Migrating to Talend Data Preparation 8.0.x R2022-07 or later with an embedded MongoDB

Before you begin

If you have installed and used Talend Dictionary Service to create custom semantic types or update the predefined ones, you must migrate Talend Dictionary Service before migrating Talend Data Preparation. See Migrating Talend Dictionary Service to version 8.0.x R2022-07 or later.

Download the hybrid Talend Data Preparation 8.0.x archive from Talend Cloud's Downloads page.

Procedure

Stop your current Talend Data Preparation instance but keep the MongoDB instance running.

Back up your MongoDB by running the following command:

mongodump -h <source_mongodb_host>:<source_mongo_port> -d <source_database> -u <source_mongodb_user> -p <source_mongodb_password> -o <dump_output>

The default value for the embedded MongoDB properties are the following:

Property	Value
mongodb.host	localhost
mongodb.port	27017
mongodb.database	dataprep
mongodb.user	dataprep-user
mongodb.password	duser

Stop the MongoDB instance from the previous version of Talend Data Preparation.

Information noteNote: For Windows users, you must uninstall the current MongoDB before you install Talend Data Preparation.
Install Talend Data Preparation and select the embedded MongoDB option. Do not start the instance.
If you have installed Talend Data Preparation in service mode, stop the instance and MongoDB
Delete the database:
1. Open a mongo shell as a Talend Data Preparation database user and execute the following commands:
```
cd <install_dir>/mongodb/bin
./mongo dataprep -u dataprep-user -p dprep --port 27017
```
2. Switch to the Talend Data Preparation database: use dataprep
3. Drop the database: db.runCommand( { dropDatabase: 1 } )
4. Exit mongo shell: exit

Restore the MongoDB backup on the new 8.0 MongoDB instance by using the following command:

mongo_path>/bin/mongorestore -h <mongo_host>:<mongo_port> -u <mongo_tdp_username> -p <mongo_tdp_password> -d <mongo_tdp_database> <backup_location>

If you customized the <Data_Preparation_Path>/config/application.properties file in the previous version, you can copy the values from the old configuration file and add them to the new version. You can then change parameters needed for Talend Cloud and Talend Management Console, as explained in Configuring Talend Data Preparation after installation.
To retrieve the content of the data-set storage folder used for the previous Talend Data Preparation and migrate it to version 8.0, complete the next step according to the your situation:
- If you have set a custom value for the dataset.content.store.file.location property, make sure that you set the same value in the application.properties file for the 8.0 version.
- If you have never modified the value of the dataset.content.store.file.location property, copy the content of the <Data_Preparation_Path>/data folder used in 1.x/2.x, and paste it in the 8.0 installation folder, following the same path.
Start Talend Data Preparation.

Results

You have migrated your data to Talend Data Preparation 8.0. To configure Talend Data Preparation, follow the instructions in Configuring Talend Data Preparation.

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