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Re: [idvusers] [idv-developers] Changes to thredds.ucar.edu

Sean:
I can try the URL remapping service, but some of my students have never done anything with regards to opening terminal windows and copying files. Thus, I can walk them through it and it's better than the option of having nothing work, but it's not an ideal situation.
Bundles are extremely essential in many of my teaching efforts. They take a long time to produce and configure. We were told that, "Bundles that use thredds.ucar.edu should not be impacted, as the urls to the latest and best time series files/collections are the same." The UPC needs to take a very careful look at the decisions that were made and the testing that was done for this upgrade, especially with regards to communications. We don't know how many people are negatively impacted by this problem. Maybe Don and I are just a couple of mad scientists who just do things differently, but something needs to be communicated to the community ASAP. 

Jim


On 3/31/14 9:05 AM, Sean Arms wrote:

Hi all.
This was tested using bundles on the community resources page on RAMADDA (including your bundles and Jim's bundles), as well as the IDV bundle test suite, before the switch was made from thredds-dev to thredds, as well as after. However, I see this morning that your bundles do not work. I think there were changes made to thredds.ucar.edu over the weekend, and I'm not sure what is going on yet. John isn't in at the moment, but as soon as he is, I'll see what's up.
In the meantime, you can use the URL remapping service of the IDV to redirect your bundles to thredds-dev.unidata.ucar.edu. Just put the attached xml file in the $HOME/.unidata/idv/DefaultIdv directory. The only difference between thredds and thredds-dev is that one is on a solaris machine, and the other is on a linux machine. Don - I just tried both of your bundles that you linked to, and they seem to work without any errors (in both 4.1 and 5.0 nightly). 

Can you add the server mapping info and try again?

Thanks,

Sean

On 3/31/14, 8:14 AM, Don Murray (NOAA Affiliate) wrote:

Hi Sean-

My bundles that access grids from thredds.ucar.edu no longer seem to
work after this change.  For example, this bundle:
http://www.esrl.noaa.gov/psd/repository/entry/get/gfs80km.xidv?entryid=8ed2cb87-762c-4bf2-af7e-1ef959db2b11 


gives no error, but loads no data.  My Boulder bundle:
http://www.esrl.noaa.gov/psd/repository/entry/get/boulderweather.xidv?entryid=b569207d-8470-4054-9605-d7ebb227810b 


gives an error (submitted support-idv request).

I have bundles that continuously update and they stopped updating on
Frinday.

Don

On 3/28/14 3:36 PM, Sean Arms wrote:

Greetings!
The TDS server thredds.ucar.edu has been updated to version 4.5. Part of the move is related to security concerns raised over the past month, and 
part is due to the unreliability of GRIB collections to update properly
in the old version (4.3.21). There are also several improvements and
bugfixes in 4.5.

For the IDV, this update will mostly improve access to GRIB data served
from Unidata (no more "permission denied" issues, no more stale files,
etc.).

Bundles
=======
Bundles that use thredds.ucar.edu should not be impacted, as the urls to 
the latest and best time series files/collections are the same. None of
the variable names should have changed, unless it is due to an updated
GRIB-1/2 table.

Browsing thredds.ucar.edu
=========================

You may notice a few differences in the way data are displayed. Some of
them are temporary (such as datasets being listed from oldest to newest
- this will be reversed asap), while others not. For example, there is a 
new dataset listed under GRIB collections called "Full Collection
(Reference / Forecast Time) Dataset". This dataset contains two time
coordinates, and allows for slicing and dicing similar to the "constant
forecast offset" and "constant forecast hour" from the older, deprecated 
FMRCs. Currently, the IDV cannot take advantage of these collections,
but we hope to enable them in the near future.

If you have any questions, or run into any bugs, please contact
support-idv@xxxxxxxxxxxxxxxx or support-thredds.unidata.ucar.edu.

Cheers!

Sean
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