WAN accelerator digest sizing?

[aeos42]

Hello,

https://helpcenter.veeam.com/docs/backu ... tml?ver=95 states to allocate 5% of provisioned VM size to source WAN accelerator. https://bp.veeam.expert/resource_planni ... ation.html states to allocate 2% of "source VM disk size". Which % is correct and should provisioned or actual disk size be used?

Thanks.

[foggy]

I believe the best practices guide recommendation comes from Veeam B&R v9.0 times and just needs to be updated to the current (Veeam B&R v9.5) one you see in the help section.

[aeos42]

Thanks, foggy! Then when setting up the source WAN accelerator can I set a cache size of 0gb?

[foggy]

Yes, cache size doesn't matter on the source WAN accelerator.

[aeos42]

Then circling back to my second question, what's the reason that 9.5 requires digest space be allocated for provisioned space instead of just used space? There's a large amount of empty provisioned space in my environment and it'd be nice to not allocate digest space for it.

[foggy]

It is just a more valid estimation than the previous one, since the provisioned space might be filled with data some day and you need to get prepared to keep it's digests.