tmpfs mounts

tmpfs is a filesystem type in Unix-like operating systems (including Linux) that allows you to create a filesystem in memory, meaning it resides in RAM rather than on disk. It's commonly used for temporary data storage and can be particularly useful in situations where you need fast access to data.

In Docker, you can use tmpfs mounts to create temporary filesystems within containers that are stored in memory. This can be beneficial for certain use cases such as caching, temporary file storage, or for applications that require fast read and write operations.

In the context of Docker, tmpfs mounts allow you to mount a temporary file system into a container’s filesystem, which resides in memory rather than on disk. This can be useful for scenarios where you need a filesystem that is fast and volatile, such as storing temporary files or caches.

Tmpfs mounts in Docker can be particularly useful for improving performance or reducing wear on disk storage in situations where temporary data needs to be quickly accessed and doesn’t need to persist beyond the lifetime of the container.

Volumes and bind mount let you share files between the host machine and container so that you can persist data even after the container is stopped.

If you’re running Docker on Linux, you have a third option: tmpfs mounts. When you create a container with a tmpfs mount, the container can create files outside the container's writable layer.