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Dell EMC PowerProtect DDVE in the Azure Cloud 7.8 Installation and Administration Guide

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Adding metadata disks in Azure

DDVE uses disks to save metadata. For metadata disks, Dell EMC recommends Standard HDD for cost effectiveness and Premium SSD for better performance.

  • Managed disk is recommended. Azure also enables you to convert unmanaged disks to managed disks.
  • It is not necessary to shut down the virtual machine before adding metadata disks.
  • The metadata disk is not usually resized. To add more storage to the virtual machine, you can create a new virtual disk.

Required capacity

  • Metadata disk capacity—The required metadata capacity varies based on workload. Dell EMC recommends that metadata capacity be equal to 10% of the total DDVE capacity, which is sufficient for most workloads. If your workload is using a higher deduplication ratio, consider adding more metadata disks.
  • Licensed capacity—Ensure that the DDVE instance can support the licensed capacity. If the new licensed capacity is more than the supported capacity of the DDVE instance, upgrade the DDVE instance.

Metadata disk requirements

  • For 16TB, 32TB, and 96TB DDVE instances, the minimum size of the metadata disk is 1 TiB.
  • The recommended size for all metadata disks is 1 TiB. For example, if 10 TiB of metadata capacity are required, configure ten 1-TiB metadata disks.
  • The metadata disks should be the same disk type as the OS and NVRAM disk.
  • For 256 TB DDVE instance, the recommended size for all metadata disks is 2 TiB. For example, if 20 TiB of metadata capacity are required, configure ten 2-TiB metadata disks.

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