[Doum]

I have more books than you and i have 2 issues.
- Update new books between my windows source and my Nas Backup .
- Os search very slow

With this structure i can find and update easyly new ID et change some old updates with timestamp changed.

I will test it and change metadata for un read only backup .
But i think for a trigger on each new update or change .

I don't know why nobody have issues whith very large libraries .

Imagine . Just with 30000 books you have only 30 directories on first level .
Imagine . You can place on a tablespace/filesystem in read only your old books
Imagine . fast Synchronisation et no more chmod/chown on a lot of files ....
Imagine . No more issues whith inodes numbers ...

And with VM you have often large memory/cache .
But on a simple Nas, it will be very slow, so if i can not change my old stuff ...

And you already have the id in the directory name (number between () ). so it will be very easey to change/update/add and for a better sort , i will use some '0' before the ID .

root_biblio/0002000/same_directories_than_before_for_id_1001_to_2000