This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Rich, A data-product is transferred from one LDM to another via a single ONC RPC call over a TCP connection; thus, the correctness/completeness of the transfer is as correct and complete as the TCP connection. As far as we know, no successful transfer has been shown to be incorrect or incomplete. The data-product signature (i.e., MD5 checksum) is only used by the LDM to detect duplicate products: it isn't used to verify a product. That job is done by the TCP checksum in the individual packets. > How is the completeness of a file validated? Can a CRC be run at a given > point in time? Regards, Steve Emmerson Ticket Details =================== Ticket ID: WDH-540558 Department: Support LDM Priority: Normal Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.