lakeFS is an open-source data version control that transforms your object storage to Git-like repositories..

lakeFS

If I'm adding a file to LakeFS without commiting it. Where is this uncommited file sitting?

Hi <@U06FYS5J6UW>, the files should be placed inside the underlaying block storage. The path configured under the repository storage namespace.
The metadata is kept in the k/v database and will be written also to the block storage after you commit.

Note that the object you will find will be kept under unique identifiers and not the original names. The logical names mapping is kept in the database and under _lakefs later when you commit.

More information can be found in <https://docs.lakefs.io/understand/architecture.html> and welcome to ask

<@U013V6T7UMC> By the underlying block storage, do you mean the object store?

The address will be the place entered when you created the repository, storage namespace - ex: <s3://my-bucket/my-path-to-repo-data>