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Posted to users@httpd.apache.org by David Dabbs <dm...@gmail.com> on 2011/02/04 00:42:36 UTC
[users@httpd] Event MPM in httpd 2.2.x
Hello.
I'm considering changing over to the event MPM, but as of 2.1.17 it is still
marked with an "Experimental" warning in the MPM docs.
Does anyone know why the experimental warning was dropped in the 2.3 (trunk)
documentation?
Was it somehow stabilized/made ready-for-primetime?
If you're using a 2.2.x event MPM in a production environment, would you
mind reporting your experiences with it?
Thank you,
David
RE: [users@httpd] Event MPM in httpd 2.2.x
Posted by "Plüm, Rüdiger, VF-Group" <ru...@vodafone.com>.
> -----Original Message-----
> From: David Dabbs
> Sent: Freitag, 4. Februar 2011 17:23
> To: users@httpd.apache.org
> Cc: dev@httpd.apache.org
> Subject: RE: [users@httpd] Event MPM in httpd 2.2.x
>
>
> Thank you Tom for sharing your event MPM experience.
> Can anyone speak to whether 2.2.17 event MPM (safely) supports SSL?
> I suspect not, as only recently there was a trunk (2.3) fix
> to make the SSL expression parser thread-safe.
I guess this only matter for SSLRequire configurations and affects
event and worker MPM alike. So worker is IMHO not better than event with respect
to this.
Regards
Rüdiger
RE: [users@httpd] Event MPM in httpd 2.2.x
Posted by David Dabbs <dm...@gmail.com>.
> -----Original Message-----
> From: William A. Rowe Jr.
> Sent: Friday, February 04, 2011 12:50 PM
>
> On 2/4/2011 10:23 AM, David Dabbs wrote:
> >
> > Thank you Tom for sharing your event MPM experience.
> > Can anyone speak to whether 2.2.17 event MPM (safely) supports SSL?
> > I suspect not, as only recently there was a trunk (2.3) fix to make
> the SSL expression parser thread-safe.
> > Though this may be unrelated. If there's any doubts, we'll simply
> continuing using worker, or follow your lead and use a separate httpd
> for SSL connections.
>
> The expression parser isn't thread safe, but that doesn't affect you
> until you start nesting SSLRequire statements into your .htaccess
> files, and this was a problem on worker mpm as well.
>
So, with 2.2.17 one can safely use a single event MPM httpd that services SSL and non-SSL traffic alike?
David
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Re: [users@httpd] Event MPM in httpd 2.2.x
Posted by "William A. Rowe Jr." <wr...@rowe-clan.net>.
On 2/4/2011 10:23 AM, David Dabbs wrote:
>
> Thank you Tom for sharing your event MPM experience.
> Can anyone speak to whether 2.2.17 event MPM (safely) supports SSL?
> I suspect not, as only recently there was a trunk (2.3) fix to make the SSL expression parser thread-safe.
> Though this may be unrelated. If there's any doubts, we'll simply continuing using worker, or follow your lead and use a separate httpd for SSL connections.
The expression parser isn't thread safe, but that doesn't affect you until
you start nesting SSLRequire statements into your .htaccess files, and this
was a problem on worker mpm as well.
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RE: [users@httpd] Event MPM in httpd 2.2.x
Posted by David Dabbs <dm...@gmail.com>.
Thank you Tom for sharing your event MPM experience.
Can anyone speak to whether 2.2.17 event MPM (safely) supports SSL?
I suspect not, as only recently there was a trunk (2.3) fix to make the SSL expression parser thread-safe.
Though this may be unrelated. If there's any doubts, we'll simply continuing using worker, or follow your lead and use a separate httpd for SSL connections.
Best,
David
-----Original Message-----
From: Tom Evans
On Thu, Feb 3, 2011 at 11:42 PM, David Dabbs <dm...@gmail.com> wrote:
> Hello.
>
> I’m considering changing over to the event MPM, but as of 2.1.17 it is still
> marked with an “Experimental” warning in the MPM docs.
>
> Does anyone know why the experimental warning was dropped in the 2.3 (trunk)
> documentation?
