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:zz: The !@#$% forking data: General solution impossible?
- To: Andrew Pam <xanni@xxxxxxxxxxxxxxxxx>, zzdev@xxxxxxxxxx
- Subject: :zz: The !@#$% forking data: General solution impossible?
- From: Ted Nelson <ted@xxxxxxxxxx>
- Date: Fri, 02 Apr 1999 23:10:20 +0900
- Cc: ted@xxxxxxxxxxxxxx
- In-reply-to: <19990402094635.A520@xxxxxxxxxxxxxxxxx>
- References: <188.8.131.52.19990402080942.0099a100@xxxxxxxxxxxxxxxxxxx> <184.108.40.206.19990331143342.0092e8c0@xxxxxxxxxxxxxxxxxxx> <220.127.116.11.19990331005450.007ffa90@xxxxxxxxxxxxxxxxxxx> <18.104.22.168.19990331005450.007ffa90@xxxxxxxxxxxxxxxxxxx> <19990331024514.H9852@xxxxxxxxxxxxxxxxx> <22.214.171.124.19990331143342.0092e8c0@xxxxxxxxxxxxxxxxxxx> <19990331164928.B10875@xxxxxxxxxxxxxxxxx> <126.96.36.199.19990402080942.0099a100@xxxxxxxxxxxxxxxxxxx>
- Reply-to: zzdev@xxxxxxxxxx
The other alternative I could see would be to isolate
what was needed: specifying some subset of data
that the forked processs would be working from,
and zip its results back in later.
This is, however, sadly context-specific. Something
really need and general would be nice.
But that may not be possible: the results of parallel
processes ripping through the fabric of cells in
idiosyncratic ways could be ever so destructive.
I think this means we have to figure what sub-methods
can be handled by what means.
At 09:46 AM 4/2/99 +1000, you wrote:
>On Fri, Apr 02, 1999 at 08:09:42AM +0900, Ted Nelson wrote:
>> I accept that you propose that
>> >The simplest solution is to serialise the back-end by using a
>> >architecture, such as OSMIC.
>> but that doesn't sound simple to me, it sounds like
>> a HUGE step.
>Not really. It's pretty straightforward. It just sounds impressive.
>The alternatives are to use locking, or to just copy all the data with
>every fork (discussed below, and the least useful alternative).
>> What does it take
>> 1) to give a new filehandle to the forked process?
>Open a new file in each forked process so they're working from different
>> 2) to copy off the dataset?
>Just close the data set and ask the operating system to copy the file
>it lives in before doing the fork. Of course, you have to decide on
>the new file names, and it will be slow and really eat disk space.
> *** Xanni ***
>mailto:xanni@xxxxxxxxxx Andrew Pam
>http://www.xanadu.com.au/ Chief Scientist, Xanadu
>http://www.glasswings.com.au/ Technical Editor, Glass Wings
>http://www.sericyb.com.au/sc/ Manager, Serious Cybernetics
>P.O. Box 26, East Melbourne VIC 8002 Australia Phone +61 3 96511511
Theodor Holm Nelson, Visiting Professor of Environmental Information
Keio University, Shonan Fujisawa Campus, Fujisawa, Japan
Home Fax from USA: 011-81-466-46-7368 (If in Japan, 0466-46-7368)
http://www.sfc.keio.ac.jp/~ted/ (Professorial page)
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