Local Data Manager (LDM)

LDM The Unidata Local Data Manager (LDM) system includes network client and server programs designed for event-driven data distribution, and is the fundamental component comprising the Unidata Internet Data Distribution (IDD) system.

See the LDM package overview
Internet Data Distribution (IDD)

IDD Over 160 universities in the Unidata Community are participating in IDD, a system for disseminating near real-time earth observations via the Internet. The Unidata IDD has been in operation on a 24x7 basis since 1995.

More about the Unidata IDD
LDM News & Announcements
  • LDM 6.11.4 Released LDM 6.11.4 Released
    April 3, 2013

    Version 6.11.4 of the Local Data Manager (LDM) has been released. This version fixes and improves the defense against a denial-of-service attack, which is new with version 6.11. Getting the defense right was trickier than initially thought.

    Read more...

  • LDM 6.11.2 Released LDM 6.11.2 Released
    December 21, 2012

    Version 6.11.2 of the LDM has been released.

    This version modifies the rejection of a subscription by a downstream LDM. Before, both FEEDME subscriptions and NOTIFYME subscriptions were treated identically: if a downstream site had a REQUEST entry for feedtype ANY and pattern ".*", then a subsequent, default notifyme(1) execution would be rejected by the upstream LDM because it duplicated the REQUEST-based subscription. Now, the upstream LDM will not reject the notifyme(1)-based subscription because the two subscription categories are handled separately.

    This version can be downloaded at http://www.unidata.ucar.edu/downloads/ldm.

    This version's homepage.

More GEMPAK news

Next-Generation LDM

Next-Generation LDM The goal of the Next-Generation LDM project is to preserve the the best features of the current LDM while addressing its shortcomings. The next-generation LDM will focus on minimize bandwidth consumption while supporting dynamic routing, data sharing, arbitrary data-products and modern application conventions.

More about the Next-Generation LDM
Questions About LDM?

Questions or comments about LDM can be sent to: support-ldm@unidata.ucar.edu

LDM Documentation & Training

Documentation LDM software documentation contains a wealth of useful information. The training information and tutorials used during the LDM training workshops are available online as a resource to our community.

LDM Documentation
LDM Training
  • Workshop Tutorial The LDM workshop tutorial covers installing, configuring and monitoring the LDM.
  • Tutorial A basic LDM tutorial is available to demonstrate common LDM features.
Next Training Workshop
  • Training Workshop The next Training Workshop for Unidata software is scheduled to take place in 2012. The specific dates will be posted when they become available.

Questions About LDM Documentation & Training?

Questions or comments about LDM documentation or training can be sent to: support-ldm@unidata.ucar.edu

LDM Help & Support

LDM-Related Support Requests

Request Support To submit a LDM-related support reques, submit an email to one of the following addresses, or use the support request form to compose your queries.

Support Topic Email Address
(add @unidata.ucar.edu)
LDM support-ldm
IDD (General) support-idd

Complete list of all Unidata support queues

Ways to Get Support

LDM Mailing Lists

Mailing Lists LDM-related mailing lists of general interest for discussing installation issues and troubleshooting, as well as general software announcments and bug fixes, etc.

List Name List Description
ldm-users
@unidata.ucar.edu
High list traffic 		This is an unmoderated list for announcements, discussions, bug reports, and questions about the LDM software and Unidata's Internet Data Distribution (IDD) system. It is also the main list for general data requests when data have been missed (other users will help replace the missing data). Typical postings include discussions on using the LDM; discussions of issues related to porting to various platforms; information about changes to stations; and discussion of issues and priorities affecting the further development of the LDM and the IDD.
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idd-brasil
@unidata.ucar.edu
Medium list traffic 		The idd-brasil email list is akin to the ldm-users email list. It was created for South American IDD participants so they could correspond with each other about IDD related issues in their native languages which are either Portugese or Spanish.
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Low list traffic
low list traffic 		Medium list traffic
medium list traffic 		High list traffic
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