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gzip -l does not deal correctly with large files
From: |
Knappke, Christian |
Subject: |
gzip -l does not deal correctly with large files |
Date: |
Wed, 17 Oct 2007 13:28:19 +0200 |
Hi,
I used gzip to compress a database backup file.
Afterwards gzip -l says:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> gzip -l compressed_file.gz
compressed uncompressed ratio uncompressed_name
869130362 411041792 -111.4% compressed_file
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
which is nonsense.
The real uncompressed size is:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> gzip -c -d compressed_file.gz | wc -c
4706009088
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I use the following gzip release on Windows XP professional:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> gzip -V
gzip 1.3.12
Copyright (C) 2007 Free Software Foundation, Inc.
Copyright (C) 1993 Jean-loup Gailly.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Jean-loup Gailly.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Best regards
Christian
________________________________
Christian Knappke
Senior Support Consultant
Active Global Support - Technology
SAP AG
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- gzip -l does not deal correctly with large files,
Knappke, Christian <=