Resizing NetApp Volume with SnapMirroring

Managing NetApp Volumes

Application Purpose and Scope

This document covers the management of volume size on NetApp filers

---

NetApp OnTap 7.X (7-mode systems)

The older systems running OnTap 7.x. This section will cover managing volumes on this version of the OS.

Adding space

Log into the (source) NetApp

admin$ ssh netapp-filer1
admin@netapp-filer1's password: 

netapp-filer1>

Verify the volume size that you wish to increase

netapp-filer1> df -h vol2
Filesystem               total       used      avail capacity  Mounted on
/vol/vol2/                42GB       41GB       60KB     100%  /vol/vol2/
/vol/vol2/.snapshot       14GB     5394MB     8941MB      38%  /vol/vol2/.snapshot
netapp-filer1>

Add space

netapp-filer1> vol size vol2 +10G
vol size: Flexible volume 'vol2' size set to 66g.
netapp-filer1>

Verify Space has been added

netapp-filer1> df -h vol2
Filesystem               total       used      avail capacity  Mounted on
/vol/vol2/                49GB       41GB     7762MB      85%  /vol/vol2/
/vol/vol2/.snapshot       16GB     5435MB       11GB      32%  /vol/vol2/.snapshot
netapp-filer1> 

Verify SnapMirror status

netapp-filer1> snapmirror status netapp-filer1:vol2
Snapmirror is on.
Source                Destination           State          Lag        Status
netapp-filer1:vol2     netapp-filer2:vol5     Source         00:02:39   Idle
netapp-filer1> 

Exit NetApp management console

netapp-filer1> exit
Use control-D to exit
netapp-filer1> Connection to netapp-filer1 closed by remote host.
Connection to netapp-filer1 closed.

Note: If SnapMirror is not active on this volume, you can stop here.

Log into the (destination) NetApp

admin$ ssh netapp-filer2
admin@netapp-filer2's password:  

netapp-filer2>

Verify SnapMirror destination volume to increase

netapp-filer2> df -h vol5
Filesystem               total       used      avail capacity  Mounted on
/vol/vol5/                42GB       41GB       60KB     100%  /vol/vol5/
/vol/vol5/.snapshot       14GB     5394MB     8941MB      38%  /vol/vol5/.snapshot
netapp-filer2>

Quiesce the SnapMirror destination volume

netapp-filer2> snapmirror quiesce vol5
snapmirror quiesce: in progress
 This can be a long-running operation. Use Control - C (^C) to interrupt.
snapmirror quiesce: vol5 :  Successfully quiesced
netapp-filer2>

Break the SnapMirror volume

netapp-filer2> snapmirror break vol5
snapmirror break: Destination vol5 is now writable.
Volume size is being retained for potential snapmirror resync.  If you would like to grow the volume and do not expect to 
 resync, set vol option fs_size_fixed to off.
netapp-filer2>

Change options on SnapMirror destination volume

netapp-filer2> vol options vol5 fs_size_fixed off
Wed Aug 29 11:45:00 MDT last message repeated 19 times
Wed Aug 29 11:45:49 MDT [wafl.vv.set.size:warning]: Setting volume size for vol5 to match nominal size.
netapp-filer2>

Add same amount of space to SnapMirror destination volume

netapp-filer2> vol size vol5 +10g
vol size: Flexible volume 'vol5' size set to 76g.
netapp-filer2>

Verify the space has been added to teh SnapMirror destination volume

netapp-filer2> df -h vol5
Filesystem               total       used      avail capacity  Mounted on
/vol/vol5/                49GB       41GB     7762MB      85%  /vol/vol5/
/vol/vol5/.snapshot       16GB     5435MB       11GB      32%  /vol/vol5/.snapshot
netapp-filer2>

Resync SnapMirror destination volume

netapp-filer2> snapmirror resync vol5
The resync base snapshot will be: netapp-filer2(0135107210)_vol5.85164
These older snapshots have already been deleted from the source and will be deleted from the destination:
    netapp-filer2(0135107210)_vol5.85163
Are you sure you want to resync the volume? y
Wed Aug 29 11:46:35 MDT [snapmirror.dst.resync.info:notice]: SnapMirror resync of vol5 to netapp-filer1:vol2 is using  
 netapp-filer2(0135107210)_vol5.85164 as the base snapshot.
Volume vol5 will be briefly unavailable before coming back online.
Wed Aug 29 11:46:36 MDT [wafl.snaprestore.revert:notice]: Reverting volume vol5 to a previous snapshot.
Revert to resync base snapshot was successful.
Wed Aug 29 11:46:37 MDT [replication.dst.resync.success:notice]: SnapMirror resync of vol5 to netapp-filer1:vol2 was 
 successful.
Transfer started.
Monitor progress with 'snapmirror status' or the snapmirror log.
netapp-filer2>

Verify SnapMirror operation on destination volume

netapp-filer2> snapmirror status netapp-filer2:vol5
Snapmirror is on.
Source                Destination           State          Lag        Status
netapp-filer1:vol2     netapp-filer2:vol5     Snapmirrored   00:00:07   Idle
netapp-filer2>

Exit NetApp management console

netapp-filer2> exit
Use control-D to exit
netapp-filer2> Connection to netapp-filer2 closed by remote host.
Connection to netapp-filer2 closed.