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Thanks, I think that's the answer. Fortunately, for NxM files, I can alternatively open just one file at a time to get the initial info that I need, and then use the HDF5 interface to read data from one file at a time (HDF5 seems to open/close much faster than netcdf4).
-- Ted On Sep 7, 2010, at 1:10 PM, Gregory Sjaardema wrote:
There is a sysconf call that can give you the maximum number of open files supported on the current system. The call is: "sysconf(_SC_OPEN_MAX)" which will return either the maximum number of simultaneously open files (including stdout, stderr, and stdin) or if it returns -1, then the maximum is unlimited.My guess is that your OSX is limiting you to 256. --Greg On 9/7/10 9:53 AM, Ted Mansell wrote:Howdy,I'm using netcdf4.1.2-beta1, and I get the error "Too many open files"upon trying to open the 254th file (out of 616). This is on OS X (10.5), and the first time I've pushed it that far on this platform.On an ia64 machine, however, I've been able to open all 616 files (thesame files I'm trying to open under OS X; not sure which version of netcdf4 I'm using on the ia64 system). Is there a setting somewhere for the max number of open files? Is this an error that comes from HDF5? I've looked through the online docs and even searched through netcdf code, and I don't even see where the error value is even used (only checked for in error.c). The application is compiled with 64-bit memory access, and does not appear to be running out of memory (less than 1.5GB when it quits). Thanks for any help... By the way, the netcdf.inc file defines ncenfile = -31, but it is NC_ENFILE = -34 in the C code. -- Ted _______________________________________________ netcdf-hdf mailing list netcdf-hdf@xxxxxxxxxxxxxxxx For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/_______________________________________________ netcdf-hdf mailing list netcdf-hdf@xxxxxxxxxxxxxxxx For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
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