Re: space reporting on AFF's with compression?

Yeah, that's not a useful number in any context and it just creates 
confusion. What I need to know is how much uncompressed data I'm serving 
and what portion of the physical space it's consuming. I need to know 
what my users are storing and when I need to plan for expansion.

On 7/6/2021 8:18 PM, tmac wrote:
> 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] 
> <mailto:[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]
>     <mailto:[email protected]>> on behalf of Rue, Randy
>     <[email protected] <mailto:[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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