NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.

To learn about what's going on, see About the Archive Site.

FileField

Hi,
I'm looking for an efficient way to store data on disk for quick access via VisAD. My data look something like: 

  time -> ( (x,y,z) -> (a,b,c) )

and I'd like to cache a subset of the time samples for optimal performace.
I assume I want to use FileField (or FileFlatField?) but I'm not sure how to proceed. I intend to have a "server" with a large amount of data available via RemoteDataReferences. I'd populate the server by reading in data the usual way then dumping them to files. One big question is how should I create those files and read them. Should I use VisAD serialized or binary format (via VisADForm) or should I roll my own format and maybe use java.nio's memory-mapped IO?
It would help if I understood the difference between a Form (e.g. VisADForm) and a FileAccessor. 

Any suggestions?

Thanks,
Doug

--
*----------------------------------------------------------------------*
| Doug Lindholm, Software Engineer          |  E-mail: lind@xxxxxxxx   |
| Research Applications Program             |   Phone: 303-497-8374    |
| National Center for Atmospheric Research  |                          |
| P.O. Box 3000                             |     There's no place     |
| Boulder, Colorado 80307-3000              |        like $HOME        |
*----------------------------------------------------------------------*
  • 2003 messages navigation, sorted by:
    1. Thread
    2. Subject
    3. Author
    4. Date
    5. ↑ Table Of Contents
  • Search the visad archives: