SANRAD V-Switch manual Synchronizing a Volume, 140

Synchronizing a Volume

If one child of a mirrored volume, the source, already contains data, the data can be replicated to the second child, the destination, using the CLI command volume mirror sync. This can be done on-line while the source volume is still exposed or off-line while both the source and destination volumes are unexposed. See how to expose volumes “Volume Exposure & Security,” page 107. On-line data replication is slower but allows the source volume to remain on-line with no interruption of service to the volume host(s). Off-line replication is faster than on-line replication but both the source and destination volumes must be taken off-line which can create an interruption of service to the volume host(s).

See the working example of off-line data replication “Replicating Data Off- line,” page 264.

volume mirror sync

You need to define two parameters to synchronize a volume:

SWITCH PARAMETER DEFINITION STATUS EXAMPLE

-src

SOURCE	ORIGINAL VOLUME MANDATORY	Simple3
VOLUME	TO SYNCHRONIZE
	TO

-dst

DESTINATION	NEW VOLUME TO	MANDATORY	Simple5
VOLUME	ADD TO
	SYNCHRONINZE

Example:

The on-line volume Simple3 is synchronized to the on-line volume Simple5.

volume mirror sync –src Simple3 –dst Simple5

140 SANRAD V-Switch User Manual