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Server upgrade, bad news, and good news
Published at 17:44. Filed under English version; 3 CommentsYou may have notice that 7Timer! has been running with frequent errors since July 11. I have to make apologize for this -- I intent to do a power-on upgrade of the server, however the process took much longer than usual and generate many unexpected problems, so the upgrade is not done yet. After working for two days, I barely got things back into normal - it is running okay at this moment, only with occasionary dataset missing at the Weachart section, but this is only a temporal solution.
To begin with, I am pleased to announce that 7Timer! has received a bond support from the Shanghai Astronomical Observatory, Chinese Academy of Sciences (http://www.astron.ac.cn), they kindly provided an excellent new server, which is intended to run 7Timer! applications ONLY.
However, due to some technical issues, the web application will remain at where it is placed at this moment (at a shared server at National Astronomical Observatories, Beijing). Now, with the generous help from Mr. Johnson Lau, I am working to make both servers working in a distributed ways, which can significantly speed up the process time. I hope the upgrade process can be completely done in a week. By then I will place another announcement here, and before that it is possible for other bad runs to occur.
7Timer! also received assistances from Shanghai Astronomical Observatory through out the year 2010 for new product development, so development of products such as "easyAP", "openAP" is now back on-schedule. I hope easyAP can be available for test by the end of August.
Thanks to all for your support of 7Timer!, your support is the key factor to make the project possible.
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Hi,
The weather prediction is stuck. Today is Wedenesday and the newest prediction is from MOnday and it does not update.
regards from San Luis Potosi in Mexico
Rainer
Comment by Rainer — July 21, 2010 @ 23:11
Dear Yeiht,
I am a loyal cutomer of your product but lately the predictions are 100% off.
¿ What is happening ?
Today the prediction for my site is nearly all day 100% clear but since I got up it is 100% clouidy and raining ¿?
You previous predictions maybe up to 4 weeks ago were about 90% correct.
I am in Mexico at the coordinates W 101.03 and N 22.14
I have an Astronomical Observatory and always relied on your predictions but as said since 4 weeks nothing matches.
regards Rainer
Comment by Rainer — July 23, 2010 @ 22:59
Hi Rainer, sorry for the late reply, I have been busy with the scripts these days! For the problem you encounter, I have found a possible reason (see the latest blog post), and it would make all cloud cover prediction <=70% appeared as 0%. This error only appeared since yesterday (when the server was replaced with a new one).
I am not sure if you have bad prediction all past four weeks -- I am also live in a region with tropical and marinal climate, and I have keep track of the performance of 7Timer for several years. Sometimes 7Timer could make bad guesses (the chance is higher than in-land areas), but it is highly unusual that it makes bad guesses through four weeks. It is impossible for any weather forecasts to be 100% accurate, but they are still quite reliable on trends. I am doing a research on the performance of GFS cloud model (the model which 7Timer employs) for several astronomical observatories, and the accuracy for a 3-day forecast is between 46%-79%, this is rather high compare to the previous research (only 10-20% in 1990s).
Comment by Quanzhi — July 24, 2010 @ 11:27