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A comment on DwarFS: A fast high compression read-only file system. Parent comment

Re:DwarFS: A fast high compression read-only file system by aarchi on Sunday November 29, 2020 @02:31PM (#25247371)
Is it possible to rebuild a DwarFS fs to incorporate changes from an overlay fs without decompressing, then recompressing?

It seems feasible that a second DwarFS fs could be built from an overlay/DwarFS, then delete the original overlay/DwarFS fs. That would require 2N storage as the new DwarFS is being built. Is it possible to patch an existing DwarFS?

By overlay, are you referring to overlayfs [0]?

https://wiki.archlinux.org/index.php/Overlay_filesystem

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Re:DwarFS: A fast high compression read-only file system by mhx77 on Monday November 30, 2020 @01:56PM (#25257440)
Yes, and I've documented this now:

https://github.com/mhx/dwarfs/blob/main/doc/dwarfs.md#settin...

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