Enabling Deduplication on Netapp Volume

Below shows how to setup NetApp deduplication (formerly ASIS) on an existing volume. The following example is running NetApp Release 7.2.5.1. The license are now free, and were already installed.

Check to make sure the licensces are installed
NAS> license

nearstore_option xxxxxZH
a_sis xxxxxCG

Enable sis (deduplication) on the volume

NAS> sis on /vol/testVol
SIS for “/vol/testVol” is enabled.
Already existing data could be processed by running “sis start -s /vol/testVol”.

Initiate deduplication service


NAS> sis start -s /vol/testVol
The file system will be scanned to process existing data in /vol/testVol.
This operation may initialize related existing metafiles.
Are you sure you want to proceed with scan (y/n)? y

Thu Nov 13 10:01:38 EST [wafl.scan.start:info]: Starting SIS volume scan on volume testVol.
The SIS operation for “/vol/testVol” is started.

NAS> Thu Nov 13 10:01:42 EST [wafl.snap.delete:info]: Snapshot copy sis.93057f3c-aed8-11dd-a6d9-00a09804ad86 on volume testVol NetApp was deleted by the Data ONTAP function dense_delete_snapshot. The unique ID for this Snapshot copy is (44, 156).

Sis status will display the state and running status on all volumes
NAS> sis status

Path	State	Status	Progress
/vol/Shares	Enabled	Idle	Idle for 10:05:52
/vol/testVol	Enabled	Idle	Idle for 08:48:40
/vol/luns	Disabled	Idle	Idle for 2330:43:02
/vol/vm	Enabled	Idle	Idle for 00:09:35

View the status on a specific volume


NAS> sis status /vol/testVol

Path	State	Status	Progress
/vol/testVol	Enabled	Idle	Idle for 00:11:23

After sis completes, use df to show the amount saved and deduplication percentage
NAS> df -sh /vol/testVol

Filesystem	used	saved	%saved
/vol/testVol/	519GB	754GB	59%

Verify that sis is scheduled to run frequent enough at the times you want
NAS> sis config

Path	Schedule
/vol/shares	sun-sat@0
/vol/testVol	sun-sat@0
/vol/luns	sun-sat@0
/vol/vm	sun-sat@0

Below is the help output of sis config
NAS> sis help config
sis config [ [ -s schedule ] | … ]
- Sets up, modifies, and retrieves the schedule of SIS volumes.

Reschedule for nightly at 11pm

NAS>sis config -s sun-sat@23 /vol/testVol

Verify the new configuration

NAS> sis config /vol/testVol

Path	Schedule
/vol/testVol	sun-sat@23

Note: ASIS is not real time deduplication. It is ran on a schedule instead of as the data is coming in. Also, when setting the schedule for a volume, you can only specifiy the hour to start running, in this case trying to specify sun-sat@23:45 did not work when testing