Duplicate data deletion (De-duplication, DDD) is one of the advanced features of networked storage devices, which can effectively reduce the storage space occupied by duplicate data and increase the space utilization of storage devices.
The data de-duplication feature for NetApp filer is called a-sis. When applying the command line in the following example, replace the/vol/vol1 with your own volume name.
"Applied Articles"
Add license
>license Add a-sis
>license Add Nearstore
Open
On the volume that need to remove duplicate data, turn on the duplicate data deletion function
> Sis On/vol/vol1
If the volume space is insufficient, the following error occurs
> Sis On/vol/vol1
Creation of metafile failed:/vol/vol1
Start scanning and duplicate data deletion immediately
> Sis Start–s/vol/vol1
Check for duplicate data deletion during scan and run
> Sis Status/vol/vol1
You can repeatedly press the UP ARROW to repeat this command to view the real-time situation.
Example:
nas01> SIS Status/vol/vol1
/vol/vol1 Enabled Active GB scanned
nas01> SIS Status/vol/vol1
Path State Status Progress
/vol/vol1 Enabled Active GB scanned
nas01> SIS Status/vol/vol1
Path State Status Progress
/vol/vol1 Enabled Active MB (0%) Done
nas01> SIS Status/vol/vol1
Path State Status Progress
/vol/vol1 Enabled Active 5225 MB (12%) Done
When SIS runs over, check volume footprint changes by DF
> Df-s/vol/vol1
Configure schedule for duplicate data deletion
View the current run time
> Sis Config/vol/vol1
Path Schedule
/vol/vol1 sun-sat@0
The default is 7 days a week, 0 points per day.
The following command changes the run time to Monday to Friday, and executes 23:00 daily
> sis config-s mon-fri@23/vol/vol1