Hyper-V performance tuning ?

[Michael_G_Ander]

Is trying to find something about performance tuning of Hyper-V backups, and so far have not be able to find anything.

I am thinking the increasing the raw partition read buffer size on the Hyper-V hosts like you do for VMWARE backups might be a starting point.

Is there someone who has already looked into this ?

[Marianne]

Hi Michael

If upgrade to Hyper-V 2016 and NBU 8 is an option. you may want to look into these cool new features listed in NBU 8 NetBackup Release Notes  :

Faster backup of Hyper-V virtual machines on Windows Server 2016
NetBackup 8.0 adds the following features for faster backup and recovery of Hyper-V
virtual machines on Windows Server 2016. These features require the new WMI
backup method (not VSS):
■ Block-level incremental backup, with Microsoft's resilient change tracking (RCT)
to perform faster VM backup and recovery.
■ Accelerator, which uses Microsoft's resilient change tracking for faster backup
(full and incremental).
■ New resource limit settings for Hyper-V Server 2016 and the WMI backup method.

■ Support for new storage types: Windows Server Message Block (SMB) 3.0 file shares, and Windows Storage Spaces and Storage Spaces Direct.
■ The WMI backup method adds support for the ReFS file system on Windows Server 2016.
■ Policy Query Builder options to filter VMs based on their VM configuration version:
ConfigurationVersion (for standalone Hyper-V servers and clusters)
VMConfigurationVersion (for SCVMM 2016 servers)
■ Enhancements for restoring a VM that was backed up with the WMI method:
■ A new VM GUID is generated by default when you restore a VM to an
alternate location. As an option, you can choose to keep the original GUID.
■ A new VM display name can be specified when you restore a VM.
For further details on these features, see the 8.0 version of the NetBackup for
Hyper-V Administrator's Guide available through the following URL:
http://www.veritas.com/docs/DOC5332

[Michael_G_Ander]

The problem is that at the moment neither Windows 2016 or NBU 8.0 is an option for us, so was looking for ways to improve "legacy" Hyper-V backups.

[Michael_G_Ander]

Heard back from our Veritas contact and there is no recommendations for performance tuning "legacy" Hyper-V backups. The closest he has gotten is to follow the general Hyper-V performance tuning guides.

My original idea of increasing the raw partition read buffer size, did not give anything either.

[Michael_G_Ander]

Might have been to fast to disregard the raw partition read buffer size as it turns out that we had some limitation due to the communication buffer size.

[sdo]

Interesting...

[Michael_G_Ander]

Found an article that claims that vhdx is using 4 KB blocks internally, so will try the counter intuitive thing next week and decrease the raw partion read size to 4 KB.

[sdo]

Using CSV volumes?