I am building a Linux Docker system. Should I use ext4 or is there any need for XFS?

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1 Answer

From the Docker documentation on docker storage drivers, the default Linux storage driver is overlay2.

Both ext4 and xfs are backend filesystems that support the overlay2 file system. You don't need to switch from ext4 to xfs just because of Docker; you should be OK with the default ext4 filesystem that Ubuntu installs.