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Veeam Community Forums - How to improve backup speed: VCB performance in SAN mode geeft aan dat in sommige gevallen de snelheid van VCB backup verhoogt kan worden door HBA drivers te updaten en/of multipathing uit te zetten op de VCB-proxy server.

SYNC driver

Considerations When Creating Snapshots
When creating snapshots, keep in mind the following:

Taking a snapshot of a virtual machine freezes it for a very short period of time, usually considerably less than a second.
Creating a memory snapshot through the UI can leave a virtual machine frozen for a couple of seconds. This might affect some very time-sensitive applications, such as DBHammer.
Creating quiesced snapshots using the SYNC driver requires waiting for I/O to drain in the guest operating system. This might affect some very time-sensitive applications, such as DBHammer.
If you choose not to install the SYNC driver when installing VMware Tools, you can avoid the delay caused by the I/O draining. However, it results in snapshots being only crash-consistent, unless you provide custom quiescing through pre/and post-scripts in the guest.