Does anyone know anything about internet over power? I have been using a BT minihub to take power from one bit of the the house to another and it has been variable quality but mostly working. Since yesterday it has not worked at all. If I plug an extension cable in next to the source connector, take it to where it was plugged in and plug it into the extension cable it works well. I am guessing it is an electrically noisy appliance, or a failing electrical connection on the ring main but I really have no idea how these things work and fail. Anyone got any words of wisdom? I do not know much about DBA's, but I think it is a completely different job to data science. It is various roles from administrative roles handling who is allowed to access which database, data modelling roles such as is your database normalised and have all appropriate foreign keys to really technical aspects such as what is the optimum form of mirroring / striping for your particular requirements of capacity / read / write.