Data migration The Virtual Machine Instance [cmdb_ci_vm_instance] table becomes the base class used for all virtualization platforms: VMware, Amazon EC2, and Hyper-V. Backup Tables The upgrade creates the following temporary tables to back up the existing virtual machine instances and associated references: temp_backup_cmdb_rel_ci temp_backup_dictionary temp_backup_vm_instance temp_backup_vm_reference Upgrade Tasks After creating the backup tables, the upgrade performs the following tasks: Copies records from the cmdb_ci_vm_instance table to the appropriate temp_backup_vm_instance table. Backs up affected relationships, references, and dictionary references to the appropriate temp_backup tables. Deletes the cmdb_ci_vm_instance table. Creates new cmdb_ci_vmware_instance and cmdb_ci_vm_instance tables. Copies and maps records from the temp_backup_vm_instance table into the cmdb_ci_vmware_instance table. Restores relationships and references Creates a clean-up job in Scheduled Jobs (Schedule Item [sys_trigger] table) called VMware Data Migration Clean-up that deletes the backup files at a scheduled time three months in the future.