I have a Mat with large numbe of cols and rows.
Like 1000 cols and several million rows.

When I write this information to the disk...
e.g.
FileStorage [[FileStorage]] fs2(tmp.c_str(), FileStorage::WRITE); [[FileStorage]]::WRITE);
fs2 << "training_descriptors" << training_descriptors;
fs2.release();

This keeps writing the information to the disk, then fails with segmentation fault.
gdb shows:

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff761d400 in cvWriteRawData () from /usr/local/lib/libopencv_core.so.2.3
(gdb) where
#0 0x00007ffff761d400 in cvWriteRawData () from /usr/local/lib/libopencv_core.so.2.3
#1 0x00007ffff761df64 in icvWriteMat(CvFileStorage*, char const*, void const*, CvAttrList) [[CvAttrList]])
() from /usr/local/lib/libopencv_core.so.2.3
#2 0x00007ffff761a9b3 in cvWrite () from /usr/local/lib/libopencv_core.so.2.3
#3 0x00007ffff761b3d6 in cv::write(cv::FileStorage&, std::string const&, cv::Mat const&)
() from /usr/local/lib/libopencv_core.so.2.3
#4 0x000000000041034e in operator<< <cv::Mat> (fs=..., value=...)
at /usr/local/include/opencv2/core/operations.hpp:2628
#5 0x0000000000409d93 in make_vocabulary (cfg=0x7fffffffe3c0) at bow.cpp:411
#6 0x000000000040ffd5 in main (argc=29, argv=0x7fffffffe528) at bow.cpp:835
The file grows above 9 GB before failing.

Is this a known limitation? Or simply an error.
I have a 12GB RAM machine.