Storage vMotion operations can also benefit from XCOPY acceleration and offloading. Using the same VM configuration as the previous example, the following will show performance differences of migrating the VM from one datastore to another with and without XCOPY enabled. Results will be shown for three different scenarios:
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Powered-on virtual machine running a workload. 32 KB I/O size, mostly random, heavy on writes.
The chart below shows the results of the tests.
Figure 12. Storage vMotion duration
The chart shows that both a “live” (powered-on) Storage vMotion and a powered-off migration can equally benefit from XCOPY acceleration. The presence of a workload slows down the operation somewhat but nevertheless, a substantial benefit can still be observed.