Thomas, > How does the user access data serve under LDM (HTTP/FTP/etc)? A user who wishes to subscribe to certain data-products adds a REQUEST entry to their LDM configuration-file. The entry specifies the upstream host and the desired data-products. > If I have a collection of NETCDF observational data, what do I need to do > to get it ingested into LDM. As an active archive, we need to keep > ingesting the latest archived data into LDM. Ingestion usually takes > time. Could LDM able to overlay on top of existing (readonly) file system > and process the NETCDF there? Does it maintain its own cache or archive? Data-products are "injected" into an LDM distribution system by inserting them into an LDM product-queue (which, typically, holds about one hour's worth of data). From there, the data-products are distributed according to the topology of the LDM network as determined by the individual REQUEST entries. The LDM package contains a program (pqinsert) that converts files into data-products and inserts them into the product-queue. > Sorry for all the questions. I am poking through your documentation site > and it is not very clear. If you have existing tutorial material to get > met start, it will be greatly appreciated. Well, you could try the LDM tutorial at <http://www.unidata.ucar.edu/software/ldm/ldm-current/tutorial/index.html>. I'm afraid it's not very good but it's a start. Feel free to ask me questions. > Thanks, > > Thomas. > > -- > Thomas Huang > Jet Propulsion Laboratory > 4800 Oak Grove Drive, Mail Stop 171-264, Pasadena, CA 91109 > Phone: 818.354.2747, Email: address@hidden > > DISCLAIMER: All personal and professional opinions presented herein are my > own and do not, in any way, represent the opinion or policy of JPL, NASA > or Caltech. Regards, Steve Emmerson Ticket Details =================== Ticket ID: PYO-163672 Department: Support LDM Priority: Normal Status: Closed
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