Slow concurrent reads on mounted loopback images

[GRANGER Nicolas]

Hi erofs team,


I'm working on a small daemon that caches and mounts disk images containing datasets based on usage (https://github.com/CEA-LIST/scratch_manager).

My understanding is that this is a good use-case for EROFS. However, in my experience concurrent reads on loopback mounted disk images are rather slow.

I tested both squashfs and erofs images so I don't think it is specific to erofs, I just can't figure out where the bottleneck is. By any chance would you have any any tips to share on that subject?


Best,

Nicolas Granger
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