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When my trajectory files reach 2GB I get strange error messages, or they just disappear. Why? |
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Friday, 09 September 2005 |
The configure script checks for 64 bit I/O support and enables it if it finds it (i.e. provides support for >2GB files), but this does not work on all platforms. This can also be a problem with the file system; when the system, or the C library, or the compiler, or the NFS implementation (version 2) only uses 32 bits for the file pointer you cannot use files larger than 2GB. On most modern systems there are special compiler flags we set to enable 64-bit file pointers, but there might of course be cases when the autoconfiguration scripts don't detect your system correctly.
In any case, it is probably a good idea to try to keep your files smaller than 2GB. You never know if you later might need to use it over NFS version 2 or on some supercomputer system that doesn't support large files yet.
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