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- DUPLICATE CHECKING
-
- This bbs uses ZDCS (Zipfile Duplicate Checking System) to check the
- files in your upload against those already here on the bbs to see if
- there are any duplicates. This benefits us by wasting less storage
- space on keeping multiple copies of the same files, and benefits you
- by reducing the frustration of downloading files with different names
- that turn out to be the same files after all.
-
- When you upload your file, ZDCS will check it and tell you whether or
- not there are any duplicate files inside your upload. If there are
- more duplicates than this bbs allows, the upload will be moved to a
- private area for the sysop's review. It is not dumped!
-
- You can "pre-test" an upload before actually spending your time on-
- line to send it. This does not require you to download any special
- programs or to perform any arcane rituals. The pre-test will give you
- the same sort of information that ZDCS gives to a finished upload, so
- you can see how your intended upload would compare with the files
- already on the bbs. Sound too good to be true? It's really pretty
- simple. All you need is PKZIP. You *do* have PKZIP, right?
-
- Let's say that you want to upload a zipfile called GOODSTUF.ZIP. At
- your DOS prompt, type in the following (not case-sensitive) command:
-
- PKZIP -V GOODSTUF.ZIP > ZDCSTEST.CHK
-
- A new file called ZDCSTEST.CHK has just been created with information
- about GOODSTUF.ZIP in it. All you have to do is upload ZDCSTEST.CHK
- to the bbs, and it will give you a breakdown of all the individual
- files in GOODSTUF.ZIP, with a note as to whether any of them are
- duplicates or bbs ads. Now you know whether it's worth your time to
- upload GOODSTUF.ZIP to the board. (Sorry, no upload credits for
- ZDCSTEST.CHK.)
-
- Suppose you have more than one upload you want to check out. (First
- off, thank you for wanting to upload!) You'll have to issue the above
- command separately for each upload you want to check out, creating
- separate ZDCSTEST.CHK files. You can handle this one of two ways:
-
- 1. Do it ahead of time and use a different directory for each
- upload. This is to keep from overwriting the ZDCSTEST.CHK file
- for one upload with the .CHK file from another.
-
- 2. Shell out to DOS while on-line and do it live. (Each
- communications program does this a little differently, but pretty
- much any half-way decent comm program lets you pop out of the bbs
- and back to your own machine's DOS for little things like this.)
- Since the PKZIP -V command is so fast, you lose very little time.
- This is probably the simplest way to do it.
-
- On a multi-node system, there is a possibility that someone else is
- trying to upload her or his own ZDCSTEST.CHK test file at the same
- time as you. In that case, the bbs may tell you that your file is a
- dupe. Just count to ten slowly and try again. If you get the same
- message a second time, leave a <C>omment to the sysop. There is
- another possible reason for this dupe message, which the sysop can
- check out.
-
- Thanks for the uploads!
-
- .....................................................................
- ZDCS and Zipfile Duplicate Checking System
- (C) Copyright 1991 by Michael W. Cocke. All rights reserved.