IDD and NOAAPort
Status Report: April 2013 - September 2013
Mike Schmidt, Jeff Weber, Tom Yoksas
Strategic Focus Areas
The IDD/NOAAPort group's work supports the following Unidata funding proposal focus areas:
- Enable widespread, efficient access to geoscience data
A project like the IDD demonstrates how sites can employ the LDM to move data in their own environments.
- Develop and provide open-source tools for effective use of
The IDD is powered by the Unidata LDM-6 which is made freely available to all. The Unidata NOAAPort ingest package is being used by a variety of university and non-university community members. Both the LDM and NOAAPort ingest packages are being bundled by Raytheon in AWIPS-II.
- Provide cyberinfrastructure leadership in data discovery,
access, and use
The community-driven IDDs provide push data services to users an ever increasing community of global educators and researchers
- Build, support, and advocate for the diverse geoscience
Providing access to data in real-time is a fundamental Unidata activity.
The IDD-Brasil, the South American peer of the North American IDD operated by the UPC, is helping to extend real-time data delivery outside of the U.S. to countries in South America and Africa. The Universidad de Costa Rica is experimenting with relaying data received in the IDD to Colombia.
Internet Data Distribution (IDD)
- Unidata continues to act as a toplevel relay in NEXRAD Level II data distribution for university sites and others that were receiving data from the MAX GigaPoP that was decommissioned by the NWS. The other toplevel relay sites for Level II data are the ERC (Education and Research Consortium), IRaDS (Integrated Robust Assured Data Services), and Purdue University.
- Unidata is receiving High Resolution Rapid Refresh (HRRR)
grids (both 2D and 3D fields) in an
LDM/IDD feed from NOAA/GSD. The intention is to make these products are available
now from the Unidata-operated toplevel IDD relay,
idd.unidata.ucar.edu. The challenge in making the data routinely available
is its large data volume which is on the order of ~8GB for the pressure level
output and ~10 GB/hour for the sigma level output. We have a test ingest of
this data and soon the FIM output going to our LDM on gale.unidata.ucar.edu
The HRRR is being experimentally served at: http://lead.unidata.ucar.edu/thredds/catalog.html (.xml for machines)
- The UPC continues to relay FNMOC and the CMC data model output directly to the
community. FNMOC provides the COAMPS and NAVGEM model output
and the CMC provides the
GEM model output. Unidata has provided access to these data for the
past 8 years, but on a "point-to-point" basis. GEM model output was converted
from GRIB1 to GRIB2 in January. The CMC is now relaying output
of there new hi-resolution (15km) GEM
model to Unidata. The 60 km output is going away permanently once the CMC
is confident with the 15 km output.
The CMC has culled the 60 km output and the 15 km output is available.
NOAAPort Data Ingest
- NOAAPort ingest has been functioning near-flawlessly since the NWS transitioned the SBN from DVB-S to DVB-S2 in April/May 2011. The switchover was smooth enough that end-users should have never noticed the change.
- The NOAAPort ingest package was bundled with the LDM starting in version 6.10. The current LDM releases is 6.11.6.
- Raytheon bundles a modified version LDM-6 with AWIPS-II and is actively managing NOAAPort ingest at a variety of NOAA offices using the Unidata NOAAPort ingest package. Raytheon's LDM modifications are evaluated by the UPC LDM developer and incorporated into Unidata releases when possible
Relevant IDD Metrics
- Approximately 530 machines at 230 sites are running LDM-6 and
reporting real time statistics to Unidata. Unidata staff routinely assist in the
installation of LDM-6 at user sites as a community service.
- IDD toplevel relay node, idd.unidata.ucar.edu
The cluster, described in the June 2005 CommunitE-letter article Unidata's IDD Cluster, routinely relays data to more than 700 downstream connections. Data input to the cluster nodes now routinely averages about 15 GB/hr (~0.36 TB/day); average data output from the entire cluster exceeds 1.1 Gbps (~13 TB/day); peak rates routinely exceed 2.2 Gbps (which would be ~24 TB/day if the rate was sustained).
Data Volume Summary for uni14.unidata.ucar.edu Maximum hourly volume 24616.334 M bytes/hour Average hourly volume 14715.416 M bytes/hour Average products per hour 301309 prods/hour Feed Average Maximum Products (M byte/hour) (M byte/hour) number/hour NEXRAD2 4968.862 [ 33.766%] 7773.620 58104.419 CONDUIT 3360.759 [ 22.838%] 5951.002 73165.674 NEXRAD3 1771.104 [ 12.036%] 2613.084 82611.233 FSL2 1470.696 [ 9.994%] 1689.036 1679.163 FNMOC 1191.942 [ 8.100%] 6377.187 3831.977 NGRID 1159.965 [ 7.883%] 2162.388 20694.884 HDS 336.975 [ 2.290%] 626.555 17387.070 NIMAGE 154.734 [ 1.052%] 303.847 193.907 FNEXRAD 85.075 [ 0.578%] 100.183 71.000 GEM 84.144 [ 0.572%] 412.781 1000.395 EXP 51.187 [ 0.348%] 94.668 414.395 IDS|DDPLUS 49.994 [ 0.340%] 63.720 41773.419 UNIWISC 24.517 [ 0.167%] 32.629 30.233 DIFAX 3.286 [ 0.022%] 12.466 4.814 LIGHTNING 2.083 [ 0.014%] 4.222 345.651 GPS 0.093 [ 0.001%] 1.327 1.000Currently six real server nodes operating in one location on the UCAR campus (in the UCAR co-location facility in FL-2) and two directors comprise idd.unidata.ucar.edu. The cluster approach to IDD relay has been adopted by NOAA/GSD, Penn State and Texas A&M.