[Mageia-dev] Freeze Push: memcached

Mon May 7 12:15:34 CEST 2012

Hi,
+
+Please push memcached.
+
+This is just for a subtle but significant change to the systemd units
+after discussions upstream.
+
+When dealing with large numbers of templated units, it's often difficult
+to keep them all in sync. e.g. I might have 10 instances of the memcache
+service and want to restart them all. The previous structure was
+difficult in that regard.
+
+This new structure introduces a new memcached.target. Each of the
+templated units are set as BindTo=memcached.target which means that they
+will follow the start/stop status of the target.
+
+The target installs itself as a wants for multi-user.target and each
+individual unit install themselves as being wanted by memcached.target.
+
+This has the net result that starting/stopping/restarting all memcache
+servers is as easy as "systemctl start|stop|restart memcached.target"
+
+The only slightly ugly thing is that current rpm-helper code will
+restart all instantiated instances of template units and then restart
+the target too. This has the effect of doing the restart twice, but I
+think this is a small price to pay.
+
+I use the myself as I run two memcache servers for my work environment
+and I can imaging scaling this up to any significant number would result
+in significant benefits.
+
+FWIW, this is how openvpn should be structured too IMO.
+
+Col
+
+-- 
+
+Colin Guthrie
+colin(at)mageia.org
+http://colin.guthr.ie/
+
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+