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| FastResync | ||
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FastResync (FR) provides enhancements to Storage Foundation.
These include the following:
Resynchronization
Optimizes the resynchronization of a mirror that is detached from and then returned to a volume.
Reconnection
Extends the snapshot model by providing the ability to refresh and reuse a snapshot, rather than discarding it.
FR increases the efficiency of the Storage Foundation snapshot mechanism and improves the performance of operations, such as backup and decision support. These operations are organized methods of collecting data and are designed to facilitate decision making). Typically, these operations require that a volume is quiescent and that they are not impeded by updates to the volume by other activities in the system. FR reduces the amount of time that a volume must be out of service during such operations.
You can enable or disable FR on a per-volume basis. When you enable FR for a volume, a Disk Change Object (DCO) volume is created to track the regions on a volume that are changed while a mirror is detached.
Note: |
Only a limited subset of operations is permitted on a DCO volume. You can perform a subdisk move, or add and remove a mirror. |
FR is automatically enabled for a volume when is performed on the volume.
The volume can be prepared through the command line interface vxassist prepare command or through the VEA GUI Prepare command.