Re: du returns a diff size to ls.


This might help:

http://www-1.ibm.com/support/docview.wss?rs=111&context=SWG10&q1=sparse+
files&uid=isg3T1000145&loc=en_US&cs=utf-8&lang=en

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From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On Behalf Of
Bruce Whittaker
Sent: Thursday, June 29, 2006 2:19 AM
To: aix-l@xxxxxxxxxxxxx
Subject: du returns a diff size to ls.



Hi all,

a quick question...using AIX 5.2 ML7

I have a sybase device file (a sparse database file) and if I use ls -l
it returns the correct size of the file.
If I use a du -sk on the file, it returns a much smaller size (the
actual size used?)

ie,

bruce@cass4$ ls -l
-rw-r--r-- 1 syadmin sybase 62914560 Jun 27 16:38 master.dat

bruce@cass4$ du -sk *
9184 master.dat (Size is 9Meg here...)

Now... I gzipped the file, transferred it using rcp to another machine
and unzipped it. du now returns a value that matches the size found
using ls.

bruce@cass5$ ls -l
-rw-r--r-- 1 syadmin sybase 62914560 Jun 27 16:38 master.dat

bruce@cass5$ du -sk *
61440 master.dat t (Now 60 Meg...as per the ls
-l)


I find this a little confusing and I'm wondering if anyone can explain
what I'm seeing?

Bruce Whittaker,
CASS Support,

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