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Druva Documentation

Possible causes for slow VMware FLR(File Level Restore)

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Problem description

The VMware file level restore speed is slow

Cause

The file level restore is using VMware API’s for restore

Resolution

  1. During file level restore the phoenix VM proxy will inject Guest OS processes on the target virtual machine used for restore 
  2. If the below conditions are not met the Guest OS process injection fails and the restore will use VMware API’s for restore instead
    NOTE : The maximum restore speed using VMware APi’s would be 2-5 GB/hr
  3. For  Guest OS process injection below are the requirements
    1. Credentials must be assigned to target virtual machine for restore. This option is available during file level restore wizard
    2. Vmware tools must be installed and running on the target virtual machine
    3. Windows firewall should be disabled on the target virtual machine
    4. During the restore the Guest OS processes are injected in C:ProgramData folder in windows Hence the credentials used for restore should have write permissions to this folder.
    5. In Linux Phoenix folder is created on / partition and the the Guest OS processes are injected in it. Hence the credentials used for restore should have write permissions on / partition.
  4. If the firewall is enabled and user can’t disable it then add this rule "File and printer sharing"
  5. Add exclusion for DruvaVMwareRestoreAgent.exe in the anti-virus software
  6. If the count of number of files to be restored is large, the restore performance will be degraded
  7. Exclude the target location(folder or drive) from the antivirus
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