VERITAS FlashSnap Point-In-Time-Copy Solutions Administrator's Guide

Implementing Point-In Time Copy Solutions on a Primary Host
10 VERITAS FlashSnap Point-In-Time Copy Solutions Administrator’s Guide
Implementing Point-In Time Copy Solutions on a Primary Host
The figure, “Using Snapshots and FastResync to Implement Point-In-Time Copy Solutions on a
Primary Host” on page 10, illustrates the steps that are needed to set up the processing solution on
the primary host. Note that the Disk Group Split/Join functionality is not used. As all processing
takes place in the same disk group, synchronization of the contents of the snapshots from the
original volumes is not usually required unless you want to prevent disk contention. Snapshot
creation and updating are practically instantaneous.
Using Snapshots and FastResync to Implement Point-In-Time Copy Solutions on a Primary Host
Vo l u m e
Primary Host
If required, create a cache or
1. Prepare the volumes
empty volume in the disk group,
Cache or
Empty
Vo l u m e
Vo l u m e
Snapshot
Vo l u m e
Apply the desired processing
4. Apply processing
application to the snapshot volumes.
Vo l u m e
Snapshot
Vo l u m e
Use vxsnap make to create instant
2. Create instant snapshot volumes
snapshot volumes of one or more
volumes.
Vo l u m e
Snapshot
Vo l u m e
If required, use vxsnap refresh to
3. Refresh the instant snapshots
update the snapshot volumes and
make them ready for more processing.
Repeat steps
3 and 4 as
required.
and use vxsnap prepare to prepare
volumes for snapshot creation.