>>hose sales folks may be misunderstanding the details.
>>Ask to see the details of the guarantee, and read for yourself.

I agree.  Thanks for all the responses, much more inline with what I would think.  My data is not video or audio, but I did bring that up to the sales guys and very specifically they said they could get 4:1 on it.  In fact the only example dataset they had any hesitation on promising verbally was the output of /dev/urandom.  I call BS.  Don't get me wrong, ontap9 on AFF sounds like it contains a lot of great incremental improvement and I am  excited to try one out.  I just prefer realistic promises. 

--Jordan

On Thu, Sep 22, 2016 at 3:07 PM, Brian Parent <bparent@ucsd.edu> wrote:
Those sales folks may be misunderstanding the details.
Ask to see the details of the guarantee, and read for yourself.

My experience with CDOT 8 on a AFF8020 was that video didn't compress/dedupe
hardly at all (12% savings from dedupe, 0% from compression).  Student home directories
are getting about 48% savings (close to 2:1).

I imagine certain data stores will have much better savings (like
lots of copies of VMs with identical OS images on them).

NetApp has a tool you can use to estimate savings of your own data,
though it caps the size of the analysis at 2TB (regardless of the size of the
volume being analyzed).  They call it SSET (Space Savings Estimation Tool).
I'm not sure whether that's specific to CDOT 8 or not.

Re:
> From: jordan slingerland <jordan.slingerland@gmail.com>
> Date: Thu, 22 Sep 2016 14:32:30 -0400
> Subject: AFF and 4:1 guaranteed efficiency
> To: toasters@teaparty.net
>
> Sales guys are promising me 4:1 dedup ratios on an AFF with ontap9. They
> say they grantee it.  I have specifically asked what stipulation.  In a VDI
> environment with linked clones, etc.  Sales guy tells me none and even
> specifically says they can dedup compressed video or audio (mp3) 4:1.
>
> I have A LOT of trouble believing that.  So, 4:1 dedup guaranteed or what?
>
> Any comments welcome.
>
> --Jordan

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--
Brian Parent
Information Technology Services Department
IT Infrastructure Operations Group
Workplace, Internal, Research, and Educational Platforms (WIRE) team
UC San Diego
(858) 534-6090