Dear LDM user,
Version 6.11.3 of the LDM is now available:
Announcement:
<http://www.unidata.ucar.edu/blogs/news/entry/ldm_6_11_3_released>
Version Homepage:
<http://www.unidata.ucar.edu/software/ldm/ldm-6.11.3/>
LDM Homepage: <http://www.unidata.ucar.edu/software/ldm/>
Download Homepage: <http://www.unidata.ucar.edu/downloads/ldm>
FTP access: <ftp://ftp.unidata.ucar.edu/pub/ldm/ldm-6.11.3.tar.gz>
GitHub Project: <https://github.com/Unidata/LDM>
This version improves on the anti-denial-of-service capability
introduced in version 6.11. It also contains a complementary capability
of ensuring that a downstream LDM doesn't make wasteful (i.e.,
overlapping) requests for data from the same upstream LDM.
This version has been ported to as many different Unix variants and
environments as exist at the Unidata Program Center. Unfortunately, this
means only certain versions of SunOS, Linux (Fedora and CentOS), and
Darwin (alias Mac OS/X). Gone are the days of IRIX, HP-UX, OSF/1, ...
(sigh/yipee! :-).
You are strongly encouraged to read the CHANGE_LOG file in the top-level
source-directory of the distribution.
An upstream version 6.11 LDM does have a "problem" with requests from
downstream LDM-s that are hidden behind a Network Translation Table
(NAT) device. Because the requests appear to come from the same
downstream IP address (that of the NAT device), the upstream LDM will
attempt to minimize any overlap in the requests -- which is probably not
what the downstream site wants. The solution is to have only one,
"gateway" downstream LDM request all the data and have the other
downstream LDM-s request the subset of data in which they're interested
from the gateway LDM.
Contact <support-ldm@xxxxxxxxxxxxxxxx> if this solution won't work for
you or if you have any other questions.
Regards,
Steve Emmerson
LDM Developer
