Originally posted by: ruxi002

Hi, we have an issue with gzip compression performance after exchange of all rpm packages from perzl with those from the AIX toolbox

We use BMC software with a backup script for the PostrgeSQL database in which the following command is used:

 

  tar cvf $HOME_DIR/pgsql | gzip -2 > $BACKUP_DIR/pgsql.tar.gz

 

=> the compression parameter is "2" and is set by the BMC script - so we should leave it as it is

 

Here a comparison of the gzip versions regarding run time:

Backup with gzip from perzl : 10:30 - 20:36
Analyzing (about 0,5 h)
backup with gzip : about 9,5h
Filesize archive900.tar.gz: 217.506.920.273 

 

Backup with gzip from AIX Toolbox : 23.6. 10:30 - 24.6. 11:42
Analyzing (about 0,5 h)
backup with gzip : about 24,5h
Filesize archive900.tar.gz: 218.022.288.665

 

=> Compressing the PostrgeSQL Dump (about 200GB) needs 2.5x more time and exceeds the backup window because a day has only 24 hours 

 

Version from perzl.org:

# rpm -qi gzip-1.5-1
Name        : gzip                         Relocations: (not relocateable)
Version     : 1.5                               Vendor: (none)
Release     : 1                             Build Date: Thu Apr  4 01:50:31 MSZ 2013
Install date: Tue Jun 28 17:42:04 MSZ 2016      Build Host: aix51.perzl.org
Group       : Applications/File             Source RPM: gzip-1.5-1.src.rpm
Size        : 299993                           License: GPLv3+ and GFDL
URL         : http://www.gzip.org/
Summary     : The GNU data compression program
Description :
The gzip package contains the popular GNU gzip data compression
program. Gzipped files have a .gz extension.

Gzip should be installed on your system, because it is a
very commonly used data compression program.

 

Version from AIX Toolbox:

# rpm -qi gzip-1.8-1.ppc
Name        : gzip
Version     : 1.8
Release     : 1
Architecture: ppc
Install Date: Fri May  4 08:52:29 MSZ 2018
Group       : Applications/File
Size        : 556318
License     : GPL
Signature   : (none)
Source RPM  : gzip-1.8-1.src.rpm
Build Date  : Thu Feb  8 12:32:50 MEZ 2018
Build Host  : pokndd5.pok.stglabs.ibm.com
Relocations : (not relocatable)
Summary     : The GNU data compression program.
Description :
The gzip package contains the popular GNU gzip data compression
program.  Gzipped files have a .gz extension.

Gzip should be installed on your Red Hat Linux system, because it is a      
very commonly used data compression program.

 

Maybe someone has a hint about those big differences? And maybe someone has made the same experiences and can confirm our observations?!

Optimization parameters shouldn't make such a difference, could they?!

 

Thanks in advance

Martin

Originally posted by: sanket

 

Hi Martin,

We will look into this. 

 

Originally posted by: sanket

Hi Martin,

 

First thanks for reporting the issue.

We found the reason for performance.

The gzip from toolbox was not compiled with optimisation hence it was not giving the expected performance.

We have tested newly built gzip and it is matching the performance. We will upload it soon on toolbox and update here.

Originally posted by: ruxi002

Hi,

 

Thanks in advance. 

 

Martin

Originally posted by: sanket

 

We have published fixed gzip with optimization. 

This should give you greater perfromance.

Please download the latest gzip from following location or use yum to update it.

https://public.dhe.ibm.com/aix/freeSoftware/aixtoolbox/RPMS/ppc/gzip/gzip-1.8-2.aix6.1.ppc.rpm

 

Thanks