To check the Data availability you should have Access to the MARS Catalogue. you will view all the experiments that are available from our archive. We strongly recommend you to to navigate through MARS Catalogue to become familiar with the availability of our archive. You may select a class and start navigate trough the contents. Please take into account some considerations about the content: - Different class and stream include different parameters, times, and steps
- In each class not all the parameters are available from all steps
- In each class and stream not all the steps are available from all times
The web-application above will help you to check and understand the availability. For any kind of selections the system will update the attributes in a dynamic way to reflect the current availability. (i.e. if you change the steps some parameters will be added or removed). Info |
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| We encourage users to use the "View MARS request" feature once the selection has been done. |
You can also use list action with output=cost keyword to see the available data and its cost without need to retrieve it. This is useful to check the amount of data and number of tapes that your request will need to access. If your request takes longer than expected, it is a good practice to check its cost. Expand |
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title | expand list action... |
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| Code Block |
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list,
class = od,
stream = oper,
expver = 1,
date = 20020501/to/20020510,
time = 00/06/12/18,
type = an,
levtype = sfc,
param = sea surface temperature,
output = cost | ,
target =
'''
server.execute(req, "sst.list") |
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This would produce something like: Code Block |
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size=21599920;
number_of_fields=40;
online_size=21599920;
off_line_size=0;
number_of_tape_files=0;
number_of_disk_files=1;
number_of_online_fields=40;
number_of_offline_fields=0;
number_of_tapes=0; |
Indicating that the size of this request will be 20.59 Mb (output is in Kb) and that it is fully located in the online disk (no need to access any tape). Warning |
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Bear in mind that the maximum value of number_of_tapes recommended is 1 tape per request and should not exceed 3. Otherwise we strongly encourage you to split it in several different requests iterating by date.
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If you do not set the "output=cost" keyword on the list action, the output will show you information about the type of requests and the entries: Code Block |
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language | bash |
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title | sst.list |
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| class = od
expver = 1
file[0] = hpss:/mars/prod/od/o/oper/an/sfc/marsodoper/1/an/20020501/sfc/126665.20031108.113424
id = 126665
levtype = sfc
month = 200205
stream = oper
type = an
year = 2002
date file length missing offset param time
2002-05-01 0 539998 . 4729126 34.128 00:00:00
2002-05-01 0 539998 . 37233582 34.128 06:00:00
2002-05-01 0 539998 . 69738038 34.128 12:00:00
2002-05-01 0 539998 . 102242494 34.128 18:00:00
2002-05-02 0 539998 . 134746950 34.128 00:00:00
2002-05-02 0 539998 . 167251406 34.128 06:00:00
2002-05-02 0 539998 . 199755862 34.128 12:00:00
2002-05-02 0 539998 . 232260318 34.128 18:00:00
2002-05-03 0 539998 . 264764774 34.128 00:00:00
2002-05-03 0 539998 . 297269230 34.128 06:00:00
2002-05-03 0 539998 . 329773686 34.128 12:00:00
2002-05-03 0 539998 . 362278142 34.128 18:00:00
2002-05-04 0 539998 . 394782598 34.128 00:00:00
2002-05-04 0 539998 . 427287054 34.128 06:00:00
2002-05-04 0 539998 . 459791510 34.128 12:00:00
2002-05-04 0 539998 . 492295966 34.128 18:00:00
2002-05-05 0 539998 . 524800422 34.128 00:00:00
2002-05-05 0 539998 . 557304878 34.128 06:00:00
2002-05-05 0 539998 . 589809334 34.128 12:00:00
2002-05-05 0 539998 . 622313790 34.128 18:00:00
2002-05-06 0 539998 . 654818246 34.128 00:00:00
2002-05-06 0 539998 . 687322702 34.128 06:00:00
2002-05-06 0 539998 . 719827158 34.128 12:00:00
2002-05-06 0 539998 . 752331614 34.128 18:00:00
2002-05-07 0 539998 . 784836070 34.128 00:00:00
2002-05-07 0 539998 . 817340526 34.128 06:00:00
2002-05-07 0 539998 . 849844982 34.128 12:00:00
2002-05-07 0 539998 . 882349438 34.128 18:00:00
2002-05-08 0 539998 . 914853894 34.128 00:00:00
2002-05-08 0 539998 . 947358350 34.128 06:00:00
2002-05-08 0 539998 . 979862806 34.128 12:00:00
2002-05-08 0 539998 . 1012367262 34.128 18:00:00
2002-05-09 0 539998 . 1044871718 34.128 00:00:00
2002-05-09 0 539998 . 1077376174 34.128 06:00:00
2002-05-09 0 539998 . 1109880630 34.128 12:00:00
2002-05-09 0 539998 . 1142385086 34.128 18:00:00
2002-05-10 0 539998 . 1174889542 34.128 00:00:00
2002-05-10 0 539998 . 1207393998 34.128 06:00:00
2002-05-10 0 539998 . 1239898454 34.128 12:00:00
2002-05-10 0 539998 . 1272402910 34.128 18:00:00
Grand Total:
============
Entries : 40
Total : 21,599,920 (20.5993 Mbytes)
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Spend some time to understand how it works, make some selections try to execute the MARS scripts. |