On 31.08.2017 23:05, Daniel Latrémolière wrote:
This is easy to be seen in containers, where the file system is usually the merge of multiples layers, like described in this image (from Docker [3]): https://docs.docker.com/engine/userguide/storagedriver/images/overlay_constructs.jpg Then having multiple files each with a specified set of modules allow some files to be shared between multiples containers. When we have all modules only in a single file, this file will never be the same between all containers and can never be shared. Then sharing common parts requires to convert non-shared modules in non-optimized modular JAR (blurring target of Jigsaw).
I believe that this behavior can differ from storage driver to storage driver. OverlayFS works on the file level, while the storage drivers for ZFS, btrfs, devicemapper etc. seem to work on the block level.
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