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[netCDF #GDB-514857]: RE: using netCDF for storing data from realtime source

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  • Subject: [netCDF #GDB-514857]: RE: using netCDF for storing data from realtime source
  • Date: Mon, 05 Feb 2007 15:06:33 -0700
I'm not sure about that.  A record variable is *not* stored as a solid block.  
Instead each record stores the values of all record variables for just that 
record.  A picture is here:

  
http://www.unidata.ucar.edu/software/netcdf/docs/workshop/performance/FileFormat.html

But you could still allocate space for a large number of records at the 
beginning of your program and gain some performance.  For example, if you write 
a fake value into the 1000th record, all the other records will also be written 
and prefilled with fill values (assuming you haven't turned off prefilling), 
which will take some time at the beginning.  But then the later addition of new 
records will be faster.

--Russ

Russ Rew                                         UCAR Unidata Program
address@hidden                     http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: GDB-514857
Department: Support netCDF
Priority: Normal
Status: Closed