2 Setting Up Zero Downtime Migration Software
Whether you are performing a new Zero Downtime Migration software installation, updating existing software to the latest release, or removing the software, read the appropriate topics carefully as there may have been changes since the last time you performed the task.
Always 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 software installation and updates.
- Performing a New Zero Downtime Migration Software Installation
If a host has not had Zero Downtime Migration software installed on it previously, verify that it complies with the requirements and perform any pre-installation tasks, then download and install the software. Once the software is installed, the host is referred to as the Zero Downtime Migration service host. - Updating Zero Downtime Migration Software
If you already have Zero Downtime Migration software installed on a host, you can update it to the lastest release. Zero Downtime Migration software updates give you the latest fixes while retaining existing job information, metadata, and log files. - Uninstalling Zero Downtime Migration Software
Remove Zero Downtime Migration software from the Zero Downtime Migration service host.
Performing a New Zero Downtime Migration Software Installation
If a host has not had Zero Downtime Migration software installed on it previously, verify that it complies with the requirements and perform any pre-installation tasks, then download and install the software. Once the software is installed, the host is referred to as the Zero Downtime Migration service host.
- Prepare a Host for Zero Downtime Migration Software Installation
Provision a host with the following prerequisites and complete the following preinstallation tasks before installing Zero Downtime Migration software on it. - Install Zero Downtime Migration Software
Download the Zero Downtime Migration software and install it on the Zero Downtime Migration service host.
Parent topic: Setting Up Zero Downtime Migration Software
Prepare a Host for Zero Downtime Migration Software Installation
Provision a host with the following prerequisites and complete the following preinstallation tasks before installing Zero Downtime Migration software on it.
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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.
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Zero Downtime Migration software requires a standalone Linux host running Oracle Linux 7 or later.
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The Zero Downtime Migration service host must be able to connect to the source and the target database servers.
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Ensure that the Linux host has 100 GB of free storage space.
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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
andexpect
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 withping
. -
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.
Updating Zero Downtime Migration Software
If you already have Zero Downtime Migration software installed on a host, you can update it to the lastest release. Zero Downtime Migration software updates give you the latest fixes while retaining existing job information, metadata, and log files.
Before you begin the software update, review the following requirements.
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Verify that your existing Zero Downtime Migration software install location has at least 15GB free space.
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Important: Run the update script from outside of the currently installed Zero Downtime Migration home.
Running the script from within a Zero Downtime Migration home results in home install and uninstall failures and leaves the service in an inconsistent state.
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The path specified in
ziploc
should have read/write access for zdmuser. -
All of the commands in the following procedure should be run as the existing Zero Downtime Migration software owner. For example, run as
zdmuser
in the examples that follow.
Parent topic: Setting Up Zero Downtime Migration Software
Uninstalling Zero Downtime Migration Software
Remove Zero Downtime Migration software from the Zero Downtime Migration service host.
Parent topic: Setting Up Zero Downtime Migration Software