> I've been involved now in three attempts to do large-scale migrations of applications written for a specific datacenter to the cloud and every time I have cra

> I've been involved now in three attempts to do large-scale migrations of applications written for a specific datacenter to the cloud and every time I have crashed upon the rocks of undocumented assumptions about the environment I've only participated in a single on-prem to cloud migration. Some parts of the migration were easy, e.g. moving a postgres DB that was running on some on-prem linux server to run in AWS RDS. Some parts were rather unpleasant: where you discover that a bunch of the application code that runs in worker processes assumes it has access to a shared CIFS network share that can be used for communication throug the filesystem, and absolute file paths to on-prem CIFS network share locations are stored in metadata throughout the database. So then your available moves for how to migrate the application code and migrate the CIFS network share and migrate the data in the database all become somewhat tangled together.