Two copies of Apache running on the same server...

I have a web environment that support both http and https on the same
machine. The machine is a powerful SParc 450 with a lot of memory and CPU
power. I am wondering if I can install copies of apache on the same
machine, one runs http, and another runs https. Will this improve the
server performance?

- Ming
- System Engineer
- APL
____________________________________________________________ __________
Apache Interface to OpenSSL (mod_ssl) www.modssl.org
User Support Mailing List modssl-users@modssl.org
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Re: Two copies of Apache running on the same server...

you can run as many instances of apache that your system can support so
long as no two instances listen on the same port - at least thats the
theory.
In practice, apache writes to various files such as the .pid file,
lockfiles, mutex lockfiles etc - and it can be difficult to make sure
the different instances dont run into each other. (and remembering this
each time you compile a new version).

On the other hand, it's just not necessary usually to run multiple
instances - one apache instance can server http and https on multiple
ports at the same time using VirtualHost stanzas.

You've probably noticed that apache pre-forks several copies of itself,
and its these children that handle connections in a parallel fashion and
go some way to taking advantage of multiple CPU's, but it's not the
absolute best possible - that would be if you were using solaris
threads. As it happens Apache 2 is multi-threaded, yet still supports
pre-forked children, so you can tune it up a lot better.

On the balance of things, I feel it would be harder to get good
performance out of a system if you used two separate apaches, than if
you worked on tuning it up with just one.

Yu, Ming wrote:

>I have a web environment that support both http and https on the same
>machine. The machine is a powerful SParc 450 with a lot of memory and CPU
>power. I am wondering if I can install copies of apache on the same
>machine, one runs http, and another runs https. Will this improve the
>server performance?
>
>- Ming
>- System Engineer
>- APL
>___________________________________________________________ ___________
>Apache Interface to OpenSSL (mod_ssl) www.modssl.org
>User Support Mailing List modssl-users@modssl.org
>Automated List Manager majordomo@modssl.org
>
>


____________________________________________________________ __________
Apache Interface to OpenSSL (mod_ssl) www.modssl.org
User Support Mailing List modssl-users@modssl.org
Automated List Manager majordomo@modssl.org