Re: Checkpoint/Restart mini-summit

[Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>]

Eric W. Biederman wrote:
> Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org> writes:
> 
>> Hi all,
>>
>> Here is a proposition a more detailed agenda for the checkpoint/restart 
>> mini-summit. If everybody is ok with it, I will update the wiki.
>>
>> Comments are welcome :)
> 
> A reading list is useful, even to help get some ideas circulating
> before we get there.
> 
> Ultimately the technical details will need to be resolve by
> people discussing things and sending patches back and forth
> on the mailing lists.
> 
> I don't think a detailed agenda is going to get us anywhere.
> Especially not one focused on the implementation details.
> 
> I think we need to start by seeing what we can agree on.  Certainly we
> agree that checkpoint/restart needs to be part of the picture.  What
> are the problems that the linux community can solve with
> checkpoint/restart.
> 
> Then we need to talk about what kind of implementation we want to
> merge into mainline.  How do we sell it, and how do we implement
> it without affecting long term maintainability.
> 
> I think the granularity of our operations, and what state we
> save is important.  I don't think how we save it is important
> unless it affects one of our requirements.
> 
> As for the posix draft and the historical Cray & SGI implementations.
> They were on the wrong track.  The did not have namespace support
> so they could not in general restore their checkpoints.
> 
> There are also a lot of things you have failed to touch on, that
> I'm not going to go into now.
> 
> With any luck the mini-summit before OLS will be the start of a
> conversation that will go on all week, and continue on the mailing
> lists.
> 
> The real question is how do we coordinate our efforts to build a good
> linux checkpoint/restart implementation.
> 
>> * Documentation
>>    * Zap : www.ncl.cs.columbia.edu/publications/usenix2007_fordist.pdf
>>    * Metacluster : lxc.sourceforge.net/doc/ols2006/lxc-ols2006.pdf
>>    * OpenVZ : http://wiki.openvz.org/Checkpointing_and_live_migration
>>    * Checkpoint/Restart technology : 
>> http://en.wikipedia.org/wiki/Application_checkpointing
>>    * Virtual Servers and Checkpoint/Restart in Mainstream Linux : Sigops 
>> document
> 
> There is also the classic emacs undump.
> The very simple vmadump from bproc.

Thanks Eric for all your comments. I agree the agenda is a little big, I 
will reduce it and I will add the points you raised. I have other points 
from by Oren I will add too, perhaps that will cover more aspect of the 
discussion.

   -- Daniel