The historical data transfer during the

vCenter Server

migration is deactivated by default and only the core data is migrated. You can enable the historical data transfer and the deferred import by creating a history migration spec and setting

defer_import

to

true

. For example, see Figure 1. You can change the historical data scope by using the

HistoryMigrationOption

enumeration. By default, the

data_set

is set to

EVENTS_TASKS

.

You can control the deferred import by creating an import history spec and calling the methods of the

ImportHistory

class. Figure 1 shows the classes that you can use to configure and control the deferred import.