fpart

Fpart is a tool that helps you sort file trees and pack them into bags (called
"partitions"). It is developped in C and available under the BSD license.

It splits a list of directories and file trees into a certain number of
partitions, trying to produce partitions with the same size and number of files.
It can also produce partitions with a given number of files or a limited size.

Once generated, partitions are either printed as file lists to stdout (default)
or to files. Those lists can then be used by third party programs.

Fpart also includes a live mode, which allows it to crawl very large filesystems
and produce partitions in live. Hooks are available to act on those partitions
(e.g. immediatly start a transfer using rsync(1)) without having to wait for
the filesystem traversal job to be finished. Used this way, fpart can be seen
as a powerful data migration tool.