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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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On Mar 11, 2014, at 7:56 AM, "Tyle, Kevin R" <ktyle@xxxxxxxxxx> wrote: > >> More often, I see they have the same data source loaded multiple times. > >> Not plotted multiple times ... but there nonetheless. Need to inquire > >> among the students to see what thought processes make this happen. How > >> hard would it be to have the user interface say "You have already loaded > >> this data source, are you sure you want to do so again?" Tyle, Interesting point--I've run into this intermittently, too. The IDV could recognize that a file with the same name has already been loaded and, as you suggest, interrupt with a query (and the interruption might sometimes be briefer than reloading the data). Even more useful, though, might be to issue a query only if the creation/modification date of the requested data file had not changed since it was last loaded. That is, reloading the same file is probably only an issue when the file hasn't changed since it was previously loaded--otherwise, reloading the (changed) file would probably be a good thing, usually. Don worked on a perhaps related situation in which I have symbolic links with unchanging names (e.g., "latest_GFS.grb") pointing to a new file every six hours. The problem of recognizing when the the contents of a file has changed even when the name of the file hasn't changed, comes up in a sense in that case, too. The solution, if there eventually will be one, turns out to trace to NetCDF-Java, not the IDV (or the RAMADDA server, which is the context where Don diagnosed it). -- Dave *************************************************************** * Dr. Dave Dempsey | ^ ___ \|/ * * Dept. of Earth & Climate Sciences | ) ^ /||_||\ --0-- * * San Francisco State University | ) ) / ||_|| \ /|\ * * 1600 Holloway Ave. | ) ) / ||_|| \ * * San Francisco, CA 94132 | ) ) / ||_|| \ ^ * * | ) ) ) ||_|| \ * * Phone: (415) 338-7716 | ) ) )~||~||~~~~ \~~* * FAX: (415) 338-7705 | ) ) ) ) ~ ~ ~ ~ ~ ~* * Email: dempsey@xxxxxxxx | ) ) ) ) ) ~ ~ ~ ~ * ***************************************************************
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