For decades, discussion of software reuse was far more common than actual software reuse. Today, the situation is reversed: developers reuse software written by others every day, in the form of software dependencies, and the situation goes mostly unexamined.

Since 2013, we at the SmartData@Polito lab, Politecnico di Torino, have been conducting a large-scale measurement study from the perspective of a Tier-1 ISP based in Europe. We do this to better characterize Internet usage trends, as well as the technologies and infrastructure changes, that are being implemented by the industry for the benefit of forecasting potential changes and expenses.

This post describes WePay's highly available MySQL architecture, and how we achieve short outage times during failures.