Filter
Top Products
66 Understanding Veritas Volume Manager
FastResync
FastResync
Note: You need a Veritas FlashSnap or FastResync license to use this feature.
The FastResync feature (previously called Fast Mirror Resynchronization or
FMR) performs quick and efficient resynchronization of stale mirrors (a mirror
that is not synchronized). This increases the efficiency of the VxVM snapshot
mechanism, and improves the performance of operations such as backup and
decision support applications. Typically, these operations require that the
volume is quiescent, and that they are not impeded by updates to the volume by
other activities on the system. To achieve these goals, the snapshot mechanism
in VxVM creates an exact copy of a primary volume at an instant in time. After a
Can be reattached to
original volume
Yes No Yes
Can be used to restore
contents of original
volume
Yes Yes Yes
Can quickly be refreshed
without being reattached
Yes Yes No
Snapshot hierarchy can
be split
Yes No No
Can be moved into
separate disk group from
original volume
Yes No Yes
Can be turned into an
independent volume
Yes No Yes
FastResync ability
persists across system
reboots or cluster
restarts
Yes Yes Yes
Synchronization can be
controlled
Yes No No
Table 1-1 Comparison of snapshot features for supported snapshot types
Snapshot feature Full-sized
instant (vxsnap)
Space-
optimized
instant (vxsnap)
Break-off
(vxassist or
vxsnap)