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Ich bin einverstanden
April 8th, 2021
- The complete data acquision on a dev server had been changed from DODS downloads to HTTPS downloads.
(Speed) comparasion:
|
DODS-downloads |
HTTPS-downloads |
GFS-Parameters (atmoshere data) |
19 |
33 of more than 600 available |
Resolution in data points (lat*lon) |
361*720 |
721*1440 |
Timesteps |
81 (3h, 10 days) |
288 (1h, 5 days, 3h day 6-10) |
Datapoints |
400 016 880 |
9 867 432 960 |
Dataformat |
netcdf |
grib2 |
Time to download |
720 sec |
170 sec |
speed factor per data point |
1 |
104 times faster |
|
|
|
GFSwave-Parameters (ocean wave data) |
9 |
19 |
Resolution (lat*lon) |
336*720 |
721*1440 |
Timesteps |
61 (3h, 7,5 days) |
288 (1h, 5 days, 3h day 6-10) |
Datapoints |
132 814 080 |
5 681 249 280 |
Dataformat |
netcdf |
grib2 |
Time to download |
360 sec |
130 sec |
speed factor per data point |
1 |
118 times faster |
|
|
|
RTOFS-Parameters (Ocean data exept wave data) |
5 |
10 |
Resolution (lat*lon) |
2160*4320 |
3298*4500 |
Timesteps |
65 (3h, 8 days) |
112 (1h, 3 days, 3h, day 4-8) |
Datapoints |
3 032 640 000 |
16 621 920 000 |
Dataformat |
netcdf |
netcdf |
Time to download |
6240 sec |
990 sec |
speed factor per data point |
1 |
34 times faster |
|
|
|
- new: parallel downloads (about 5-6 times faster with 10 parallel downloads)
- new: partial https downloads are reducing the server load on NOAA side (about 5 times faster than requests through DODS server)
- new: unsage o grib2 format instead of netcdf (about 4 times faster due to transmission of compressed data)
- new. complete rewritten validation of correctness of the received data
March 1st, 2021
- Due to slow and unreliable downloads via the DODS-server, the decision for a change of the complete data acquision to https-downloads had been made.
Also the support for the https downloads seems to be much better then for the DODS server.