Mike, Correct, the rebuild merely recalculates the daily summary data and in most cases is just overwriting data that is already there (but potentially incorrect). In some cases there may be extra days of data in the daily summaries that is no longer required, or there could be something more seriously wrong. In these cases dropping the tables starts you from a clean slate. I mentioned in my last post the potential to lose some of the fine detail in the daily summaries by rebuilding them. This fine detail (depending on how you have weeWX configured) comes from loop data and is the highs, lows and times of these highs and lows. Just as rebuilding all the daily summaries will likely lose this fine detail so will dropping the daily summaries. So if ou can get away with rebuilding without dropping you have the best chance of retaining some of this fine detail provided you limitbyour rebuild with --from and --to.
Of course the other thing is simplicity, it is easier to say to a user 'just rebuild the daily summaries' rather than 'drop the daily summaries then rebuild them'; 1 step compared to 2. As for the rebuild taking less than 1 second, again that depends. Pertinent factors are how many archive records in your archive and how fast is your weeWX machine. For a RPi and if you have more than a couple of months of data I would expect more than a second. From memory (not in front of my PC just now) wee_database should display some info on screen (as well as the log). What is being displayed on screen? Gary -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
