Re: [thredds] Catalog example for AWS S3 resource?

  • To: Sean Arms <sarms@xxxxxxxx>
  • Subject: Re: [thredds] Catalog example for AWS S3 resource?
  • From: "H. Joe Lee" <hyoklee@xxxxxxxxxxxx>
  • Date: Mon, 9 Mar 2020 16:08:26 -0500
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 Thanks, Sean!

  Both .war file and sample catalog.xml worked like charm.
  For example, I could visualize MOP03T v7 on S3 using Panoply via THREDDS
OPeNDAP.
  Unidata Java team is amazing!

  So far, I found two issues though:

  1) toolsUI NcML tab doesn't work s3:// URL.
  2) It can't open a huge (15G~40G) netCDF-4 file like TerraFusion [1].

 Here's the error message that I got when I opened TerraFusion:

Error {
    code = 500;
    message =
"com.google.common.util.concurrent.UncheckedExecutionException:
java.lang.NegativeArraySizeException";
};

  Sincerely,


[1] https://registry.opendata.aws/terrafusion/
--
Datafy everything in HDF for faster AI.




On Mon, Mar 9, 2020 at 2:43 PM Sean Arms <sarms@xxxxxxxx> wrote:

> Greetings Joe,
>
> I recently split the netCDF-Java and TDS codebased into their own
> repositories, and the repository holding the appropriate TDS code is
> located at:
>
> https://github.com/Unidata/tds
>
> If you build the current master branch, you'll have everything you
> need at this point. The most recent snapshot should work as well:
>
>
> https://artifacts.unidata.ucar.edu/repository/unidata-snapshots/edu/ucar/tds/5.0.0-SNAPSHOT/tds-5.0.0-20200308.175757-566.war
>
> (just be sure to rename it to thredds.war before deploying it).
>
> The sample catalog I added to our integration tests for the TDS can be
> found here:
>
>
> https://github.com/Unidata/tds/blob/master/tds/src/test/content/thredds/tds-s3.xml
>
> Cheers,
>
> Sean
>
>
> On Mon, Mar 9, 2020 at 8:39 AM H. Joe Lee <hyoklee@xxxxxxxxxxxx> wrote:
> >
> >   Thanks, Ethan!
> >
> >   It's so cool to see toolsUI can access NASA HDF-EOS5 on S3.
> > I hope both IDV and Panoply can use the new netCDF-Java soon, too.
> >
> >   By the way, will the master branch of THREDDS use the latest
> netCDF-java?
> > If not, where should I modify in the THREDDS source code to build
> >  THREDDS with netCDF-Java snapshot?
> >
> >   I'm very excited to try the new THREDDS catalog with S3 datasetRoot
> path!
> >
> > Sincerely,
> >
> > --
> > Datafy everything in HDF for faster AI.
> >
> >
> >
> >
> > On Wed, Mar 4, 2020 at 10:52 AM Ethan Davis <edavis@xxxxxxxx> wrote:
> >>
> >> Hi Joe,
> >>
> >> [Sorry for the delayed response.]
> >>
> >> The S3 work moved to the Unidata/netCDF-java repo in PR #173 ("S3
> Support"). This PR got merged into master a week or so ago and is available
> in the netCDF-Java 5.3.0-SNAPSHOT release (and will be in the upcoming
> 5.3.0 release). The latest TDS code built with netCDF-Java 5.3.0-SNAPSHOT
> can be configured to serve an individual netCDF file stored as an S3 object
> using a datasetRoot configuration, e.g.
> >>
> >>
> >> <?xml version="1.0" encoding="UTF-8"?>
> >>
> >> <catalog name="Test TDS S3"
> >>
> >>   xmlns="
> https://www.unidata.ucar.edu/namespaces/thredds/InvCatalog/v1.0";
> >>
> >>   xmlns:xlink="https://www.w3.org/1999/xlink";
> >>
> >>   xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance";
> >>
> >>   xsi:schemaLocation="
> https://www.unidata.ucar.edu/namespaces/thredds/InvCatalog/v1.0
> >>
> >>     https://www.unidata.ucar.edu/schemas/thredds/InvCatalog.1.0.6.xsd";>
> >>
> >>
> >>   <datasetRoot path="s3-test" location="s3://noaa-goes16" />
> >>
> >>
> >>   <dataset name="Test GOES-16 S3" ID="testS3Grid"
> >>
> >>
> urlPath="s3-test/ABI-L1b-RadC/2019/363/21/OR_ABI-L1b-RadC-M6C16_G16_s20193632101189_e20193632103574_
> c20193632104070.nc"
> >>
> >>            dataType="Grid"/>
> >>
> >>
> >> </catalog>
> >>
> >>
> >> In this case, the datasetRoot location is the bucket name, and the
> urlPath is the datasetRoot path combined with the key. We rely on the AWS
> Java SDK (v2) to handle credentials, setting of region, etc. For now, you
> can set the region by creating a credentials file ~/.aws/credentials that
> looked like:
> >>
> >>
> >> [default]
> >>
> >> region=us-east-1
> >>
> >>
> >> Which is how netCDF-java knows which region to use for bucket access.
> We may look at other mechanisms to make that a bit more integrated into TDS
> configuration but for now that should work.
> >>
> >>
> >> Once the netCDF 5.3.0 release comes out, TDS snapshot builds will be
> built with this capability. For now, you would need to build the TDS and
> explicitly tell it to build with netCDF-Java 5.3.0-SNAPSHOT.
> >>
> >> Cheers,
> >>
> >> Ethan
> >>
> >> On Tue, Feb 4, 2020 at 2:30 PM H. Joe Lee <hyoklee@xxxxxxxxxxxx> wrote:
> >>>
> >>> Hi,
> >>>
> >>>   Is it possible to serve netCDF data on AWS S3 using THREDDS?
> >>>   I think it seems possible based on the S3 feature branch [1].
> >>>
> >>>   If so, can someone share an example THREDDS catalog configuration?
> >>>
> >>>   Regards,
> >>>
> >>> [1] https://github.com/Unidata/thredds/tree/feature/s3+hdfs
> >>>
> >>>
> >>> _______________________________________________
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> >>>
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