Messages in this thread | | | Date | Wed, 22 Oct 2008 11:20:24 +0200 | From | Ingo Molnar <> | Subject | Re: [RFC v7][PATCH 0/9] Kernel based checkpoint/restart |
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* Dave Hansen <dave@linux.vnet.ibm.com> wrote:
> On Tue, 2008-10-21 at 12:21 -0700, Andrew Morton wrote: > > On Mon, 20 Oct 2008 01:40:28 -0400 > > Oren Laadan <orenl@cs.columbia.edu> wrote: > > > These patches implement basic checkpoint-restart [CR]. This version > > > (v7) supports basic tasks with simple private memory, and open files > > > (regular files and directories only). > > > > - how useful is this code as it stands in real-world usage? > > Right now, an application must be specifically written to use these > mew system calls. It must be a single process and not share any > resources with other processes. The only file descriptors that may be > open are simple files and may not include sockets or pipes. > > What this means in practice is that it is useful for a simple app > doing computational work.
say a chemistry application doing calculations. Or a raytracer with a large job. Both can take many hours (days!) even on very fast machine and the restrictions on rebootability can hurt in such cases.
You should reach a minimal level of initial practical utility: say some helper tool that allows testers to checkpoint and restore a real PovRay session - without any modification to a stock distro PovRay.
Ingo
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