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# Configure VMware vSAN (ESA)
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VMware [vSAN](https://techdocs.broadcom.com/us/en/vmware-cis/vsan/vsan/8-0/release-notes/vmware-vsan-803-release-notes.html) ESA (Express Storage Architecture) offers enhanced capabilities that are configured by default with each Azure VMware Solution deployment. Each cluster uses its own high-performance vSAN ESA datastore. Below are the Azure VMware Solution SKUs that support vSAN ESA as the default architecture type, along with the following configurations per cluster:
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VMware [vSAN](https://techdocs.broadcom.com/us/en/vmware-cis/vsan/vsan/8-0/release-notes/vmware-vsan-803-release-notes.html) ESA (Express Storage Architecture) offers enhanced capabilities that are configured by default with each Azure VMware Solution deployment. Each cluster uses its own high-performance vSAN ESA datastore. The following table shows the Azure VMware Solution host types that support vSAN ESA as the default architecture type, along with the configurations per cluster:
> Run commands are executed one at a time in the order submitted.
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In this article, learn how to:
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In this article, you learn how to:
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> [!div class="checklist"]
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> - Supported host types
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> - All VMs in vSAN ESA clusters are set by default to use UNMAP inherited from the cluster level. UNMAP can be disabled using the disk.scsiUnmapAllowed flag with a value of 'false' at the virtual machine level, should you wish to disable this behavior on a per-VM basis. VMX file changes require a reboot to take effect.
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> - The guest operating system must be able to identify the virtual disk as thin.
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## Set VMware vSAN Space Efficiency
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## Set VMware vSAN space efficiency
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In vSAN ESA (Express Storage Architecture), space efficiency is enabled through Storage policy managed compression. See [VMware documentation](https://techdocs.broadcom.com/us/en/vmware-cis/vsan/vsan/8-0/vsan-administration/increasing-space-efficiency-in-a-vsan-cluster/using-deduplication-and-compression-in-vsan-cluster.html).
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Run the `Set-vSANDataInTransitEncryption` cmdlet to enable or disable data-in-transit encryption for all clusters or specified clusters of an SDDC.
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> [!NOTE]
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> Changing this setting causes a performance impact. See [VMware KB](https://blogs.vmware.com/virtualblocks/2021/08/12/storageminute-vsan-data-encryption-performance/).
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> Changing this setting impacts performance. See [VMware KB](https://blogs.vmware.com/virtualblocks/2021/08/12/storageminute-vsan-data-encryption-performance/).
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1. Sign in to the [Azure portal](https://portal.azure.com/).
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## vSAN services availability
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The table below shows the list of vSAN features available in Azure VMware Solution.
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The following table shows the list of vSAN features available in Azure VMware Solution.
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