Re: [thredds] How do NetCDF unlimited dimensions affect TDS aggregation?

• To: thredds@xxxxxxxxxxxxxxxx
• Subject: Re: [thredds] How do NetCDF unlimited dimensions affect TDS aggregation?
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Thu, 06 Dec 2012 17:23:53 -0700

Hi John:

No, it actually probably improves the performance, but it all depends on what 
the read request is. A netcdf-3 file has only 2 possible layouts, namely with 
and without an unlimited dimension. see slide 4 of this:

 http://www.unidata.ucar.edu/staff/caron/presentations/NetCDFworkshop2012.pptx

its helpful for analysing performance to understand which your files have, is 
probably the point made at the TDS workshop.

John



On 11/26/2012 6:23 AM, John Kerfoot wrote:
> At the THREDDS workshop I attended in October, I vaguely remember 
> someone suggesting that an unlimited time dimension negatively affects 
> TDS aggregation.  Is this true?  If so, can someone explain how/why?
> 
> thanks,
> John
> 
> 
> 
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• References:
  • [thredds] How do NetCDF unlimited dimensions affect TDS aggregation?
    • From: John Kerfoot