> Was it somehow stabilized/made ready-for-primetime?
>
As it was explained to me 4 years ago, when we first moved to using
2.2 with event MPM, it was marked experimental at that time was only
because it could not handle SSL at all. In the trunk branch, this was
fixed so it would fall back to worker-style MPM when dealing with SSL
connections, and I think this has been backported to 2.2, although I'm
not sure, we still offload SSL to a different apache.
>
> If you’re using a 2.2.x event MPM in a production environment, would you
> mind reporting your experiences with it?
>
In a word - 'excellent'. We use apache-event as the front-end to all
our web apps, and it mainly serves static files or proxies to the
appropriate backend servers. Our sites aren't super-busy, 1-2 million
hits a day, but with event we have consistently fast connection and
throughput times, the load on the servers barely registers. We've
never had a problem with reliability or speed in the 4 years we've
been running event MPM on our front end proxies.
Cheers
Tom
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RE: [users@httpd] Event MPM in httpd 2.2.x
Posted by David Dabbs <dm...@gmail.com>.
Thank you Tom for sharing your event MPM experience.
Can anyone speak to whether 2.2.17 event MPM (safely) supports SSL?
I suspect not, as only recently there was a trunk (2.3) fix to make the SSL expression parser thread-safe.
Though this may be unrelated. If there's any doubts, we'll simply continuing using worker, or follow your lead and use a separate httpd for SSL connections.
Best,
David
-----Original Message-----
From: Tom Evans
On Thu, Feb 3, 2011 at 11:42 PM, David Dabbs <dm...@gmail.com> wrote:
> Hello.
>
> I’m considering changing over to the event MPM, but as of 2.1.17 it is still
> marked with an “Experimental” warning in the MPM docs.
>
> Does anyone know why the experimental warning was dropped in the 2.3 (trunk)
> documentation?
> Was it somehow stabilized/made ready-for-primetime?
>
As it was explained to me 4 years ago, when we first moved to using
2.2 with event MPM, it was marked experimental at that time was only
because it could not handle SSL at all. In the trunk branch, this was
fixed so it would fall back to worker-style MPM when dealing with SSL
connections, and I think this has been backported to 2.2, although I'm
not sure, we still offload SSL to a different apache.
>
> If you’re using a 2.2.x event MPM in a production environment, would you
> mind reporting your experiences with it?
>
In a word - 'excellent'. We use apache-event as the front-end to all
our web apps, and it mainly serves static files or proxies to the
appropriate backend servers. Our sites aren't super-busy, 1-2 million
hits a day, but with event we have consistently fast connection and
throughput times, the load on the servers barely registers. We've
never had a problem with reliability or speed in the 4 years we've
been running event MPM on our front end proxies.
Cheers
Tom
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Re: [users@httpd] Event MPM in httpd 2.2.x
Posted by Tom Evans <te...@googlemail.com>.
On Thu, Feb 3, 2011 at 11:42 PM, David Dabbs <dm...@gmail.com> wrote:
> Hello.
>
> I’m considering changing over to the event MPM, but as of 2.1.17 it is still
> marked with an “Experimental” warning in the MPM docs.
>
> Does anyone know why the experimental warning was dropped in the 2.3 (trunk)
> documentation?
> Was it somehow stabilized/made ready-for-primetime?
>
As it was explained to me 4 years ago, when we first moved to using
2.2 with event MPM, it was marked experimental at that time was only
because it could not handle SSL at all. In the trunk branch, this was
fixed so it would fall back to worker-style MPM when dealing with SSL
connections, and I think this has been backported to 2.2, although I'm
not sure, we still offload SSL to a different apache.
>
> If you’re using a 2.2.x event MPM in a production environment, would you
> mind reporting your experiences with it?
>
In a word - 'excellent'. We use apache-event as the front-end to all
our web apps, and it mainly serves static files or proxies to the
appropriate backend servers. Our sites aren't super-busy, 1-2 million
hits a day, but with event we have consistently fast connection and
throughput times, the load on the servers barely registers. We've
never had a problem with reliability or speed in the 4 years we've
been running event MPM on our front end proxies.
Cheers
Tom
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