I want to check read and write spead of a shared volume in Hyper-v cluster

Question

hello
I have shared volumes for hyper-v cluster , the issue is that some volumes have low read speed 3 MBs as backup solution show "veeam" ,I tested the read speed by some tools it give also 4 or 3 MBs read speed

My questions:
Is it possible to change the default read or write speed of a volume (Cluster shared volumes or regulate volumes)?
how this change can be detected and how to be reset to default speed ?
Which registry key or volumes parameters responsible for that ?

I have another issue regarding space reclamation on volumes , How to make sure that the Microsoft windows operating system is notifying the storage system about used blocks and unused block (for thinly provisioned volumes)because some times we have free space shown in the host (for example we just deleted 5 tera of data )but not reclaimed by storage system even after deleting data for more than one day , it is clearly host side issue as we do not have this issue in all clusters connected to the same storage system ,
My Questions : How to check this feature ? enable it disable it ? which registry key and default value for that ?
which volume parameters that control this feature

I have another issue regarding creating storage snapshot by storage system form cluster shared volume , I have error shown form storage system side that it can not quiescence IO on the volume to take the storage snapshot (not hyper-v checkpoint) ,
My questions:
Which volumes parameters or registry key that could cause this issue to be checked ?

Thanks

Answer 1

Hi,

Thank you for posting your query.

Kindly follow the steps provided below to resolve your issue.

Cluster Shared Volumes (CSV) enable multiple nodes in a Windows Server failover cluster or Azure Stack HCI to simultaneously have read-write access to the same LUN (disk) that is provisioned as an NTFS volume. The disk can be provisioned as Resilient File System (ReFS); however, the CSV drive will be in redirected mode meaning write access will be sent to the coordinator node. For more information, see About I/O synchronization and I/O redirection in CSV communication later in this document. With CSV, clustered roles can fail over quickly from one node to another node without requiring a change in drive ownership, or dismounting and remounting a volume. CSV also help simplify the management of a potentially large number of LUNs in a failover cluster.

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