Point-In-Time Copies: Enterprise

This uses FlashSnap, which requires a separate license to use.

Veritas Storage Foundation with FlashSnap provides three types of PITC solutions:
* Volume-Level PITC Solutions:
- Full-Sized Instant Volume Snapshots
- Space-Optimized Instant Volume Snapshots
* Filesystem-Level Solution:
- Storage Checkpoints


Preparing to Create a Full-Sized Instant Volume Snapshot: CLI

Enable FastResync:
vxsnap –g diskgroup [-b] prepare origvol

Allocate the storage using ONE of these methods:
1) Add a mirror to use as a full-sized instant snapshot:
# vxsnap –g diskgroup addmir volume
2) Use an existing ACTIVE plex in the volume
3) Create an empty volume for use as the snapshot volume:
# LEN=`vxprint –g diskgroup –F%len volume`
# DCONAME=`vxprint –g diskgroup –F%sco_name volume`
# RSZ=`vxprint –g diskgroup –F%regionsz $DCONAME`
# vxassist –g diskgroup make snap-origvol $LEN
# vxsnap –g diskgroup prepare snap-origvol regionsize=$RSZ


Creating and Managing Full-Sized Instant Volume Snapshots: CLI

Create the snapshot volume using ONE of these methods:
1) Break off an existing plex to create the new snapshot
# vxsnap –g diskgroup make source=origvol newvol=snap-origvol plex=name

2) Specify an empty volume to be used as the snapshot:
# vxsnap –g diskgroup source=origvol snapvol=snap-origvol

Update:
# vxsnap –g diskgroup refresh snap-origvol source=origvol
# vxsnap –g diskgroup reattach snap-origvol source=origvol
# vxsnap –g diskgroup restore origvol source=snap-origvol
# vxsnap –g diskgroup dis snap-origvol

Remove:
# vxedit –g diskgroup –r rm snapvol


Note: These are a few more items that I have not transcribed. The reason being that they require additional licensing and are useful only in specific setups.