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| Extended Copy Service | ||
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The Extended Copy Service feature of VxVM works in tandem with the extended copy engines from array vendors. When VxVM detects that the source and destination devices are enabled for extended copy, VxVM automatically off loads copy requests to the array's copy manager.
The benefits of the Extended Copy Service are:
Non-disruptive copy operations from disk to disk. The host server remains online during the copy and the data being copied remains accessible to the server.
Server-free copy operation. The copy operation is done between the array subsystem and the target disk. The data copy operation does not use any CPU or I/O resources on the host server.
To see whether the Extended Copy Service feature is enabled on a disk, use the vxprint command as shown in the following example. The feature is enabled if an ecopy_enabled entry appears in the flags line.
# vxprint -l tagmastore-usp0_1b6f Disk group: privatedg5 Disk: tagmastore-usp0_1b6f info: diskid=1246621818.714.swlx59.vxindia.veritas.com assoc: device=tagmastore-usp0_1b6f type=auto flags: autoconfig device: path=/dev/vx/dmp/tagmastore-usp0_1b6fs3 devinfo: publen=2023168 privlen=65536
If required, you can use the -o noecopy option to turn off Extended Copy Service for each invocation of the vxplex att, cp, mv and snapstart commands, and the vxsd mv command.