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Home -> Community -> Mailing Lists -> Oracle-L -> RE: UNIX question du vs df -> large discrepancy
You didn't mention the UNIX flavor. The AIX backup? command used to,
perhaps still does, employ a compression algorthm which results in files
being truncated after the last piece of data. For instance you create a
100MB tablespace, put 1 MB of
data in the tablespace, and use the AIX backup facility for your Oracle
backups. On restore the file still appears to be
100MB in size, but in reality 99 MB have been returned to the free list, and
the difference between df and du shows the
discrepancy.
Ian
Ian MacGregor
Stanford Linear Accelerator Center
ian_at_slac.stanford.edu
-----Original Message-----
From: Troiano, Paul (CAP, GEFA) [mailto:Paul.Troiano_at_gecapital.com]
Sent: Tuesday, July 25, 2000 3:08 PM
To: Multiple recipients of list ORACLE-L
Subject: UNIX question du vs df -> large discrepancy
Any ideas? 936 kb vs 480 Mb is good size difference. It's been like this for two days. du reflects what I see in the directories.
df -k /opt/oracle
Filesystem kbytes used avail capacity Mounted on
/dev/vx/dsk/rootdg/Oraclefiles
479982 479514 0 100% /opt/oracle
du -dsk /opt/oracle
936 /opt/oracle
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