This topic describes the limits that apply to Server Migration Center (SMC).

  • The following table lists the limits on the number of migration sources and tasks.
    Item Limit Adjustable
    Number of migration sources that can be registered 100 Submit a ticket.
    Number of migration tasks that can be created 100 Submit a ticket.
    Number of migration tasks that can be concurrently executed 20 Submit a ticket.
  • You can create only one migration task for each source server. If the migration task of a source server is unfinished, you cannot create a new migration task for the source server. A migration task is regarded as unfinished if it is in the Ready, Running, Stopped, InError, or Expired state.
  • A virtual private cloud (VPC) is created for each intermediate instance. Each Alibaba Cloud account can have a maximum of 10 VPCs in a region, including your own VPCs and the VPCs created for the intermediate instances. To raise the VPC quota, submit a ticket.
  • You must use Grand Unified Bootloader (GRUB) V1.99 or later for migration sources that run the Linux operating system. For more information, see Install GRUB in a Linux server.
    Note You must use GRUB V2.02 or later for earlier versions of operating systems such as CentOS 5, Red Hat 5, Debian 7, Amazon Linux, and Oracle Linux.
  • The SMC client is supported by the following operating systems.
    Windows Linux
    • Windows Server 2003
    • Windows Server 2008
    • Windows Server 2012
    • Windows Server 2016
    • Windows Server 2019
    • CentOS 5/6/7/8
    • Red Hat 5/6/7/8
    • Ubuntu 10/12/14/16/17/18/19/20
    • Debian 7/8/9
    • OpenSUSE 13/42/15
    • SUSE 11/12/15
    • Gentoo 13.0
    • Alibaba Cloud Linux
    • Oracle Linux 5/6/7/8
    • Amazon Linux 2014 and later