[mapserver-users] Re: Reloading MapCache configuration file on changes?

[Pavel Iacovlev]

Thank you for the sudo rule suggestion and for detailed explanation!

Just one more question, if I use MapCache as fcgi, does this mean that on
every request the configuration will be read and parsed ? or the
configuration will be kept in memory until a the fastcgi process killed
and respawned ?

On Wed, Feb 22, 2012 at 12:37 PM, thomas bonfort <tbonfort at terriscope.fr>wrote:

> On Wed, Feb 22, 2012 at 11:22, Pavel Iacovlev <iacovlev.pavel at gmail.com>
> wrote:
> > apache2ctl -k graceful is not really an option for me because I would
> have
> > to give root privileges to my apache/php.
> you can create a sudo rule that only allows a user to run apache2ctl
> -k graceful without giving full root access.
>
> >
> > "AFAIK, this isn't possible." I don't know anything about apache modules
> and
> > stuff so the next thing I say may not be applicable or just plain stupid,
> > but maybe each process will hold their own copy of configuration so the
> > apache process will be able to alter it's configuration upon detection of
> > file change. There is certainly that added overhead of "checking last
> > modified date" and keeping more copies in memory, but this should not be
> the
> > default behavior.
>
> afaik, at the request level (which is were the freshness test would
> occur), there's no way of freeing the memory that allocated the
> initial configuration, and no way of allocating memory for the new
> configuration that would live across the upcoming requests.
>
> >
> > On Tue, Dec 6, 2011 at 1:00 PM, thomas bonfort <tbonfort at terriscope.fr>
> > wrote:
> >>
> >> AFAIK, this isn't possible. Inside an apache module, the configuration
> >> is considered read-only as it is shared between multiple worker
> >> threads/processed spawned by httpd.
> >>
> >> apachectl configtest && apachectl graceful will restart the server
> >> gracefully, i.e. without aborting ongoing requests, and will load the
> >> new configuration for subsequent requests.
> >>
> >> --
> >> thomas
> >>
> >> On Mon, Dec 5, 2011 at 23:37, John Taranu
> >> <jtaranu at firstbasesolutions.com> wrote:
> >> > Thomas,
> >> >
> >> >
> >> >
> >> > Is there a better way force MapCache to reload its configuration
> script
> >> > than
> >> > restarting apache?  I’m working on an application that will use two
> >> > load-balanced web servers running MapCache, all pointing to a single
> >> > central
> >> > tile repository and a single central .xml configuration file.  The
> >> > configuration file will occasionally be edited, either with deletions
> or
> >> > additional tilesets.  Both web servers need to reload the updated
> >> > configuration .xml.
> >> >
> >> >
> >> >
> >> > Is it possible to set up MapCache to check if the config file was
> >> > recently
> >> > updated and, if so, reload the config .xml?  It looks like this is
> >> > currently
> >> > enabled under FastCGI, but not under Apache.
> >> >
> >> >
> >> >
> >> > John
> >> _______________________________________________
> >> mapserver-users mailing list
> >> mapserver-users at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/mapserver-users
> >
> >
>
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