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What is the objective of this page?

Info
titleThe objective:

To help users to improve S2S CMA MARS requests performance.

A good understanding of the MARS efficiency issues is essential especially for users that are interested in downloading large amounts of data.The aim of this page is to help users to improve their MARS requests performance focusing in CMA reforecast MARS requests.

How the S2S data is organised in general?

First you need to understand how the S2S data is organised in MARS.
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In general it is organised, as a huge tree, with the indentation below, showing different levels down that tree:

  • centre (ECMWF, NCEP, JMA, ...)
    • realtime or reforecast
      •  type of data (control forecast or perturbed forecast)
        • type of level (single level or pressure level or potential  temperature)
          • Hdates (2015-01-01 or 2015-01-05 or 2015-01-08, ...)
            •  time-steps
              • members (for perturbed forecast)
                • levels (for pl or pt)
                  • parameters


(lightbulb) The idea is to have in the same tape file, all time-steps, all members, all parameters for a type of level, a type, a Hdate

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