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Operating Systems AIX What is the limitation in AIX? Post 302803845 by DGPickett on Tuesday 7th of May 2013 02:26:36 PM
Old 05-07-2013
1) lots, but large dirs are slow to process, so nobody goes there. Think of a path name for a complex object, now in place of 30k of them in one dir, look for separations and put slashes in there, and voila, smaller directories.

2) limited only by path length. Welcome to recursion. Lots of JAVA guys go nuts under windows' 255 char limit. UNIX is usually 1024 but I believe you can compile a more generous number into your kernel.

Each directory is an inode, just like a file but marked for directory handling. Think of it as a big dumb list of entry name and inode #, nothing else. Things like pipes and devices are a lot more 'special'.

Lots of O/S have just directory and flat file. Soft and hard links are not always there. Devices live somewhere outside the file tree, and if you want pipe behavior, you have to program.
 

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space(4)							   File Formats 							  space(4)

NAME
space - disk space requirement file DESCRIPTION
space is an ASCII file that gives information about disk space requirements for the target environment. The space file defines space needed beyond what is used by objects defined in the prototype(4) file; for example, files which will be installed with the installf(1M) command. The space file should define the maximum amount of additional space that a package will require. The generic format of a line in this file is: pathname blocks inodes Definitions for the fields are as follows: pathname Specify a directory name which may or may not be the mount point for a filesystem. Names that do not begin with a slash ('/') indicate relocatable directories. blocks Define the number of disk blocks required for installation of the files and directory entries contained in the pathname (using a 512-byte block size). inodes Define the number of inodes required for installation of the files and directory entries contained in the pathname. EXAMPLES
Example 1 A sample file. # extra space required by config data which is # dynamically loaded onto the system data 500 1 SEE ALSO
installf(1M), prototype(4) Application Packaging Developer's Guide SunOS 5.11 7 Feb 1997 space(4)
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