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Simtel MSDOS 1992 June
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SIMTEL_0692.cdr
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COMMENT.ARY
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1989-06-18
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Commentary by Alex Janssen
NOTE: The following is probably political and opinionated
NEW SOFTWARE TECHNOLOGY ?
Apparently many people across the U.S. have begun using Phil
Katz's new file compression programs that use the ZIP file
extension. I had read and heard a lot about them, so I obtained
a copy from GENIE to find out what was so much better than
programs using the ARC file extension.
To my surprise there was one minor improvement and five major
improvements. The minor improvement was speed. Every developer
always improves this feature at some time or other. The major
improvements will provide much more user service than can be had
by previous programs of this nature. In no particular order they
are as follows.
A listing of the contents of a compressed file library
can now be had in order by File Name, File Size, File
Date, or File Compression Ratio. A very useful feature
for locating by name, the smallest or largest, or the
most recently updated files. Sorting the listing by
compression ratio is useful in optimizing your
compression techniques, but otherwise, I may not use it
very often. The capability to control the listing order
in itself may well be the most appreciated enhancement in
this new release.
Searching multiple compressed libraries with PKUNZIP from
one command line via use of DOS wild card conventions in
the specified ZIP file name is another, like the above
mentioned, very serviceable enhancement. This one will
save a lot of time for those of you maintaining many
compressed libraries.
Control over the compression method is limited but much
more is offered than other programs of this type. With
selection of the type of compression method either
automatic or manual, you can really put the squeeze on
your files with what is referred to as "extra compression
known as Reducing".
Multiple directories may be packed away in one compressed
file library with the full path name stored with each
file. When they are subsequently unpacked the
directories may be optionally restored with the
appropriate files in them. An excellent backup method or
to move an application from your fixed disk to floppies
temporarily to allow room for something else.
Soon, spanning multiple disks with one compressed library
file is to be possible. Is this to be a new backup
program for the "poor man"? I was disappointed that this
was not implemented in the current version. This reeks
of vaporware, but hopefully Phil Katz will come through
with this excellent sounding feature.
Better compression capability is more evident when you have a low
number of relatively large files to pack away as apposed to a
large number of small files. The extra header information stored
with each file in the new ZIP format is apparently the cause of
this larger resulting compressed file library. Users may tend to
overlook this seeming drawback when the other new features come
to mind. And you know, it is damn nice of Phil Katz to include
the file structure with the program documentation, for what it's
worth.
All of the above plus the un-mentioned added security and error
recovery features mentioned in the documentation add up to a much
better and safer to use set of file compression utilities than we
have had before. Phil Katz has produced a really excellent set
of file archiveal storage and retrieval programs.
SEA's ARC program was excellent in its time. Its time has passed
now. Every one should be moving up to the technological advances
made in the new ZIP format.
-Commentary by Alex Janssen
GENIE a.janssen1