Memory/Real filesystem hybrid about file.dart HOT 3 OPEN

In other words, a copy on write memory file system that's just backed by the disk for reads.

from file.dart.

Interestingly, the testing scenario is backwards from a production scenario where you'd want the file cached in memory for fast reads and where you want writes to be persisted to the disk...

I have no idea if it'd be feasible, but I think this could be more generally useful as a CoW filesystem class that would take a pair of FileSystem arguments, and then the write destination also could be a ChrootFileSystem in /tmp or somewhere.

from file.dart.

I've taken a stab at this a couple times, but it becomes really hard to track down. I agree the CoW seems really good, but it gets really hard to keep track of once you start dealing with directories and symlinks and such. It should be possible but it's not trivial.

from file.dart.