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Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
On Fri, Feb 22, 2013 at 11:32 AM, Russ Rew <russ@xxxxxxxxxxxxxxxx> wrote:
> It means that if you have a variable with an unlimited dimension, such
> as
>
> float var(time, lon, lat)
>
> where time is unlimited, then the default chunks will be of shape
>
> 1 x clon x clat
>
> values (not bytes), for integers clon, clat computed to be smaller
> than but proportioanl to the sizes of the lon and lat dimensions
Let me see if I understand. Here's the setup of my file:
----------------
dimensions:
step = UNLIMITED ;
cell = 100 ;
variables:
float temperature(step, cell) ;
float flux(step, cell) ;
float energy(step, cell) ;
byte steadyState(step) ;
-----------------
So -- by default -- temperature, flux, and energy will have a chunk size of
-- "smaller than but proportioanl to", meaning smaller than? -- 100 floats
(so 400 bytes)? Likewise, by default, steadyState will have a chunk size of
1 byte? (Since it can't be smaller.)
If that's true, that does sound terribly inefficient.
And I override these defaults by providing a chunksizes array when calling
NF90_DEF_VAR?
-Leon
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