map module - mass hosting

[beatnut]

Thank You for explanation and advise.


Maxim Dounin Wrote:
-------------------------------------------------------
> Hello!
> 
> On Wed, Apr 23, 2014 at 09:27:33AM -0400, beatnut wrote:
> 
> [...]
> 
> > > Searching within a map is basically identical to searching for 
> > > appropriate server{} block, both use the same internal mechanism 
> > > (ngx_hash).  As long as you don't use regular expressions,
> > > lookup complexity is O(1).
> > 
> > So using for example:
> > 
> > .example.com
> >  or
> > example.*
> > 
> > have more complexity or  it shoud have full list of subdomains for
> better
> > performance:
> > 
> > www.example.com
> > example.com
> > example.somedomain.com
> 
> While wildcards require more work on each lookup, complexity is 
> still O(1).  Note that regular expressions != wildcard names.
> 
> > > Distinct server{} blocks might be more CPU-efficient due to no
> need to
> > > 
> > > evaluate variables and dynamically allocate memory for resulting 
> > > strings on each request.
> > 
> > My configuration include one file with server{} per domain.
> > exaple.com.conf
> > example2.conf 
> > etc
> > 
> > The main improvement i'd like to implement is to have one file with
> php
> > config like   fastcgi.conf above and then include it in every
> server{} 
> > Map module gives me this opportunity. 
> 
> This is not something I would recommend to do.  If you have 
> server{} block per domain, you should have enough data to write 
> configuration without introducing another map ($document_root, 
> $server_name, and so on).
> 
> Please also see this FAQ article:
> 
> http://nginx.org/en/docs/faq/variables_in_config.html
> 
> -- 
> Maxim Dounin
> http://nginx.org/
> 
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Posted at Nginx Forum: http://forum.nginx.org/read.php?2,249475,249513#msg-249513