LDM

Status Report: October 2014 - March 2015

Steve Emmerson, Mike Schmidt, Tom Yoksas

Strategic Focus Areas

The LDM group's work supports the following Unidata funding proposal focus areas:

  1. Enable widespread, efficient access to geoscience data
    The LDM powers the Unidata Internet Data Distribution (IDD) system.
  2. Provide cyberinfrastructure leadership in data discovery, access, and use
    The LDM allows sites to move data in their own environments.
  3. Build, support, and advocate for the diverse geoscience community
    The LDM is used by US universities and by entities throughout the world.

 

Activities Since the Last Status Report

Multicast-capable LDM-7

Work on the multicast sending and receiving components of LDM-7 is finished except for any unforeseen additional work revealed by integration testing with the Virtual Circuit Multicast Transport Protocol (VCMTP) layer. The VCMTP layer is in the last stages of development and unit-test and the LDM developer is helping with that effort. LDM-7 has the potential to greatly reduce the bandwidth used by the UPC to distribute data via the Internet Data Distribution (IDD) system.

LDM 6.12.7 released

  • Made it easier to run downstream-only LDM instances that don't interfere with an LDM server on the same computer.
  • NOAAPORT:
    • Diagnosed and fixed a bug in the GEMPAK GRIB2 library that caused WFO-s to miss some RUC, NAM, and GFS products (among others) when experimental multi-radar/multi-sensor products from NSSL were temporarily added to the NOAAPORT broadcast on February 17th and 18th.
    • Improved performance of finding GRIB2 parameter information by caching GEMPAK parameter tables.
    • Improved realtime performance.
    • Improved error-messages for GRIB2 products with unknown parameters or vertical coordinates.
    • Added entries to the GEMPAK NCEP parameter table.
    • Improved statistics reporting.
  • Squashed bugs.

Planned Activities

Ongoing Activities

We plan to continue the following activies:

  • Support LDM users
    • Email, phone, etc.
    • Training workshops
  • Work on multicast-capable LDM-7
  • Incrementally improve the LDM as necessary
  • Incorporate additional AWIPS-II-related changes into the LDM
  • Update table-driven decoding of GRIB products as necessary

New Activities

Over the next three months, we plan to organize or take part in the following:

  • Deploy multicast-capable LDM-7

Over the next twelve months, we plan to organize or take part in the following:

  • Deploy multicast-capable LDM-7