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Migrating Data from MySQL/MongoDB to CloudBase Cloud Database

Migration Instructions​

This article covers migration from MySQL and MongoDB to CloudBase Cloud Database, and other database migrations are largely similar.

Migration is roughly divided into the following steps:

  1. Export the database from MySQL and MongoDB to JSON or CSV format
  2. Create a CloudBase environment
  3. Go to the CloudBase database and create a new collection
  4. Import JSON or CSV format files into the collection

Export​

Exporting MySQL Data​

In the following steps, we use Navicat for MySQL for exporting. You can also use other MySQL export tools.

Export to CSV Format​

Select the table(s) and export

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Select csv format in the type

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Note: In step 4, we need to check the option to include column headers.

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The exported csv file contains the first row with all key names, and each subsequent row contains corresponding key-value records matching the key names in the first row. For example:

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Export to JSON Format​

Similarly, we will export the selected table(s) in json format:

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For the remaining steps, simply accept all default settings.

What does the exported result look like?

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What does the final result look like after removing the array?

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Exporting MongoDB Data​

First, start the mongod service:

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Do not close this terminal after starting.

Export to CSV Format​

Open a new terminal and enter the following command

mongoexport -db <database> --collection <collection name> --type csv -f <field1[,field2]> -o <output file path>

For more detailed parameter descriptions, please refer to the MongoDB documentation.

Note: When exporting to csv format, you must specify the field names to export; otherwise, an error will occur:

csv mode requires a field list

Exported result:

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Export to JSON Format​

Open a new terminal and enter the following command:

mongoexport -db <database> --collection <collection name> -o <output file path>

For more detailed parameter descriptions, please refer to the MongoDB documentation.

Exported result:

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Import​

Create a New Cloud Environment​

If you already have a cloud environment, you can skip this step and directly open the Cloud Development Console to create a new cloud environment:

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After creating the environment, please wait patiently for the 2-minute initialization process.

Database Import​

Click Add Collection to create a collection:

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After creating it, we click to enter and perform the import operation:

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Select the previously exported CSV or JSON format file.

Note

There are two conflict resolution modes: Insert and Upsert

  • Insert mode always inserts new records during import. Duplicate _id fields are not allowed in the same file or matching existing _id values in the database. Use Insert mode if you want to prevent existing data from being overwritten.
  • Upsert mode checks whether a record exists. If it exists, the record will be updated; otherwise, a new record will be inserted. Use Upsert mode if you want to avoid redundant or duplicate data. :::

Here we select Upsert mode:

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After the import process is complete, the imported data can be viewed in the database:

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