storage of BLOBS.
The storage path is specified with fs_column_path. Each file receives
a unique name, so the storage for all FS columns can share the same
path.
Within the path specified by fs_column_path, files are stored in
sub-directories based on the first 2 characters of the unique file
names. Up to 256 sub-directories will be created, as needed. Override
_fs_column_dirs in a derived class to change this behavior.
fs_new_on_update will create a new file name if the file has been
updated.
WWW: http://search.cpan.org/dist/DBIx-Class-InflateColumn-FS/
