Docker-images: Databasae data files save location?

[Ijlalh90]

I want to ask when the container is up and running, where will it save the datafiles of database if persistence storage is not used?

[brunoborges]

It will save in the container layer. If you trash the container, you trash the data.

[gvenzl]

If you don't provide a mapping with the -v option Docker will create a anonymous volume for you. The data files are stored in that volume.

If you modify the Dockerfile and remove the VOLUME instruction altogether, the datafiles will be, as @brunoborges said, stored in the container itself and lost when the container is destroyed

[Ijlalh90]

@gvenzl can u point out in dockerfile where it is specified that it will create volume anonymous

[gvenzl]

Hi @Ijlalh90, the VOLUME instruction is specified here: https://github.com/oracle/docker-images/blob/master/OracleDatabase/dockerfiles/12.2.0.1/Dockerfile.ee#L74

Whether or not Docker creates a anonymous or named volume is up to the user. For more information on volumes I recommend the Docker documentation - Manage data in containers.