Date: Mon, 20 Oct 2003 15:00:52 -0700 From: Sam Leffler <sam@errno.com> To: Kip Macy <kmacy@fsmware.com>, hackers@freebsd.org Subject: Re: process checkpoint restore facility now in DragonFly BSD Message-ID: <200310201500.53053.sam@errno.com> In-Reply-To: <20031020134532.B63978@demos.bsdclusters.com> References: <20031020134532.B63978@demos.bsdclusters.com>
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I've lived through several checkpointing implementations. You've got the easy part. Applications must participate or such a facility has very limited usefulness. Delivering a signal is only part of the problem; there tend to be issues synchronizing user-mode checkpoint of application state with the kernel's desired to stop the process and squirrel away state. There's lots of stuff published about this; check the literature. Sam
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