skumflum wrote:

I am trying to convert a volume from dedup v2 to v3 but there is something I don't understand about the space utilized.

I am first converting it to TVV and then to TDVV on another CPG.

I used showvv -r to find out how much RAW space it used before and after. And the space used is increased by 50%.

I am skeptical about this large increase, but I know that the dedup ratio won’t be great as I only have done this with a few volumes

However I would like to get the math right. Can I somehow find the dedup ratio on a specific volume?

Thank you

I will try to explain in another way.

Showvv -r RawRsvd shows the actual RAW space the VV has reserved right?

I moved a volume from a CPG with dedup v2 R5 7+1 to another CPG R6 12+2 with dedup v2.

I did the following:

1. Converted it to thin

2. Moved it the other CPG

3. Converted it back to dedup

The volume RawRsvd was: 1429650

After the convertion it is: 2209498

I don’t get that. R5 7+1 and R6 12+2 should have the same space penalty. My guess would be that it dedups with less efficiency and that’s why I asked for dedup stats pr. Volumes. However, it may be something else.

How would you monitor the space used when taking on this task?