inodes and tree-depth in ext2

Question

I have an ext2 filesystem with a maximum number of inodes per directory (somewhere around 32k), and also a maximum number of inodes in the entire filesystem (somewhere around 350m). Because I'm using this filesystem as a datastore for a service that has in excess of 32k objects, I'm distributing those objects between multiple subdirectories (like a dictionary separates A-K and L-Z).

My question is this:

Is there any significance to the tree depth when I'm building these inodes? Is there a significant difference or limitation that's going to affect my service if I choose "/usr/www/service/data/a_k/aardvark" over "/data/a_k/aardvark"?

Answer 1

There shouldn't be any measurable difference unless you have a really memory starved system. The OS will cache the /usr/www/service/data/ directory inode and do searches from there, not go over whole hierarchy each time a file is accessed.