To be able to save data (or share data between containers), you have to take advantage of volumes. A Docker volume is a directory (or files) that exists on the host file system (outside the Union File System). Please keep in mind, Docker for Mac runs a docker engine in a Linux VM, not your Mac OS, so you can't find the volume's mount point in your Mac OS file system. The volume files should existing in that Linux VM's file system.

As a score player it offers a series of integrated tools to support you in learning to play songs whether you can read music or not: adjusting tempo, playing in loop, chord and scale dictionaries, tuner, metronome, independent volume-tuning for each track, virtual keyboard and guitar fretboard. The software allows to edit, listen to, print, import, and export scores into several formats:.gtp,.gp3,.gp4,.gp5,.gpx (proprietary formats), MIDI, ASCII, WAV, PNG, PDF. It also offers the following options for the display of scores: full screen, horizontal/vertical scrolling, single-track/multi-track view, and zoom. Elm guitar software for mac windows 10.

This will be a set of questions and answers related to the Docker usage under OS X.

Where are my Docker files? They are supposed to be inside /var/lib/Docker but there is no such directory.

That's right Docker for Mac store all the data inside Virtual Machine which is located inside /Users/username/Library/Containers/com.docker.docker

The size of /Users/username/Library/Containers/com.docker.docker/Data directory is enormous 16GB+.

This is the normal behaviour because Docker for Mac doesn't implement TRIM to free unused space. You may find more details on Github. As for now the only working solution for me was resetting Docker (which means removing all images, containers and volumes).

Persistence in Docker for Mac.

You probably shouldn't use recommended Volumes API because it will store all your data inside Docker VM instead of your local file system. It means that when you make Docker reset (e.g. to free some space) you will loose your 'persisted' data. As for now I think that the best (safest) option is staying with Data Volume Containers. As they will be normally backed up by your Time Machine backups.

Docker is running slow (extremely slow) on OS X.

Add following line to the /etc/hosts file.

More details can be found in this Github issue.

• Full-stack developer blog by Jan Grzegorowski

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