On Thu, May 02, 2019 at 07:19:52AM -0400, Amir Goldstein wrote: > > This sounds very useful. > > Why does it have to be a new special-purpose Linux virtual file? > Why not FUSE, which is meant for this purpose? > Those are things that you should explain when you are proposing a new > filesystem, > but I will answer for you - because FUSE page fault will incur high > latency also after > blocks are locally available in your backend store. Right? >From the documentation file in the first patch: +Why isn't incremental-fs implemented via FUSE? +---------------------------------------------- +TLDR: FUSE-based filesystems add 20-80% of performance overhead for target +scenarios, and increase power use on mobile beyond acceptable limit +for widespread deployment. A custom kernel filesystem is the way to overcome +these limitations. + There are several paragraphs of more detail which I leave for the interested reader to review.... - Ted
