox="./media/manage-cool-access/cool-access-new-volume.png":::
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1. Right-click the volume for which you want to enable the cool access.
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1. On the **Edit** window that appears, set the following options for the volume:
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* **Enable Cool Access**: The coolness period defines the minimum number of days before data is transitioned to the cold tier. The default value is 31 days. The supported values are between 2 and 183 days.
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>[!NOTE]
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> The coolness period is calculated from the time of volume creation. If any existing volumes are enabled with cool access, the coolness period is applied retroactively on those volumes. This means if certain data blocks on the volumes have been infrequently accessed for the number of days specified in the coolness period, those blocks move to the cool tier once the feature is enabled. Once the coolness period is reached, background jobs can take up to 48 hours to initiate the data transfer to the cool tier.
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* **Cool Access Retrieval Policy**: This option specifies under which conditions data moves back to the hot tier. You can set this option to **Default**, **On-Read**, or **Never**.
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**If you don't set a value for the cool access retrieval policy, the retrieval policy is set to Default.** The following table describes each policy's data retrieval behavior:
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| Setting | Behavior |
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| - | ---- |
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| Default | Cold data is returned to the hot tier when performing random reads. Data is served from the cool tier with sequential reads. |
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| On-read | On both sequential and random reads, cold data is returned to the hot tier. |
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| Never | Cold data is served directly from the cool tier. After it is moved to the cool tier, it's never retrieved to the hot tier. |
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* **Cool Access Tiering policy**
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The tiering policy manages what data moves to the cool tier. You can tier all data or limit tiering to snapshots. Select one of the following policies:
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| Policy | Description |
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| - | - |
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| `Auto` | This policy encompasses both data in the active file system and snapshot copy data. |
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| `SnapshotOnly` | This policy limits tiering to data in snapshots. All data blocks associated with files in the active file system remain in the hot tier. |
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