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- Xref: sparky comp.databases:6599 bit.listserv.dbase-l:933
- Newsgroups: comp.databases,bit.listserv.dbase-l
- Path: sparky!uunet!pipex!warwick!mrccrc!ifenton
- From: ifenton@crc.ac.uk (I. Fenton)
- Subject: Re: Clipper: Backup/Restore routines for BIG files...
- Message-ID: <1992Sep2.102406.4210@crc.ac.uk>
- Sender: news@crc.ac.uk
- Nntp-Posting-Host: tin
- Organization: MRC Human Genome Resource Centre
- References: <1992Sep1.114959.11104@cs.tu-berlin.de>
- Date: Wed, 2 Sep 1992 10:24:06 GMT
- Lines: 27
-
- In article <1992Sep1.114959.11104@cs.tu-berlin.de> schli@cs.tu-berlin.de (Wolfram Schlickenrieder) writes:
- >
- > Hi there...
- >
- > I'm stuck: I wanted to write a backup & restore routine for an
- > application I wrote before, but I have got a few data bases
- > which are HUGE (2-4MB) and therefore won't fit on a single
- > disc. Has anyone out there done that before from within a
- > Clipper application (without using "run backup ..." of
- > course)?
- >
- > Any help is appreciated...
- >
- > ...Wolfram
-
- a number of points to make here. dbf files of 2-4 megs ain't HUGE. my
- main app has a dbf of 16 megs. the index (ntx) files add up to >1 meg.
- anyway, i tried splitting it under program code to a floppy(s) by using
- ascii delimited format. but this ended up as beig 10+ floppies. pain.
- so, now using the Overlay library to run a large DOS command. i then
- call a pd squashing program (pkzip etc.) to make the dbf small. this can
- make the file maybe 8 - 10 times smaller, as most dbf files are full of
- empty space. hope this helps.
-
- IAIN FENTON
- Inst of Medical Genetics, Cardiff, UK
-
-