I want to Migrate database resources from one subscription to another subscription with in Azure

Hi Mukesh Tanuku
I understand that moving your PostgreSQL Flexible Server from an unmanaged to a managed subscription is critical for your operations, and I appreciate the opportunity to help clarify the best approach.
There are a few options to consider:
1.Using Azure’s Resource Move Feature: Many Azure resources support a direct move across subscriptions using the Azure portal’s “Move” functionality. Check if your PostgreSQL Flexible Server qualifies for a resource move; this can simplify the process by transferring the resource along with its settings to the managed subscription. Do note, however, that some managed services might have limitations or specific prerequisites when being moved. For more detailed information, you can refer to Move resources to a new resource group or subscription.
2.Leveraging the Azure Database Migration Service (DMS): If the direct move isn’t feasible or if you require minimal downtime, the Azure Database Migration Service is designed to streamline the process of migrating PostgreSQL databases. By setting up a new PostgreSQL Flexible Server in the managed subscription and using DMS, you can perform a schema and data migration with lower impact on your production workload. This method is particularly useful if you need a carefully controlled migration process. More details are available in the Migration Service in Azure Database for PostgreSQL documentation.
3.Backup and Restore (using pg_dump/pg_restore): For scenarios with some acceptable downtime, you could manually back up your database using pg_dump and then restore it to a newly created PostgreSQL Flexible Server in the managed subscription with pg_restore. This approach is straightforward but generally best suited for smaller databases or situations where a short downtime window is permissible.
Key Considerations:
Downtime: Each option may involve some downtime. Using DMS might allow you to minimize this, whereas backup/restore typically requires a longer window.
Compatibility: Ensure that both the source and target environments are running compatible PostgreSQL versions to avoid any incompatibility issues.
Networking and Security: After migration, review the network settings (like VNet, DNS, and firewall rules) on the new server in the managed subscription to ensure continuity.
Based on these options, if you’re looking for a method that minimizes downtime and provides a managed, end-to-end process, the Azure Database Migration Service would be the preferred approach. If the PostgreSQL Flexible Server supports the move operation, that could be the easiest path—provided there are no restrictions in your current setup.

I hope this helps outline the options and guides you toward the best solution for your scenario. Please let me know if you have any further questions or need additional details on any of these approaches.

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Hello Mukesh Tanuku
Just checking in to see if the below answer helped. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know. 

Hello Mukesh Tanuku Just checking in to see if the Above answer helped. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.