Hi Oliver,

yes, I read that and it absolutely makes sense that the dedupe savings show up on the aggregate level, but the question is, if the tenant will also see a reduced volume footprint on the mounted volume. I guess I'll just have to give it a try on one of my demo boxes to get the answer to this question, because the documentation is not really clear to me in this regard.

Best,

Alexander Griesser Head of Systems Operations

ANEXIA Internetdienstleistungs GmbH

E-Mail: AGriesser@anexia-it.commailto:AGriesser@anexia-it.com Web: http://www.anexia-it.comhttp://www.anexia-it.com/

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Von: Oliver Gill [mailto:oliver.gill@au.de] Gesendet: Dienstag, 22. August 2017 10:34 An: Alexander Griesser AGriesser@anexia-it.com; Toasters@teaparty.net Toasters@teaparty.net Betreff: AW: Ontap 9.2 aggregate inline deduplication visible to volume owners?

Not sure about this. Did you check out TR-4476 "NetApp Data Compression, Deduplication, and Data Compaction" from May 2017?

Page 25 says "Space savings from cross-volume deduplication are reported as deduplication savings at the aggregate level.".

Best regards Oliver Gill Advanced UniByte

Von: toasters-bounces@teaparty.netmailto:toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] Im Auftrag von Alexander Griesser Gesendet: Freitag, 18. August 2017 22:36 An: <Toasters@teaparty.netmailto:Toasters@teaparty.net> Betreff: Ontap 9.2 aggregate inline deduplication visible to volume owners?

Hi,

I was reading quite some docs on the new AID (aggregate inline deduplication) feature in Ontap 9.2 but failed to find out if the space savings would be visible to the volume owners when mounting them via NFS. F.ex. if you provide an iSCSI LUN on a deduplicated volume to a tenant, he will not see the deuplication savings because they will only be at the volume level which he cannot see. For filebased storage, like CIFS or NFS shares, the tenant will immediately see the space savings due to deduplication. Is this also the case for AID or will only the volume footprint shrink on the aggregate level (since all volumes participating in AID need to be thin anyways) but the space usage in the volume will still show the non-deduped size for the tenant?

Thanks,

Alexander Griesser Head of Systems Operations

ANEXIA Internetdienstleistungs GmbH

E-Mail: AGriesser@anexia-it.commailto:AGriesser@anexia-it.com Web: http://www.anexia-it.comhttp://www.anexia-it.com/

Anschrift Hauptsitz Klagenfurt: Feldkirchnerstraße 140, 9020 Klagenfurt Geschäftsführer: Alexander Windbichler Firmenbuch: FN 289918a | Gerichtsstand: Klagenfurt | UID-Nummer: AT U63216601

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