ircmaxell’s blog: What About Garbage?

Cyclic Garbage Collection Enter something called a cyclic garbage collector.Basically, this is a function which will try to detect those circular references. We call it cyclic, because it’s generalized to not just handle circular references, but handle any kind of Cycle. So how does it work? Collecting Cycles I’m going to describe this backwards. I’m …

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MySQL Master-Master Replication, Heartbeat, DRBD, Apache, PHP, Varnish MegaHOWTO | IO Digital Sec

I created this HOWTO while building a new development environment today. The intention is to take a single Apache2/Varnish/MySQL environment and scale it to two servers, with one effectively a “hot-standby” – increase redundancy and continuity whilst maintaining current performance. This HOWTO is based on Linux Debian-76-wheezy-64-minimal 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u3 x86_64 via MySQL …

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