I've been trying out the azure data lake storage iomanager. https://docs.dagster.io/_apidocs/libraries/dagster-azure#file-manager-experimental I don't want to just pickle assets, though, but rather store them as parquet or some other format. It looks like i'll need to create my own iomanager to get that. But is there any way to compose or subclass io-managers? I'd like to just modify the azure io manager, to use almost all of its functionality, but change just the details of exactly what it rights to the disk.

Hi! As far as I know, there isn't a way to configure I/O managers in this way. However, we do have a Parquet IO Manager that you can use to base your custom IO Manager off of https://github.com/dagster-io/dagster/blob/master/examples/project_fully_featured/project_fully_featured/resources/parquet_io_manager.py

thanks!