SnowConvert: Data Migration

SnowConvert AI, as part of the end-to-end migration experience, provides the capability to migrate your actual data from source tables to Snowflake after the database structure has been deployed. This data migration feature ensures your data is transferred efficiently and accurately to complete the migration process.

Migration Process Overview

The data migration process varies depending on your source database platform:

Amazon Redshift to Snowflake

SnowConvert migrates data from Redshift tables by unloading it to PARQUET files in an S3 bucket, then copying the data directly from those files to the deployed tables in Snowflake.

SQL Server to Snowflake

Data migration from SQL Server utilizes optimized data transfer methods to move your table data efficiently to the corresponding Snowflake tables.

Prerequisites

For Amazon Redshift Sources

Before executing data migration from Redshift, you need the following prerequisites:

S3 Bucket Requirements

  • An S3 bucket in AWS in the same region as your Redshift cluster

  • Empty bucket path (the process will fail if files exist in the specified path)

Warning

To migrate data from Redshift tables, your S3 bucket must be in the same region as your Redshift cluster. Data migration with S3 buckets in different regions will be supported in future releases.

IAM Role for Redshift

Create an IAM role associated with your Redshift cluster that can unload data to your S3 bucket:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "VisualEditor0",
      "Effect": "Allow",
      "Action": [
        "s3:PutObject",
        "s3:GetObject",
        "s3:GetBucketLocation",
        "s3:ListBucket"
      ],
      "Resource": [
        "arn:aws:s3:::<your_bucket_name>/*",
        "arn:aws:s3:::<your_bucket_name>"
      ]
    }
  ]
}
Copy

IAM User for S3 Access

Create an IAM user with permissions to read and delete objects from your S3 bucket:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "s3:PutObject",
        "s3:GetObject",
        "s3:GetObjectVersion",
        "s3:DeleteObject",
        "s3:DeleteObjectVersion",
        "s3:ListBucket",
        "s3:GetBucketLocation"
      ],
      "Resource": [
        "arn:aws:s3:::<your_bucket_name>/*",
        "arn:aws:s3:::<your_bucket_name>"
      ]
    }
  ]
}
Copy

Warning

If you don’t provide s3:DeleteObject and s3:DeleteObjectVersion permissions, the data migration will succeed, but the temporary data files will not be deleted from the S3 bucket.

For SQL Server Sources

  • Valid connection to your SQL Server source database

  • Appropriate permissions to read data from source tables

  • Network connectivity between the migration tool and both source and target systems

General Requirements

  • Completed deployment process with database structure in Snowflake

  • Active connections to both source database and Snowflake account

  • Sufficient permissions for data operations on both source and target systems

How to use this feature

This feature completes the end-to-end migration process by transferring your actual data to the deployed database structure in Snowflake.

For Amazon Redshift Data Migration

Usage

  1. Configure S3 bucket settings by clicking “Set S3 Bucket Settings” and providing:

    • S3 Bucket URL (must end with “/”)

    • IAM Role ARN for unloading data to S3

    • Access Key ID for the IAM user with S3 permissions

    • Secret Access Key for the IAM user

  2. Select tables for migration by choosing the tables whose data you want to migrate to Snowflake.

  3. Initiate data migration by clicking “Migrate Data”. This starts the process of unloading data to S3 and copying it to Snowflake tables.

  4. Monitor migration progress as the system updates the data migration status for each table, indicating success or failure.

  5. Review migration results on the results page, which validates the number of rows transferred and provides detailed information about each migrated table.

For SQL Server Data Migration

Usage

  1. Verify source connection to ensure connectivity to your SQL Server database.

  2. Select tables for migration by choosing the tables whose data you want to transfer to Snowflake.

  3. Execute data migration to transfer data from SQL Server tables to corresponding Snowflake tables.

  4. Validate migration results by reviewing row counts and data integrity reports.

Language: English