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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 12:54:53 -0700
Sjur,

I just constructed a small test case to time appending a record to a file using 
the C++ interface when there are a large number of records.  I use a variable 
that required 1 Mbyte for each record, and timed appending a record when the 
number of records already in the file was 1, 250, 500, 1000, and 2000.  I saw 
only small differences in the time to append a record, though it's possible 
that the file was cached in memory, so I wasn't really timing I/O properly.  I 
just tried it again after a few minutes of doing other things, and the time is 
still the same for appending record 2001.

I think the effect you saw should be large enough to show up with 2000 times as 
many records.  So for now, I can't reproduce the problem, and will assume it's 
not a bug in netCDF.  But thanks for checking and reporting the problem, it's 
actually good to gain confidence that things seem to be working the way I think 
they should :-).

--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