why not just start up 10 maximas; some implementations should allow
considerable sharing.
Then each time you get a request, find an idle maxima. If you have all
10 computing, you have
a problem any way you look at it. You could start up another one, or
just say that
you are busy, try again later.
I think that starting up another maxima, given that one is already in
memory,
takes a small fraction of a second, with the right lisp.
Another approach is to have a multiple-user server written in lisp
entirely, which would probably be
a much more flexible approach, but requires a more sophisticated
knowledge of lisp, and maybe
a better lisp than some people are using. Many people
resist this and prefer to use some other scripting language. Not
realizing that Lisp is quite appropriate
for scripting, access to operating system, etc. They then have to
communicate between lisp and something
else, and that can be clumsy.
I wrote an entire server for integration table lookup in lisp.
(TILU).
RJF
Gerd Kortemeyer wrote:
> Hi,
>
> How about a real "server mode" for Maxima, so its kernel can run as a
> daemon, and be used by other applications? This has to be truly
> scalable in high load situations and not start a new process every
> time. We fudged something for our LON-CAPA project, but it is
> basically behaving like terminal emulation, "typing" the expressions
> into the command line of a running Maxima:
>
> http://www.lon-capa.org/maximaasserver.html
>
> This works fine, but it is so ugly :-(
>
> They can write their daemon in Python or whatever they want, as long
> as it provides a standard port that other applications can connect to.
> Feel free to provide the above link in the Google Summer of Code
> application.
>
> - Gerd.
>
> On Mar 9, 2009, at 9:23 AM, R Fateman wrote:
>
>
>> Perhaps a project would be a proper python to maxima linkage, not
>> "pexpect" which William Stein of Sage claims is too slow, and
>> therefore
>> Maxima should be rewritten, piecemeal in python.
>>
>> If a proper linkage were possible, e.g. taking a lisp data structure
>> and
>> returning it to python or vice versa, instead of whatever is done,
>> would
>> that fix
>> everything?
>>
>> Or having python run inside the common lisp.
>>
>> I know nothing about pexpect.
>>
>> Google seems to like python and not lisp (so much).
>>
>> It would be cute to essentially replace Sage's fundamental mechanism
>> with something much better.
>>
>>
>> Here's another project: make the google calculator do symbolic math.
>> That is, instead of just 2*2= as a search string, allow x*x=
>>
>> Anything involving higher math is, I think, going to be less popular
>> than more "common" topics.
>> Anything using python seems to be favored somewhat.
>>
>> RJF
>>
>> _______________________________________________
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>> Maxima at math.utexas.edu
>> http://www.math.utexas.edu/mailman/listinfo/maxima
>>
>
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