Re: space reporting on AFF's with compression?

Those super large artificial numbers:

Basically, if you were to rehydrate *all* the snapshots on the system, I
think that is the amount of space it would consume.
I am not a fan, more of a marketing gimmick. i wish/hope it changes. I see
questions on it way too much
--tmac

*Tim McCarthy, **Principal Consultant*

*Proud Member of the #NetAppATeam <https://twitter.com/NetAppATeam>*

*I Blog at TMACsRack <https://tmacsrack.wordpress.com/>*




On Tue, Jul 6, 2021 at 3:21 PM Jeff Bryer <[email protected]> wrote:

> I would assume that when NetApp promised you 3x savings they weren't
>
> referring to just compression.  The AFF also does in-line deduplication,
> plus
>
> there is compaction.  And some things also count in savings from snapshots.
>
>
> The 180x number, is that in the circle on the tiers page?  If you hover
> over it,
>
> it will show the value without snapshots counted.
>
>
> If you want a better break down try using (CLI):
>
> aggr show-efficiency -aggregate aggr -instance
>
>
>
> ------------------------------
> *From:* Toasters <[email protected]> on behalf of Rue, Randy <
> [email protected]>
> *Sent:* Tuesday, July 6, 2021 11:51 AM
> *To:* Toasters
> *Subject:* Re: space reporting on AFF's with compression?
>
> also, that pane says I'm getting 108X data reduction. Is that the new
> inline compression? And is that number likely to be accurate after
> NetApp promised us (in writing!) compression?
>
> On 7/6/2021 11:42 AM, Rue, Randy wrote:
> > OK, no responses to my below so let me ask a simpler question.
> >
> > The System Manager Dashboard's "Capacity" pane says I'm using 1.83PB
> > with 11.7TB available. That's clearly not accurate.
> >
> > If I click into the arrow in that pane I get the Tiers page and it
> > says my two Tiers respectively have 875TB used and 6.5TB available,
> > and 1PB used and 5.2TB available.
> >
> > What the hell are these numbers describing?
> >
> >
> > Hope to hear from you
> >
> >
> > On 6/10/2021 9:24 AM, Rue, Randy wrote:
> >> Hello All,
> >>
> >> We're migrating from a FAS to a new AFF that has inline compression
> >> and a guarantee of 3X compression.
> >>
> >> I'm trying to convert a graphite/snmp graphing system that reports
> >> our overall aggregate space usage to the new system.
> >>
> >> A straightforward graph of used and free space on the data
> >> aggregates/tiers shows the right portion of space used but seems to
> >> be reporting pre-compression usage (and we appear to be getting less
> >> than 3X).
> >>
> >> The System Manager webUI says we're getting ~120:1 "Data Reduction"
> >> but it also says we're using 1.74PB and have 14TB available. In fact
> >> we currently have 48 x 900GB SSDs in two disk groups/tiers and about
> >> 40TB of actual unstructured data.
> >>
> >> Is there a doc somewhere on understanding space reporting with the
> >> new system including meaningful reporting of compression returns?
> >>
> >>
> >> Grateful for any help,
> >>
> >> Randy in Seattle
> >>
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