Dan, > I was hoping that you could please validate some statements along with > answer a questions. > > An upstream LDM has to allow a specific downstream LDM. The set up and > configuration to receive data isn't automatic. Thus the LDM peer to > peer model isn't purely subscription based, it is predefined and > requires administrative updates to upstream LDM servers. Not quite. In order to reaceive data, the hostname or IP address of a downstream LDM must match a regular-expression in an ALLOW entry in the upstream LDM's configuration-file. Because regular-expressions are used, the upstream site is able to allow a single downstream host, all hosts at a site, all host in a domain (e.g., ".edu"), or a list of such specifications. > The upstream LDM server can limit products that can be delivered to any > downstream LDM server. Thus a downstream user cannot request > "everything" or denied products from an upstream server. Correct. Besides filtering on feedtype (an integer) the upstream site can specify, via regular-expressions, what data-products are allowed and what data-products are disallowed. > Is the capability to limit users in the ldmd.conf file dynamically > loaded, thus can the LDM server continue to run and get updates related > to allowing/limiting access to certain data from certain users? Because the LDM configuration-file must be reread, it is necessary to stop and restart the LDM to accomplish this. This can take anywhere from less than a second to several seconds -- depending on the number of connections. > When a third tier LDM server requests data from a second tier LDM server > and the second tier server doesn't have it, the request for data isn't > automatically propagated to the first tier server. That's correct. This will be fixed in the LDM replacement. > A second tier server is able to connect to multiple first tier servers. > Thus a first tier server can limit the access to the second tier and the > third tier servers below that. I'm not sure what you're asking. A downsream LDM can connect to any LDM that has an ALLOW entry that matches the feedtype and host identifier. > Can an LDM server limit the amount of bandwidth that it takes up for > distributing products on a per user basis? No. I'm thinking about adding that feature to the LDM replacement. > Thanks for all your help. > > Thanks > dan Regards, Steve Emmerson Ticket Details =================== Ticket ID: WYF-519931 Department: Support LDM Priority: Normal Status: Closed
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