topic Stats on deduplication in ONTAP Discussions

Stats on deduplication

maillon133 — Thu, 05 Jun 2025 06:51:04 GMT

Hello,

I would like to know if it's possible to have a ratio of deduplication in command line (or with filer) for all aggregats ? (or for only one)

I see this statistics on DataDomain and i think it's interisting.

DataOntap : 7.3.2 fas 3170

Thank you for your answers.

Regards,

jeredarassier — Thu, 07 Jul 2011 15:02:53 GMT

From the command line of the filer df -s will give you used, saved and %saved per volume for that filer

Hopefully that is what you are looking for

maillon133 — Fri, 08 Jul 2011 08:50:32 GMT

Thank you for your answer.

The man of df -s :

The disk space savings generated by the shared space is

shown in the saved column. The space used plus the space

saved would be the total disk space usage, if no space was

shared. The %saved is calculated as [saved / (used +

saved)]

maillon133 — Tue, 12 Jul 2011 07:15:48 GMT

If I add the percentage of all I would get the ratio of total volume?

/vol/VOL_3/ 77029740 23178068 23%

/vol/VOL_2/ 185976036 70672132 28%

/vol/VOL_1/ 11541632 426920 4%

/vol/VOL/ 130128540 376372240 74%

(23 + 28 +4 + 74 ) / 4 = 32,25

it's correct ?

nicolasmarin — Tue, 12 Jul 2011 09:51:06 GMT

Hi there,

Have you got DFM? Im convinced you can get the answer easily from within DFM. If not you I d use excel to do this in your place.

Cheers,

Eric

maillon133 — Tue, 12 Jul 2011 10:02:23 GMT

I just want be sure that the method is good to have the total deduplication ratio for all volume.

After this, to use excel or a script shell it's easy.

Regards,