Browse Prior Art Database

AIR TIME ACCUMULATOR FILE TRANSFER TECHNIQUES

IP.com Disclosure Number: IPCOM000006303D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2001-Dec-21
Document File: 2 page(s) / 90K

Publishing Venue

Motorola

Related People

Robert Lew: AUTHOR

Abstract

In many UNIX based systems there is a need to transfer data electronically from one location to another, a very useful tool included with most UNIX systems is UUCP (Unix to Unix Copy). UUCP allows a totally automated method of transfering data either through dialup lines or dedicated data networks.

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MOIOROLA INC. Technical Developments Volume 14 December 1991

AIR TIME ACCUMULATOR FILE TRANSFER TECHNIQUES

by Robert Lew

   In many UNIX based systems there is a need to transfer data electronically from one location to another, a very useful tool included with most UNIX systems is UUCP (Unix to Unix Copy). UUCP allows a totally automated method of transfering data either through dialup lines or dedicated data networks.

  Some of the requirements for a data transfer are data integrity, status of transfer, recovery from line errors and interruptions, contacting of the remote site, and polling management/scheduling of sites. All of these issues are taken care ofby UUCP

  In some cases it is desirable to offer addition fea- tares related to the management of the data to be sent. Some of these are minimizing the impact of loss of con- nection during a file transfer (by splitting up and compressing of larger liles into smaller tiles, to be reversed at the receiving end), and allowing additional requests for the retransfer of fdes which have been previously sent without keeping data files online constantly.

  A method to offer these additional features without affecting the operation of UUCP is presented here (refer to Figure 1.).

  Once the files to be transfered have been determined it is sent to a Preprocessor (bubble .5), within this bub- ble the file size is determined and if necessary the file is divided/compressed, the fde(s) is then placed into the

"PROCESSED DATA" buffer. Next the File process (bubble .4) will regulate the copying of subfiles from the "PROCESSED DATA" but&r to the "SEND QUEUE" buffer, also the File process...