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how to compress a file

 
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yadav2005
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Joined: 10 Jan 2005
Posts: 348
Topics: 144

PostPosted: Fri Oct 09, 2009 7:54 am    Post subject: how to compress a file Reply with quote

I have a file which is uncompressed format and I need to compress the file desiring to be VSAM , is there any utility or way to do this task. Can anybody help me with comressing files techniques and why we have the concepts of compressing and uncompressing.
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Anuj Dhawan
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Joined: 19 Jul 2007
Posts: 298
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Location: Mumbai,India

PostPosted: Fri Oct 09, 2009 8:58 am    Post subject: Reply with quote

I do not understand this
Quote:
desiring to be VSAM
from your description, however, GZIP, PKZIP can be your choices, I believe.
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Anuj
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Anuj Dhawan
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Joined: 19 Jul 2007
Posts: 298
Topics: 7
Location: Mumbai,India

PostPosted: Fri Oct 09, 2009 9:02 am    Post subject: Reply with quote

Advantages for compressing files include, as IBM says,
  • saving money and time by compressing files before sending them over a network.
  • Saving storage and archiving system resources.
  • Compress file systems before making backups to preserve tape space.
  • Compress log files created by shell scripts that run at night; it is easy to have the script compress the file before it exits.
  • Compress files that are not currently being accessed. For example, the files belonging to a user who is away for extended leave can be compressed and placed into a tar archive on disk or to a tape and later be restored

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kolusu
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Joined: 26 Nov 2002
Posts: 12358
Topics: 75
Location: San Jose

PostPosted: Fri Oct 09, 2009 10:05 am    Post subject: Reply with quote

yadav2005,

Search for "compression" in this book

http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DGT2D480/CCONTENTS?
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