Heterogeneous migration configuration guide

About heterogeneous migration

Heterogeneous migration allows migration of disk data on physical x86 servers, VMs managed by CAS CVM, and VMs managed by another platform to destination VMs on CAS CVM. It requires client installation on the source device.

This document uses an environment shown in Figure-1 as an example.

Figure-1 Migration environment

Restrictions and guidelines

Follow these restrictions when you perform incremental migration or incremental backup for disks:

Item

Restriction

Capacity limit on a volume or disk

The maximum capacity cannot exceed 128 TB.

As a best practice, make sure a disk or volume does not exceed 32 TB if you perform live migration.

Incremental data limit

The maximum data change cannot exceed 1 TB in an incremental backup or migration interval.

Make sure a single file does not exceed 4 TB when you perform fast migration (migrates only disk space in use) or disaster recovery for EXT2, EXT3, or EXT4 file systems.

For more restrictions, see the usage guidelines for this version or contact H3C Support.

Procedure

Table-1 Configuration procedure

Task		Description
Prepare a source device	Download an installation package	Download a migration client from CVM to a source device (physical server or VM).
Prepare a source device	Install the migration client	Install the migration client and connect the source device to CVM. Then, the migration client reports the status of the source device to CVM.
Prepare a destination VM	Obtain the PE image	Mount the PE image to the destination VM
	Create a destination VM	Mount the PE image to the destination VM
	Configure TargetClient	Configure the TargetClient, and connect TargetClient to CVM. Then, the TargetClient reports the status of the destination VM to CVM.
Perform a migration	Create a migration task	Create and start a migration task. The migration client receives the migration command and starts migrating the system disk and data disk.
	Configure a driver	Migrate system disks and data disks.
	Access the destination VM	Migrate system disks and data disks.

Figure-2 Heterogeneous migration