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Posted to dev@perl.apache.org by Matt Sergeant <ma...@sergeant.org> on 2005/06/20 23:36:07 UTC
Scoreboard plans?
I see in the docs there's a stub to return $c->sbh - a scoreboard
handle. Are there any plans to implement this any time soon?
Reason I ask is that apache.org has now switched it's mail to using
Apache::Qpsmtpd - yes that's right - a mail server built on mod_perl
2.0 - you guys should be proud of yourselves as it was very easy to
create.
However the scoreboard doesn't seem to work right with protocol
handlers. The remote_ip isn't filled in, despite clearly being
available to the smtp code, and there's stuff I'd like to add in there,
like setting the request entry to contain the currently in-process SMTP
verb (i.e. MAIL FROM or DATA or whatever).
You can see what I mean at http://mail.apache.org/server-status
Matt.
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Re: Scoreboard plans?
Posted by Malcolm J Harwood <mj...@liminalflux.net>.
On Tuesday 21 June 2005 04:19 pm, Matt Sergeant wrote:
> > I'm not sure if it makes sense to have it in Apache2::Connection, as the
> > WorkerScore is process/thread based rather than connection based. (It
> > does have connection specific information in it, but it also has more long
> > lived data).
> I'm guessing it's there because that's where it's stored in the Apache
> internals. My suspicion (without digging) is that the scoreboard-worker
> (i.e. a line in the scoreboard) lives with a connection, and when that
> connection goes on to process another request it gets updated
> appropriately.
The whole thing is a shared memory block. The worker lives with a
process/thread. The scoreboard has many processes, each process has one or
more workers depending on whether you are running threads or not.
The worker stores some things that are process/thread specific (eg. bytes
served since this process/thread was started), some that are connection
specific (eg. number of requests served) and some that are request specific
(eg. name of the request).
So the worker is this odd amalgam of data with different scopes.
To my mind, any accessors therefor belongs more in Apache::Scoreboard than in
Apache2::Connection. Having Apache::Scoreboard provide a "current_worker()"
function would make sense though.
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Re: Scoreboard plans?
Posted by Matt Sergeant <ma...@sergeant.org>.
On 21 Jun 2005, at 14:56, Malcolm J Harwood wrote:
> I'm not sure if it makes sense to have it in Apache2::Connection, as
> the
> WorkerScore is process/thread based rather than connection based. (It
> does
> have connection specific information in it, but it also has more long
> lived
> data).
I'm guessing it's there because that's where it's stored in the Apache
internals. My suspicion (without digging) is that the scoreboard-worker
(i.e. a line in the scoreboard) lives with a connection, and when that
connection goes on to process another request it gets updated
appropriately.
Matt.
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Re: Scoreboard plans?
Posted by Malcolm J Harwood <mj...@liminalflux.net>.
On Tuesday 21 June 2005 02:28 pm, Matt Sergeant wrote:
> >> I see in the docs there's a stub to return $c->sbh - a scoreboard
> >> handle. Are there any plans to implement this any time soon?
> > Which docs?
> Apache2::Connection - right at the end.
Hrm. I don't know anything about it. Stas might (but he's off travelling the
world at the moment).
> > The update to Apache::Scoreboard should go out later this week (RCs
> > available if you'd like to test).
> I assume it's no different - I already got it to work with a few simple
> changes.
There's a few non-rename related fixes, but otherwise no, it's not a big
change. (Though moving it to the Apache2 namespace might make sense at this
point).
> >> However the entire API is read-only. Is there any way to write the
> >> scoreboard?
> > I don't see why it wouldn't be possible. It's just not exposed through
> > the current Apache::Scoreboard API, as no one seems to have ever needed
> > it. If you want to submit a patch to Apache::Scoreboard feel free. :) I'm
> > not sure what the best approach to providing a writable API would be here.
> I'm guessing just make the getters also setters. Plus it'd have to be
> extended to be able to provide the current ScoreboardWorkerScore. I'm
> wondering if that's the same as $c->sbh.
