[Gllug] unzip - slightly off topic

[Dylan]

PKzip is likely to suffer from file pointer restrictions inherent in 16bit 
DOS archetecture. WinZip (www.winzip.com) should cope with this. Although I 
haven't had a constant zip/unzip cycle on a fileset, I have used zip files up 
to about 4G containing hundreds of files of various sizes and types totalling 
maybe 6G uncompressed. Enouch space must be available either in the 
destination folder or temp to generate intermediate files - this is 
configurable with WinZip. Also, if you are incrementally writing to a 
zipfile, there must be enough space available for the zipfile to be 
duplicated, as the new file is generated then the old one is deleted.

On Thursday 23 August 2001 09:43, you wrote:
> Are there any known issues when unzipping very large files?
>
> We've get a nightly .zip file of about 0.25GB containing about 1.3GB of
> data in about 20 separate files.
> This should automatically unzip overnight, but fails occasionally and
> unpredictably.
>
> It's running on WinNT using PKzip at the moment :( but there were
> similar problems when it used to run on some Unix using gzip.
>
> How do the other compression utilities (bzip, bzip2, etc.) compare when
> unzipping large files?
> Or is the problem likely to be with the operating system (disk space,
> memory, etc) and not the compression utility used?
>
> Are there any websites discussing this issue?
>
> --
> Paul Brazier
> Cosmos UK
>
>
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