e2fsprogs 1.43 was released last summer and includes the inline_data option. I tried it out for /gnu/store. Conclusion: Not worth it.
https://social.heldscal.la/notice/1924375
https://social.heldscal.la/notice/1924409
I saved ~4% of the /gnu/store space, while losing ~5% of the partition space to larger inodes (and anything else on the same partition would probably benefit less than /gnu did).
Will try it for my hundreds of thousands of git-annex inodes some other time. My hypothesis is that it will be better than break-even on space, because I only need 512-byte inodes to house the symlinks (I used 1kB inodes for /gnu), but it might also be worth it for performance.
https://social.heldscal.la/notice/1924375
https://social.heldscal.la/notice/1924409
I saved ~4% of the /gnu/store space, while losing ~5% of the partition space to larger inodes (and anything else on the same partition would probably benefit less than /gnu did).
Will try it for my hundreds of thousands of git-annex inodes some other time. My hypothesis is that it will be better than break-even on space, because I only need 512-byte inodes to house the symlinks (I used 1kB inodes for /gnu), but it might also be worth it for performance.