Netapp Snapshot technology helps in creating point-in-time copies of file systems, which you can use to protect data—from a single file to a complete disaster recovery solution. You can create a Snapshot copies in less than a second, regardless of volume size or level of activity on your NetApp system. Currently there is a limit of 255 snapshots per volume. Read more at Netapp Tech library.
 
Here is a quick overview of the netapp snapshot management commands.
To list a snapshots on a netapp storage volume

filer2> snap list vol79
Volume vol79
working…

  %/used       %/total  date          name
———-  ———-  ————  ——–
  0% ( 0%)    0% ( 0%)  Nov 12 22:00  hourly.0
  0% ( 0%)    0% ( 0%)  Nov 12 21:00  hourly.1
  0% ( 0%)    0% ( 0%)  Nov 12 00:00  nightly.0
  0% ( 0%)    0% ( 0%)  Nov 11 00:00  nightly.1
  0% ( 0%)    0% ( 0%)  Nov 10 00:00  weekly.0
  0% ( 0%)    0% ( 0%)  Nov 09 00:00  nightly.2
  0% ( 0%)    0% ( 0%)  Nov 08 00:00  nightly.3
  0% ( 0%)    0% ( 0%)  Nov 07 00:00  nightly.4
  0% ( 0%)    0% ( 0%)  Nov 03 00:00  weekly.1
filer2>

To create a manual snapshot

filer2> snap create vol79 test123

filer2> snap list vol79
Volume vol79
working…

  %/used       %/total  date          name
———-  ———-  ————  ——–
  0% ( 0%)    0% ( 0%)  Nov 12 22:09  test123
  0% ( 0%)    0% ( 0%)  Nov 12 22:00  hourly.0
  0% ( 0%)    0% ( 0%)  Nov 12 21:00  hourly.1
  0% ( 0%)    0% ( 0%)  Nov 12 00:00  nightly.0
  0% ( 0%)    0% ( 0%)  Nov 11 00:00  nightly.1
  0% ( 0%)    0% ( 0%)  Nov 10 00:00  weekly.0
  0% ( 0%)    0% ( 0%)  Nov 09 00:00  nightly.2
  0% ( 0%)    0% ( 0%)  Nov 08 00:00  nightly.3
  0% ( 0%)    0% ( 0%)  Nov 07 00:00  nightly.4
  0% ( 0%)    0% ( 0%)  Nov 03 00:00  weekly.1
filer2>

Print the snapshot schedules for a volume (hourly, nightly, weekly snapshot)

filer2> snap sched vol79
Volume vol79: 2 5 2
filer2>

Change snapshot schedules

filer2> snap sched vol79 2 4 3
filer2> snap sched vol79
Volume vol79: 2 4 3
filer2>

Show snapshot reserve space ( the space allotted to store snapshot in volume )

filer2> snap reserve vol79
Volume vol79: current snapshot reserve is 0% or 0 k-bytes.
filer2> df -h vol79
Filesystem               total       used      avail capacity  Mounted on
/vol/vol79/            300GB      229GB       70GB      77%  /vol/vol79/
/vol/vol79/.snapshot        0MB       65MB        0MB     —%  /vol/vol79/.snapshot

Change snaphot reserve space

filer2> snap reserve vol79 5
filer2> df -h vol79
Filesystem               total       used      avail capacity  Mounted on
/vol/vol79/            285GB      229GB       55GB      81%  /vol/vol79/
/vol/vol79/.snapshot       15GB       66MB       14GB       0%  /vol/vol79/.snapshot
filer2>

To delete a snapshot

filer2> snap delete vol79 test123
filer2>

For more Netapp stuffs refer : http://unixfoo.blogspot.com/search/label/netapp

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