NCMPI

Dahai Guo dhguo at ncsa.uiuc.edu
Tue Aug 4 16:09:04 CDT 2009



Hi, 



for IOR HPC Benchmark,  there is a filesize limitation of 2 GB for PnetCDF as follow. Do you know the reason, or just a bug? How can I test large file IO in IOR with NCMPI (Certainly I can update the code to 1024 )? do I need to set some special environment varibles for it? 



Thanks, 



Dahai 



line 2162 -- 2165 in IOR.c: 


    if ((strcmp(test->api, "NCMPI") == 0) 
        && ((test->numTasks * test->blockSize * test->segmentCount) 
            > (2*(IOR_offset_t)GIBIBYTE))) 
        ERR("file size must be < 2GiB"); 
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