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[netCDFJava #LAJ-287331]: fixed size overhead of a NetCDFv4 file



> Dennis:
> 
> I am wondering whether you need anymore information that allows us to better 
> understand the size overhead of NetCDFv4 files.
Thanks for the reminder. I was doing some experiments on this, but got 
side-tracked.

> 
> I have attached the original email I sent you for completeness below …
> 
> v/r
> 
> randy
> 
> 
> ++++++
> 
> Dear Sir:
> 
> we are generating lots of relatively small (from a data content standpoint) 
> NetCDF files (approximately 800 kilobits mostly spread across two variables), 
> and sending them over a network.  Monitoring this message flow reveals 
> substantially higher bandwidth than anticipated.
> 
> We are thinking the remaining size contribution is due to the fixed size 
> overhead of a NetCDFv4 file.
> 
> What is a rough order magnitude size overhead value for a NetCDFv4 file 
> containing about 5 dimension declarations, 13 variables, each with about 10 
> attributes each, and 15 global attributes. (this may be wy more info than you 
> need)
> 
> Any elaboration of the value that will be helpful to us in making design 
> choices moving forward will be appreciated
> .
> 
> v/r
> 
> randy
> 
> 
> ++++++
> 
> 
> 
> 
> > On Sep 15, 2017, at 10:34 AM, Nguyen, Trevin <address@hidden> wrote:
> >
> > Good morning,
> > I'm following up on an email my coworker had sent to you. I've attached a 
> > text file containing the output of "ncdump -h <filename>" as requested. My 
> > coworker wanted me to mention that the size of the files is ~1.5 Mbits 
> > rather than ~800Kbits. I've cc'd him as well so he gets any responses to 
> > this email.
> >
> > -Trevin
> > <ncdump.txt>
> 
> _____________________________________
> 
> Randy C Horne (address@hidden)
> Principal Engineer, Excalibur Laboratories Inc.
> voice & fax: (321) 952.5100
> cell: (321) 693.1074
> url: http://www.excaliburlabs.com
> 
> 
> 
> 
> 

=Dennis Heimbigner
  Unidata


Ticket Details
===================
Ticket ID: LAJ-287331
Department: Support netCDF Java
Priority: Normal
Status: Open
===================
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