Version: 2.0

Install Data Migrator

Ready to install? Check the prerequisites and then follow these steps to get up and running with Data Migrator.

Install Data Migrator

Download Data Migrator and install it on your chosen host. If you're migrating from Hadoop Distributed File System (HDFS), install Data Migrator on an edge node in the Hadoop cluster. Run the following installation command:
```
wget https://wandisco.com/downloads/livedata-migrator.sh
```
Make the installation script executable and install as the root (or sudo) user. These commands assume that the installer is inside your working directory.
```
chmod +x livedata-migrator.sh && ./livedata-migrator.sh
```
Alternative /tmp directory
The Data Migrator installer extracts its contents to a temporary directory and decompresses them. By default, the temporary directory is a sub-directory of /tmp.
In some situations, extracting and decompressing in the default temporary directory fails. For example, if there is not enough disk space remaining, or if /tmp is mounted as noexec.
To avoid these issues, extract the contents to a different temporary directory by adding the --target option when you run the installer:
Example
./livedata-1.21.0-4-full_rpm_installer.sh --target /opt/wandisco/alternate_tmp_dir
Do not use /opt/wandisco/tmp as the value for --target or the installation will fail.
You can delete your temporary directory and its contents after installation.
Check the status of each service:
Run the following command for each of the services, listed below
```
systemctl status <service name>
```
The service names are: livedata-migrator, hivemigrator, and livedata-ui.
If your system is running without systemd the commands use a different form.

Adjust service file descriptor limit

For most production use cases we recommend increasing the Data Migrator service file descriptor limit. Contact Support if you have questions or concerns before changing this value.

To adjust the Data Migrator service file descriptor limit.

On the command line, run the systemctl edit <service> command.

Example edit livedata-migrator service

systemctl edit livedata-migrator

Add the following lines to adjust the file descriptor limit and save the changes.

Example file descriptor config values

[Service]
LimitNOFILE=64000

Reload the systemd configuration.

Example

systemctl daemon-reload

System and custom users for installation

To run the installer using a default user, run the following command:

./livedata-migrator.sh

Component	Default system user	Default system user group
Data Migrator	`hdfs`	`hdfs`
WANdisco UI	`hdfs`	`hdfs`
Hive Migrator	`hive`	`hadoop`

If your source filesystem is a mounted network-attached filesystem (NFS), enter your preferred user and user group to run the installer.

Install with custom user

To install the product using a custom user or a custom user group, run the following commands:

Light installer (Obtains all packages from remote repository.)

./livedata-migrator.sh --user <custom user> --group <custom group>

Full installer (Contains all packages, no access to remote repository required.)

./livedata-x.x.x-xx-full_rpm_installer.sh -- --user <custom user> --group <custom group>

This sets the custom user and custom user group for all services and their respective directories.

For more information about configuring custom users, go to Configure system users.

info

The light installer obtains all packages from a remote repository. The file size is small, but it must be able to access the remote repository to download the packages. The full installer, either RPM or DEB, is larger at about 1.4GB but doesn't require any remote access to install.