Hi Alex,
is it fine to have two/many *independent* processes using the same
database?
The processes do not share a common parent process, so I just want to
check that there is NOT any important communication going on between
parent and child processes (something like synchronization
signals/messa
Hi Tomas,
> is it fine to have two/many *independent* processes using the same
> database?
Usually not, though I do it in certain cases.
On the lowest level, the db consists of independent objects ("external
symbols"). When a process accesses such a symbol, it obtains a read-lock
on the db, read
Hi Alex,
> Usually not, though I do it in certain cases.
In what cases and how you do it?
I want to split my app into two independent processes (process
families): an admin part (quite complex, can change a lot and
significantly, can stop quite "often" for upgrades etc.) and public
part (quite s
Hi Tomas,
> In what cases and how you do it?
At SmApper we had a set of stand-alone shell tools (i.e. with the first
line containing '#!bin/picolisp') that were used to do quick scans of
some databases and build reports. They simply loaded the "er.l" of those
applications, and called 'pool' on th
Hi Alex,
> The SmApper system also has an application manager, and tens to
> hundreds of interconnected database applications on blade clusters.
that sounds impressive, what does it actually mean? Just curious, is
that all picolisp processes spread over many machines managing many
databases all
Hi Tomas,
> that all picolisp processes spread over many machines managing many
> databases all communicating (interconnected, in what sence?) to solve
> one (or many "unrelated") business problem? I looked at SmApper
> website and it seems quite a secret technology;-)
Well, then I cannot tell t
On Fri, Nov 28, 2008 at 01:15:46PM +0100, Alexander Burger wrote:
> If you go with a common database, I would do it like this: The parent
> process only loads "lib/http.l" and a common "er.l", defines a function
Another great advantage of this solution is that you don't even have to
stop any of th
Hi Alex,
> What I'd like to know first: Is it necessary here that they both
> share a common database, or would it also be conceivable that each
> has its own database, and they just exchange information?
yes, I managed to "export" data from the admin part (at suitable
times) for the 24/7 part so
Hi Tomas,
> > They exist since picoLisp-2.3.3. Is there no "doc/refE.html#*Ext"?
>
> I cannot find it even in picoLisp-2.3.3 or the testing version:-(
Well, then I'm rather worried. Something must be really wrong with the
distribution mechanism ;-)
If you look at line 31 of "doc/refE.html" (in
Hi Alex,
> Well, then I'm rather worried. Something must be really wrong with
> the distribution mechanism ;-)
found it. I am sorry, something seriously wrong with me:-(
Cheers,
Tomas
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