Why is file-based persistence not recommended for a Mule application on CloudHub?

File-based persistence is not recommended for a Mule application on CloudHub primarily because EC2 disk storage is ephemeral. This means that when a CloudHub worker is stopped or removed, all data stored on its local disk is also lost. CloudHub operates on a serverless model, where the infrastructure is managed by MuleSoft, and the underlying compute resources may change dynamically to ensure scalability and reliability. Therefore, relying on local file storage for persistence poses a significant risk to data integrity and availability, as any data stored on that local disk will be inaccessible once the worker is no longer running.

Using an alternative method for persistence, such as a cloud database or object storage service, provides a far more reliable and resilient solution. These services are designed to ensure data durability, are accessible independently of the application’s lifecycle, and can scale alongside application demand, making them far more suitable for applications run on cloud platforms like CloudHub.