On Fri, Feb 09, 2018 at 01:11:23PM +0100, Ricardo Wurmus wrote: > > Hi Pjotr, > > > What is > > > > ls -1 /gnu/store/.links/|wc -l > > 495938 > > > > Never saw it before. Does this scale? > > It’s used for optional file deduplication. It is enabled by default, > but you can disable it with a daemon option on file systems that > deduplicate data at the block level.
Hmmm. I think this is better handled at the file system level if people want deduplication. These systems will be more common. > I don’t know about scalability. This number is still well below the > limits of ext4 file systems, but accessing a big directory listing like > that can be slow. I would feel a little better about this if we split > it up into different prefix directories (like it’s done for browser > caches). I don’t think it’s necessary, though. For ext4 it is going to be an issue. Anyway, we'll see what happens. Thanks for explaining. Pj.
