memcached failover

[Peter Schober]

* Marvin Addison <marvin.addison at gmail.com> [2016-08-03 12:53]:
> If you have somehow enabled memcached replication, then I can't speak to
> the behavior since I have no experience with that mode of operation.

Jfyi, note that SimpleSAMLphp implemements session distribution and
replication "among several memcache servers, enabling both
load-balancing and fail-over" in the application layer, and has done
so for many years:
https://simplesamlphp.org/docs/stable/simplesamlphp-maintenance#section_2
Maybe that approach isn't difficult to implement or deploy and works
with standad-alone vanilla memcached, without relying on repcache.
-peter