Hello,
I have been working with this exact subject for the past couple weeks and
becnhmarking lots of results. Although I dont have the results here to
show, we have decided to use PVM (
http://www.epm.ornl.gov/pvm/pvm_home.html ) to spawn subprocces on other
machines and also on the same machine
On Thu, 5 Oct 2000, Sean D. Cook wrote:
> > On Wed, Oct 04, 2000 at 02:42:50PM -0700, David E. Wheeler wrote:
> > > Yeah, I was thinking something along these lines. Don't know if I need
> > > something as complex as IPC. I was thinking of perhaps a second Apache
> > > server set up just to han
I'm working with the Swish search engine (www.apache.org and the guide use
it).
Until this month, SWISH could only be called via a fork/exec. Now there's
an early C library for swish that I've built into a perl module for use
with mod_perl.
Yea! No forking!
I decided to do some quick benchmark
> On Wed, Oct 04, 2000 at 02:42:50PM -0700, David E. Wheeler wrote:
> > Yeah, I was thinking something along these lines. Don't know if I need
> > something as complex as IPC. I was thinking of perhaps a second Apache
> > server set up just to handle long-term processing. Then the first server
> >
David E. Wheeler writes:
> Using the cleanup phase, as Geoffey Young suggests, might be a bit
> nicer, but I'll have to look into how much time my processing will
> likely take, hogging up an apache fork while it finishes.
I've wondered about this as well. I really like the cleanup handler,
I use a database table for the queue. No file locking issues, atomic
transactions, you can sort and order the jobs, etc . . . you can wrap the
entire "queue" library in a module. Plus, the background script that
processes the queue can easily run with higher permissions, and you don't
have to wor
On Wed, Oct 04, 2000 at 02:42:50PM -0700, David E. Wheeler wrote:
> Yeah, I was thinking something along these lines. Don't know if I need
> something as complex as IPC. I was thinking of perhaps a second Apache
> server set up just to handle long-term processing. Then the first server
> could sen
Billy Donahue wrote:
> > Now you are faced with a trade off. Is it more expensive to
> > detach a subprocess, or use the child cleanup phase to do
> > some extra processing? I'd have to know more specifics to answer
> > that with any modicum of confidence.
>
> He might try a daemon coprocesses
ed phillips wrote:
>
> I hope it is clear that you don't want fork the whole server!
>
> Mod_cgi goes to great pains to effectively fork a subprocess, and
> was the major impetus I believe for the development of
> the C subprocess API. It (the source code for
> mod_cgi) is a great place to lear
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On Wed, 4 Oct 2000, ed phillips wrote:
> Now you are faced with a trade off. Is it more expensive to
> detach a subprocess, or use the child cleanup phase to do
> some extra processing? I'd have to know more specifics to answer
> that with any modic
I hope it is clear that you don't want fork the whole server!
Mod_cgi goes to great pains to effectively fork a subprocess, and
was the major impetus I believe for the development of
the C subprocess API. It (the source code for
mod_cgi) is a great place to learn some of the
subtleties as the Ea
ed phillips wrote:
>
> Hi David,
>
> Check out the guide at
>
> http://perl.apache.org/guide/performance.html#Forking_and_Executing_Subprocess
>
> The Eagle book also covers the C API subprocess details on page 622-631.
>
> Let us know if the guide is unclear to you, so we can improve it.
Ye
I was just going to post that url to the guide also... But another option
I've come up with not listed in the guide is to use the *nix "at" command.
If I need to run some processor intensive application that doesn't need
apache_anything, I'll do a system call to "at" to schedule it to run
(usual
Hi David,
Check out the guide at
http://perl.apache.org/guide/performance.html#Forking_and_Executing_Subprocess
The Eagle book also covers the C API subprocess details on page 622-631.
Let us know if the guide is unclear to you, so we can improve it.
Ed
"David E. Wheeler" wrote:
> Hi All,
> -Original Message-
> From: David E. Wheeler [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, October 04, 2000 3:44 PM
> To: [EMAIL PROTECTED]
> Subject: Forking in mod_perl?
>
>
> Hi All,
>
> Quick question - can I fork off a process in mod_perl? I've
> got a piece
> of code that need
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