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<TITLE> [Mageia-dev] Freeze Push: memcached
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<H1>[Mageia-dev] Freeze Push: memcached</H1>
<B>Colin Guthrie</B>
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TITLE="[Mageia-dev] Freeze Push: memcached">mageia at colin.guthr.ie
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<I>Mon May 7 12:15:34 CEST 2012</I>
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<PRE>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
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Colin Guthrie
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