I would like to experiment with SymPy this week, it is a good opportunity to use some python, learn symbolic mathematics and refresh some Maths, starting with the tutorial http://docs.sympy.org/latest/tutorial/index.html and later choosing some of the modules in the official documentation http://docs.sympy.org/latest/index.html.

Currently not published outside of company (that would be also one of the goals).

Nowadays, SSD (fast hard disk) is very popular, but still expensive. Some users want to use some SSD hard disks and some common hard disks to set up a hybrid storage infrastructure, in this case, how does OCFS2 file system utilize these SSD hard disks effectively? so far, we have not any particular optimization, OCFS2 considers these hard disks as one kind of hard disk. So, I want to investigate what we can do in improving OCFS2 under a hybrid storage infrastructure, let OCFS2 be able to aware fast hard disks, and use them more effectively.