[AccessD] Archiving files with Winzip Command Line version

It looks like your right. I just tested this by adding files to a large Zip
and observing the contents of the Winzip working directory (and my Temp
folder).

All that happens is a single file appears (called _Z121234 or such like) and
it grows to the size of the original Zip file then at the end of the append
process it is deleted. So it seems like Winzip does not unzip and then rezip
as I has assumed. Another demonstration of the old adage that " 'Assume'
makes and ass out of u and me". :-)

Lambert

> -----Original Message-----
> From:	accessd-bounces at databaseadvisors.com
> [SMTP:accessd-bounces at databaseadvisors.com] On Behalf Of Bobby Heid
> Sent:	Thursday, March 10, 2005 7:35 AM
> To:	'Access Developers discussion and problem solving'
> Subject:	RE: [AccessD] Archiving files with Winzip Command Line
> version
> 
> I was under the impression that it was faster to add.  When you add, it
> does
> not have to recompress the files that are already in the zip file.  I
> think
> that it does copy all of the existing data to a new file, adds the new
> data
> to the file then copies it back over the original.
> 
> Bobby
> 
> -----Original Message-----
> From: accessd-bounces at databaseadvisors.com
> [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Heenan, Lambert
> Sent: Wednesday, March 09, 2005 4:52 PM
> To: 'Access Developers discussion and problem solving'; 'Mcgillivray, Don
> [ITS]'
> Subject: RE: [AccessD] Archiving files with Winzip Command Line version
> 
> I believe that when you ask Winzip to 'add' files to an existing zip file
> is
> that it actually extracts all the existing files to a temporary folder,
> then
> it zips them all back up, including the additional files. That's when you
> see the 'Copying Zip File" message.  So you really don't have any
> performance hit to contend with if you do this manually.
> 
> Lambert
> 
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