6to4: Easing the IPv6 transition

With the exhaustion of IPv4 address space looming sometime in 2012; probably earlier rather than later, it makes sense to ease on into IPv6 land. ¬†Without straying into tunnel broking and endpoint shenanigans 6to4 is a method of wrapping up IPv6 inside of IPv4. 6to4 performs three functions: Allocates an IPv6 address block to any […]

Dogfood: making our systems more resilient

This is a “dogfood” type story (see below for explanation of the term)… Open Query has ideas on resilient architecture which it teaches (training) and recommends (consulting, support) to clients and the general public (blog, conferences, user group talks). Like many other businesses, when we first started we set up our infrastructure quickly and on […]

Your opinion on EC2 and other cloud/hosting options

EC2 is nifty, but it doesn’t appear suitable for all needs, and that’s what this post is about. For instance, a machine can just “disappear”. You can set things up to automatically start a new instance to replace it, but if you just committed a transaction it’s likely to be lost: MySQL replication is asynchronous, […]