On 5/20/08, André Warnier <[EMAIL PROTECTED]> wrote: > > > william wrote: > > > On 5/20/08, william <[EMAIL PROTECTED]> wrote: > > > > > Hello, I just know that I can't have a startup script, but how can I > > > create an object in the startup script and then used that variable > > > object in child modperl script ? Thanks. > > > > > > > > > > Sorry I mean I CAN have a startup script. > > > > > > Hi. > > Take this as a not really qualified answer, but until one of the gurus here > jumps in, it may be a start. > > The simple question you are asking above is in fact very complicated. > If the idea of your question is to create some variable once at the server > start, and then be able to share that variable through multiple invocations > of a script or module, then you will probably not be able to do that, or at > least not in a simple way. > The first thing that happens, is that there are multiple Apache children > processes started and running at the same time, and that you never know > which one is going to execute your script. And each one of these children > processes, will have its own independent copy (or instance) of your "common" > variable (or object). So the variable will not really be common. > > There are some ways around that, involving shared memory. But it is > probably anyway more complicated that what your simple question above seems > to indicate of what you expect. > > Let me make a prediction : I can see a quite long and interesting thread > starting here.. > > André > >
Thanks for the prompt reply, you said that every child process have a copy of the common object variable. I think that shouldn't be a problem in my case, because it's an object that only gives data, in contrast we would not modify anything about the object. Specifically, I want to achieve this because the problem of this module WordNet::QueryData http://search.cpan.org/~jrennie/WordNet-QueryData-1.47/QueryData.pm . This initialization step is slow (appx. 10-15 seconds), but queries are very fast thereafter---thousands of queries can be completed every second. In my hardware it only takes 2 seconds, but that still quite a lot of time to wait if every child process need to take 2 seconds. Unless I can have a permanent in startup script and used by the child process. Thanks