I'm not sure if it makes sense to have it in Apache2::Connection, as the
WorkerScore is process/thread based rather than connection based. (It does
have connection specific information in it, but it also has more long lived
data).
It should be relatively easy to add such to Apache::Scoreboard though.
--
"How wonderful it is that nobody need wait a single moment to
improve the world."
- Anne Frank, Diary of a Young Girl
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Re: Scoreboard plans?
Posted by Matt Sergeant <ma...@sergeant.org>.
On 21 Jun 2005, at 11:43, Malcolm J Harwood wrote:
> On Monday 20 June 2005 05:36 pm, Matt Sergeant wrote:
>
>> I see in the docs there's a stub to return $c->sbh - a scoreboard
>> handle. Are there any plans to implement this any time soon?
>
> Which docs?
Apache2::Connection - right at the end.
>> OK, so answering my own question - looks like Apache::Scoreboard
>> already works on mod-perl2, modulo a bunch of patches to bring it up
>> to
>> date wrt the Apache2 rename.
>
> The update to Apache::Scoreboard should go out later this week (RCs
> available
> if you'd like to test).
I assume it's no different - I already got it to work with a few simple
changes.
>> However the entire API is read-only. Is there any way to write the
>> scoreboard?
>
> I don't see why it wouldn't be possible. It's just not exposed through
> the
> current Apache::Scoreboard API, as no one seems to have ever needed
> it. If
> you want to submit a patch to Apache::Scoreboard feel free. :) I'm not
> sure
> what the best approach to providing a writable API would be here.
I'm guessing just make the getters also setters. Plus it'd have to be
extended to be able to provide the current ScoreboardWorkerScore. I'm
wondering if that's the same as $c->sbh.
Matt.
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Re: Scoreboard plans?
Posted by Malcolm J Harwood <mj...@liminalflux.net>.
On Monday 20 June 2005 05:36 pm, Matt Sergeant wrote:
> I see in the docs there's a stub to return $c->sbh - a scoreboard
> handle. Are there any plans to implement this any time soon?
Which docs?
> Reason I ask is that apache.org has now switched it's mail to using
> Apache::Qpsmtpd - yes that's right - a mail server built on mod_perl
> 2.0 - you guys should be proud of yourselves as it was very easy to
> create.
>
> However the scoreboard doesn't seem to work right with protocol
> handlers. The remote_ip isn't filled in, despite clearly being
> available to the smtp code,
That particular case sounds like an apache-side problem rather than a mod_perl
one. I don't know enough apache guts yet though, and even less about protocol
handlers.
> and there's stuff I'd like to add in there,
> like setting the request entry to contain the currently in-process SMTP
> verb (i.e. MAIL FROM or DATA or whatever).
On Monday 20 June 2005 06:05 pm, Matt Sergeant wrote:
> OK, so answering my own question - looks like Apache::Scoreboard
> already works on mod-perl2, modulo a bunch of patches to bring it up to
> date wrt the Apache2 rename.
The update to Apache::Scoreboard should go out later this week (RCs available
if you'd like to test).
> However the entire API is read-only. Is there any way to write the
> scoreboard?
I don't see why it wouldn't be possible. It's just not exposed through the
current Apache::Scoreboard API, as no one seems to have ever needed it. If
you want to submit a patch to Apache::Scoreboard feel free. :) I'm not sure
what the best approach to providing a writable API would be here.
--
Anywhere is walking distance, if you've got the time.
- Steven Wright
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Re: Scoreboard plans?
Posted by Matt Sergeant <ma...@sergeant.org>.
On 20 Jun 2005, at 17:36, Matt Sergeant wrote:
> I see in the docs there's a stub to return $c->sbh - a scoreboard
> handle. Are there any plans to implement this any time soon?
OK, so answering my own question - looks like Apache::Scoreboard
already works on mod-perl2, modulo a bunch of patches to bring it up to
date wrt the Apache2 rename.
However the entire API is read-only. Is there any way to write the
scoreboard?
Matt.
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