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On Oct 27, 2014, at 8:46 PM, However, you don't want chunks to be very small or very large just for the > sake of efficiency. The ideal size and shape for a chunk is dictated by > what access patterns you anticipate to be common, to make each access one > chunk. > Indeed, but I suspect that you'd hardly notice the difference between large and really large chunk sizes. For instance a chunk larger that your disk cache would probably buy you nothing. What's a typical disk cache these days? I have no idea. But I'll guess you won't see a noticeable drop in performance for a multi-gigabyte read if you use a 10MB or so chunk size. If you do any testing, please post your results here. -Chris > --Russ > > On Mon, Oct 27, 2014 at 12:13 AM, Samrat Rao <samrat.rao@xxxxxxxxx> wrote: > >> >> Hi, >> >> I am using netCDF-fortran-4.1.1 with netCDF-4.3.2. I get an error 'Bad >> chunk sizes' when the 3D data size is more than a certain number. >> >> I am unable to understand the cause of this error. >> >> My OS is CentOS 6.6. The errors are the same even if is use netCDF (v >> 4.1.1) supplied by the CentOS community. >> >> i am attaching a minimal example. Please let me know if there are any >> errors from my side. >> >> Thanks, >> Samrat. >> >> -- >> >> Samrat Rao >> Research Associate >> Engineering Mechanics Unit >> Jawaharlal Centre for Advanced Scientific Research >> Bangalore - 560064, India >> >> _______________________________________________ >> netcdfgroup mailing list >> netcdfgroup@xxxxxxxxxxxxxxxx >> For list information or to unsubscribe, visit: >> http://www.unidata.ucar.edu/mailing_lists/ >> > > -- Samrat Rao Research Associate Engineering Mechanics Unit Jawaharlal Centre for Advanced Scientific Research Bangalore - 560064, India _______________________________________________ netcdfgroup mailing list netcdfgroup@xxxxxxxxxxxxxxxx For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
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