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On Tue, Nov 15, 2005 at 01:15:54PM +0530, Block Device wrote: > Hi,> > does the linux kernel provide a mechanism whereby applications can > register themselves > to be notified when a snapshot is being taken of the volume they might > be writing to. > > If there is no such framework then how do backup applications > guarantee ( application level ) consistency. I have seen freeze_bdev call sync and mount read-only, or go down to init 1. Coywolf > and friends which work for file systems and how the device mapper uses > them. But when it comes to application level consistency, a mechanism > is required to give the application a chance to flush & quiesce its > writes so that the backup taken will be consistent for the application > also. Windows has the VSS ( Volume Shadow Service ) which provides an > elaborate framework for this. Is anyone working on something similar > for Linux and if not why is it not such a worthwhile idea ? > > Regards > BD - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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