1. Move to Oracle Cloud Using Zero Downtime Migration
  2. Setting Up Zero Downtime Migration Software

2 Setting Up Zero Downtime Migration Software

Follow prerequisite tasks and procedures for installing and uninstalling Zero Downtime Migration software.

The following topics detail the prerequisites and procedures for installing and uninstalling Zero Downtime Migration software.

About Setting Up Zero Downtime Migration Software

Zero Downtime Migration software is installed on a standalone Linux server.

Zero Downtime Migration software requires a Linux host running Oracle Linux 7 or later. Once the software is installed on the Linux host, that host is referred to as the Zero Downtime Migration service host. The Zero Downtime Migration service host should be a dedicated system, but it can be shared for other purposes; however, the Zero Downtime Migration service host should not have Oracle Grid Infrastructure running on it.

Parent topic: Setting Up Zero Downtime Migration Software

Prerequisites for Zero Downtime Migration Software Installation

Complete the following prerequisites before installing Zero Downtime Migration software on the Zero Downtime Migration service host.

  • Ensure that the Linux host has 100 GB of free storage space.

  • You may use an existing user, or, on the Zero Downtime Migration service host, as root user, create a zdm group and add zdmuser user to the group.

    For example,

    root> groupadd zdm
root> useradd –g zdm zdmuser

  • Verify that the glibc-devel and expect packages are installed.

    For Oracle Linux 7 installations with Base Environment "Minimal Install" you also need to install the packages unzip libaio oraclelinux-developer-release-el7.

  • Verify that the /etc/hosts entry for the host name and IP address are configured as expected, so that the host selected for Zero Downtime Migration software installation resolves to the correct IP address and the IP address is reachable with ping.

  • During the installation, the script might report any missing packages and instructions for setting appropriate values for kernel parameters. Be sure to install the missing packages and set the kernel parameters before the Zero Downtime Migration software installation.

Parent topic: Setting Up Zero Downtime Migration Software

Installing Zero Downtime Migration Software

Download the Zero Downtime Migration software and install it on the Zero Downtime Migration service host.

See the Zero Downtime Migration Release Notes for the latest information about known issues. Also, see the README file included with the downloaded Zero Downtime Migration software for any additional information about installation.

All commands are run as zdmuser.

  1. Download the Zero Downtime Migration software kit from https://www.oracle.com/database/technologies/rac/zdm-downloads.html to the Zero Downtime Migration service host.
  2. Install the Zero Downtime Migration software as a non-root user.

    In this example the installation user is zdmuser.

    1. Change to the directory to where Zero Downtime Migration software is downloaded and unzip the software. 
      zdmuser> cd zdm_download_directory
zdmuser> unzip zdm_home.zip
    2. Run the Zero Downtime Migration installation script.
      zdmuser>./zdminstall.sh setup oraclehome=zdm_oracle_home oraclebase=zdm_base_directory
        ziploc=zdm_software_location –zdm
      • zmdinstall.sh is the installation script
      • oraclehome is the Oracle Home where the Zero Downtime Migration kit will be installed
      • oraclebase is the base directory where all of the Zero Downtime Migration configuration files, logs, and other artifacts are stored
      • ziploc is the location of the compresed software file (zip) included in the Zero Downtime Migration kit

      For example,

      zdmuser>./zdminstall.sh setup oraclehome=/u01/app/zdmhome
        oraclebase=/u01/app/zdmbase ziploc=/u01/app/oracle/zdm/shiphome/zdm_home.zip
        –zdm

    Hereafter, the oraclehome value is referred to as ZDM_HOME, and the oraclebase value is referred to as ZDM_BASE.

    Ignore the following messages which are displayed on the terminal at the end of installation. There is no need to run these scripts.

    As a root user, execute the following script(s):
        1. /u01/app/zdmhome/inventory/orainstRoot.sh
        2. /u01/app/zdmhome/root.sh
  3. Start the Zero Downtime Migration service as user zdmuser.
    zdmuser> /u01/app/zdmhome/bin/zdmservice start

    You must start zdmservice before you can migrate your databases using Zero Downtime Migration.

    If you must stop the Zero Downtime Migration service, run the following command.

    zdmuser> /u01/app/zdmhome/bin/zdmservice stop
  4. Verify that the Zero Downtime Migration service installation is successful.
    When you run the following command, the output should be similar to that shown here.
    zdmuser> /u01/app/zdmhome/bin/zdmservice status
---------------------------------------
        Service Status
---------------------------------------
 
Running: true
Tranferport: 5000-7000
Conn String: jdbc:derby:/u01/app/base/derbyRepo;create=true
Repo Path: /u01/app/base/derbyRepo
RMI port: 8895
HTTP port: 8896
Wallet path: /u01/app/base/crsdata/fopds/security

Parent topic: Setting Up Zero Downtime Migration Software

Uninstalling Zero Downtime Migration Software

You can uninstall the Zero Downtime Migration software using this procedure.

All commands are run as zdmuser.
  1. Stop the Zero Downtime Migration service.
    zdmuser> /u01/app/zdmhome/bin/zdmservice stop
  2. Run the following command to uninstall the software.
    zdmuser> /u01/app/zdmhome/bin/zdmservice deinstall

Parent topic: Setting Up Zero Downtime Migration Software