http://munin-monitoring.org/wiki/rrdcachedhttp://munin.jp/wiki/rrdcachedhttps://www.tumfatig.net/20150731/enabling-rrdcached-for-munin-on-openbsd/http://pocketstudio.jp/log3/2013/07/31/bring_back_io_with_munin_and_rrdcached/https://github.…