Editing Application checkpointing (section)

=== DMTCP ===
DMTCP (Distributed MultiThreaded Checkpointing) is a tool for transparently checkpointing the state of an arbitrary group of programs spread across many machines and connected by sockets.<ref>Ansel, J., Arya, K., & Cooperman, G. (2009, May). DMTCP: Transparent checkpointing for cluster computations and the desktop. In Parallel & Distributed Processing, 2009. IPDPS 2009. IEEE International Symposium on (pp. 1-12). IEEE.</ref> It does not modify the user's program or the operating system. Among the applications supported by DMTCP are [[Open MPI]], [[Python (programming language)|Python]], [[Perl]], and many [[programming language]]s and shell scripting languages. With the use of TightVNC, it can also checkpoint and restart X Window applications, as long as they do not use extensions (e.g. no OpenGL or video). Among the Linux features supported by DMTCP are open [[file descriptor]]s, pipes, sockets, signal handlers, process id and thread id virtualization (ensure old pids and tids continue to work upon restart), ptys, fifos, process group ids, session ids, terminal attributes, and [[mmap]]/mprotect (including mmap-based shared memory). DMTCP supports the OFED API for InfiniBand on an experimental basis.<ref>{{Cite web | url=https://github.com/dmtcp/dmtcp/blob/master/contrib/infiniband/README |title =GitHub - DMTCP/DMTCP: DMTCP: Distributed MultiThreaded CheckPointing.|website =[[GitHub]]|date = 2019-07-11}}</ref>