Host-based backup of VMware vSphere VMs.
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marius roma
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"Dedupe" and "Compression" meaning in reports

Post by marius roma »

In the header of each backup report I see a field "Dedupe" over a field "Compression".
My backup job is configured as Incremental, with the "Enable inline data deduplication..." check box disabled and the "Compression level" set as "Dedupe-friendly".
The targe NAS is able to perfomr deduplication.
In the "Dedupe" field of my reports I read values like 5.5x or 12.3x: what do they mean?
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Marius
foggy
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Re: "Dedupe" and "Compression" meaning in reports

Post by foggy » 1 person likes this post

Deduplication value is calculated as the backup file size in relation to the total data size, so considering that swap file blocks are still excluded and VM is pretty static, I'd expect positive dedupe rate values.
marius roma
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Re: "Dedupe" and "Compression" meaning in reports

Post by marius roma »

Thank you for the clarification.
So, can I say that the value have nothing to se to the deduplication of data being transferred to the NAS?
Where are all this information documented?
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Marius
foggy
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Re: "Dedupe" and "Compression" meaning in reports

Post by foggy » 1 person likes this post

This value has nothing in common with the storage device deduplication ratio, if this is what you mean.
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