On Wed, 10 Feb 2010, Sam Sharpe wrote:
> On 9 February 2010 22:17, Robert P. J. Day <rpjday@xxxxxxxxxxxxxx> wrote:
> > "Finally we need to get the Memcached extension for PHP installed.
> > Again using yum:
> > yum install php-pecl-memcache"
> >
> > we *need* to get that extension for PHP installed? really? but
> > if it's necessary, why is it not listed as a dependency for
> > memcached? what if i *don't* install it? how does memcached work
> > *then*?
> >
> > just curious about that lack of dependency.
>
> Memcache can cache lots of things in lots of ways, not just PHP. If
> you want to cache via Memcache using PHP (which is what that article
> is about) then you need php-pecl-memcache.
>
> For example, lets say I have a big beefy MySQL serving machine with
> oodles of spare memory. I also have 4 webservers. I want to use a
> centralised memcache installation on the DB server, but I'm going to
> access the objects from the webservers.
>
> In this case, the DB server needs only memcached and the webservers
> need only php-pecl-memcache - neither is a direct dependency on the
> other.
>
> Make sense?
ironically, that's exactly the situation i'm looking at here -- one
system acting as a webserver, the other as a mysql db server. both of
them currently have *both* packages installed (memcached and
php-pecl-memcache) which, if i read you correctly, is slightly
overkill, and i could remove memcached from the webserver and the php
package from the db server. is that about right?
of course, if a single system was acting as both web and db server,
it would need both.
rday
--
========================================================================
Robert P. J. Day Waterloo, Ontario, CANADA
Linux Consulting, Training and Kernel Pedantry.
Web page: http://crashcourse.ca
Twitter: http://twitter.com/rpjday
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