Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

69Understanding Veritas Volume Manager
FastResync
Figure 1-34 Mirrored volume and snapshot volume after completion of a snapshot
operation
Effect of growing a volume on the FastResync map
It is possible to grow the replica volume, or the original volume, and still use FastResync.
According to the DCO volume layout, growing the volume has different effects on the
map that FastResync uses to track changes to the original volume:
■ For a version 20 DCO volume, the size of the map is increased and the size of the
region that is tracked by each bit in the map stays the same.
■ For a version 0 DCO volume, the size of the map remains the same and the region
size is increased.
Mirrored volume
Data plex
DCO volume
Data plex
Data change object
DCO
DCO
log plex
log plex
Snap object
Snapshot volume
Data plex
DCO volume
Data change object
DCO
log plex
Snap object