topic Re: Snapmirror XDP with Efficiency on the Destination.. in ONTAP Discussions

Snapmirror XDP with Efficiency on the Destination..

Fabian1993 — Wed, 04 Jun 2025 10:45:42 GMT

Dear Community,

I have a Question on the following Szenario:

Cluster A , Volume with Dedup enabled -> Snapmirror XDP to Cluster B AFF System all Efficieny function are enabled.

after I break the Mirror and went online on Cluster B I have Dedup Savings.

But the Table says it must be LSR and all Efficieny functions will be regenerated on the destination, so how can I use compaction and compression on that Volume?

Re: Snapmirror XDP with Efficiency on the Destination..

paul_stejskal — Thu, 12 Nov 2020 16:12:28 GMT

From what I've seen, dedupe scans run in the background in XDP after the update finishes. You can confirm by viewing the SIS log file on the destination filer. Open the SPI (https://clustermgmtIP/spi), then go to logs, and there should be a sis log file, or sis.1, sis.2, etc. Those are just text files. You should see something where it does a "sis start vault".

I'm 90% sure that you should have a dedupe scan after the XDP finishes, but that should confirm it 100%.

Re: Snapmirror XDP with Efficiency on the Destination..

ttran — Wed, 18 Nov 2020 10:23:51 GMT

Hi Fabian1993,

You can use the following commands to check volume efficiency:

::> volume efficiency show

::> volume efficiency stat -vserver <VSERVER_NAME> -volume <VOLUME_NAME>

::> volume efficiency policy show

You can use the following command to enable compaction, compression, and the compression type with the following command:

::> volume efficiency modify -volume <VOLUME_NAME> -compression true -compression-type adaptive -compaction true

You can use the following documents as reference:

Managing inline data compaction

Enabling deduplication

Enabling compression

KB: How to see space savings from deduplication, compression, and compaction in ONTAP 9

You can also include the "-instance" flag at the end of most commands to view more information, i.e. volume efficiency show -instance.

Regards,

Team NetApp

Re: Snapmirror XDP with Efficiency on the Destination..

Fabian1993 — Wed, 18 Nov 2020 11:55:30 GMT

Nothing worked, only If i delete the old Snaps, the the commands with scan-blocks and manuell starts will work and the Efficiency functions during their Jobs, but with the old Snapshots it doesn't work...