In our application, we are writing simple HDF5 files to store images. On Windows platform, the operation system tries to buffer the files in memory, and it becomes inefficient when writing a lot of HDF5 files sequentially.
Looking at the HDF5 documentation, it seems like that we would be better off using the unbuffered drivers such as H5FD_DIRECT or H5FD_SEC2 (http://www.hdfgroup.org/HDF5/doc1.6/UG/08_TheFile.html). We tried to set up the calls for SEC2 using C++ API, reference (http://www.hdfgroup.org/HDF5/doc/cpplus_RM/classH5_1_1FileAccPropList.html). However, it does not seem to have any effect, when setSec2() was called. Am I understanding things right? Can I avoid operation system buffering at all with HDF5 lib? How can I achieve the best sequential write speed to disk? Thanks a lot! -- View this message in context: http://hdf-forum.184993.n3.nabble.com/Setting-up-unbuffered-I-O-using-HDF5-C-API-tp3599999p3599999.html Sent from the hdf-forum mailing list archive at Nabble.com. _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org
