[Go-essp-tech] CMIP5 Datanode : data access services.

[Sébastien Denvil]

  Thanks Luca.


On 02/05/2011 15:38, Cinquini, Luca (3880) wrote:
> Hi Sebastian,
> 	the ESGF security infrastructure can be used for opendap access - infact, this is already working at JPL. Once opendap
> access is configured with security, users can use either a browser or an esg-enabled client to access datasets.

Great. At least with opendap they can access from the browser a region 
if they know array indices that cover it. If they have nco operator with 
opendap client enable they should in theory be able to extract their 
area using physical lat/lon. Not everyone has made this nco compilation.

The good thing with netCDF subsets is that it works with longitude and 
latitude from the browser.... Lot of browser addict out there.

> I will try to write some documentation on the esgf.org wiki either this evening or tomorrow, and then let you try it out...
>
> thanks for raising the issue, I meant to start an email conversation on this but never quite got to it...

That's already big fun to setup model / run them / produce & distribute 
those data. We tried hardly in the past and was discourage by the 
difficulty and the fact that we did not know how to find out precisely 
what was supposed to work and what was not (given the day we install the 
stack). In that case it's not easy to investigate and to find a way to 
contribute without being in the development main stream.

Glad to hear it should be smooth install now. We will read your notes 
and try it out with confidence.

Cheers.
Sébastien

ps : any further comments about gridFTP or netcdf subsets? If you say it 
should work we will try and report, but we need this green light to try.

> Luca
>
> On May 2, 2011, at 7:32 AM, Sébastien Denvil wrote:
>
>>   Dear all,
>>
>> we received increasing demand asking for regional model boundary
>> conditions from CMIP5 simulations. Those datasets are heavy and
>> therefore "wget" is not my favourite answer. I would like this answer to
>> be base on a ESG-F solution and not a home made one.
>>
>> In order to build a meaningful response I would like to know what are
>> the plan regarding the datanode to have :
>> - openDAP enable with CMIP5 filters.
>> - netCDF subsets enable with CMIP5 filters.
>>      * openDAP and/or netCDF subsets will be very useful for those
>> focusing on a specific region (Africa OR Asia for example). They could
>> then extract only the area of interest.
>>
>> - gridFTP enable with CMIP5 filters.
>>      *gridFTP will be very useful for those focusing on many regions
>> and/or doing the CORDEX exercise but without a limited area model. It's
>> very likely that they will download the whole datasets.
>>
>> My understanding is that gridFTP is not fully functional at this point
>> of time and that openDAP and netCDF subsets are not yet secure by the
>> ESG-F security layer.
>>
>> A corollary coming from those questions : Is there a documentation we
>> could refer to if we want to update a production data node?
>>
>> Please refine my understanding.
>>
>> Thanks.
>> Sébastien
>>
>> -- 
>> Sébastien Denvil
>> IPSL, Pôle de modélisation du climat
>> UPMC, Case 101, 4 place Jussieu,
>> 75252 Paris Cedex 5
>>
>> Tour 45-55 2ème étage Bureau 209
>> Tel: 33 1 44 27 21 10
>> Fax: 33 1 44 27 39 02
>>
>>
>> <smime.p7s>_______________________________________________
>> GO-ESSP-TECH mailing list
>> GO-ESSP-TECH at ucar.edu
>> http://mailman.ucar.edu/mailman/listinfo/go-essp-tech
>


-- 
Sébastien Denvil
IPSL, Pôle de modélisation du climat
UPMC, Case 101, 4 place Jussieu,
75252 Paris Cedex 5

Tour 45-55 2ème étage Bureau 209
Tel: 33 1 44 27 21 10
Fax: 33 1 44 27 39 02


-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4172 bytes
Desc: S/MIME Cryptographic Signature
Url : http://mailman.ucar.edu/pipermail/go-essp-tech/attachments/20110502/a1d4a149/attachment.bin