Enabling Windows Deduplication

[sandroalves]

Hi,

I followed this recommendation for setting up deduplication, but I still don't see deduplication results.

https://www.veeam.com/blog/data-dedupli ... veeam.html

Is it because the volume (ReFS) is configured with 64K block?

I have a total of 900GB written.

Thanks.

[HannesK]

Hello,

Is it because the volume (ReFS) is configured with 64K block?

yes, that's the reason.

And if you search the forum, then you will be happy about this default setting. There is a registry key to make combine block-cloning with Windows deduplication, but the performance seems to be not very good.

So my recommendation is: keep it as it is

Best regards,
Hannes

[sandroalves]

Hi,

i found a tread that people are talking about it.

The point is that I see no benefit in enabling a deduplication that does not deduplicate.

I imagined if I formed the volume with a 4K block I would have an interesting gain, since this data will hardly be accessed frequently.

From experience I know that 4K block deduplicates a lot, but the restoration is extremely slow.


Thanks.