Historical WN information

This page resulted from a desire to look at historical trends of purchases, replacements, and node failures in the NDPF. The raw data is present in the NDPF accounting database; in order to get the data into a form suitable for real analysis, some cleaning needed to be done: during the early days of the NDPF we had various node-naming conventions, a naive SQL query will yield multiple answers for the same physical node. This page describes the process of producing the desired dataset, which is included at the end of the page.