topic Re: directory size ..problem in Operating System - HP-UX

directory size ..problem

KCS_1 — Thu, 20 Feb 2003 10:35:00 GMT

hi, all

I am wondering about directory size on HP-UX 11.X

when i was excuting "ll" command in my root file system, all Directory size are dedicated "1024" .

also , excuted "du -sk /dir1 and /dir2" on my root file system but, size are different exactly..

what happened??

please tell me the reason so quickly, my client are complaining to me..oops!!

Re: directory size ..problem

Yogeeraj_1 — Thu, 20 Feb 2003 10:50:51 GMT

hi,

have a look at Bill Hassel's comment on this post:
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xb20b5bd3782dd711abdc0090277a778c,00.html

hope this helps!
Rrgards
Yogeeraj

Re: directory size ..problem

Stefan Farrelly — Thu, 20 Feb 2003 10:52:48 GMT

You are no comparing like for like.

When you are in / and do an ls -l the directory size you see of 1024 (bytes) is just for the directory entries themselves (ie. the table of contents for the directory), only du -sk reports the size of the directory (all files and dirs below it).

ie. Do a bdf command and you will see /var is something like several hundred MB in size, and if you do a du -sk /var it will also report a similar size (hundreds of MB), but in / an ls -l only shows the directory entry for var being 1024 bytes.

Re: directory size ..problem

Ravi_8 — Thu, 20 Feb 2003 10:53:53 GMT

Hi,

On BSD systems, du reports sizes that are half the correct values for files that are NFS-mounted from HP-UX systems. On HP-UX systems, it reports sizes that are twice the correct values for files that are NFS-mounted from BSD systems. This is due to a flaw in HP-UX; it also affects the HP-UX du program.

Re: directory size ..problem

john korterman — Thu, 20 Feb 2003 12:13:58 GMT

Hi Patrick,
in addition to what has already been said: directory files themselves contain information about the names of the files residing in the directory and their inode reference in the filesystem. In order for the directory files to keep this information neat and orderly, the directory has a certain "structure"; at least it has more "structure" than other files in the unix file system. Because of this "structure" the size of a directory is fairly fixed, e.g. 96, 512, 1024 bytes or more.
If you put a lot of files in a directory, you can see how the directory file itself suddenly grows - assuming that you put enough files into the directory. If you afterwards delete the same files from the directory, you will se that the size of the directory itself does not shrink, but that is another story.

regards,
John K.