David Magda wrote: > On Feb 24, 2008, at 01:49, Jonathan Loran wrote: > >> In some circles, CDP is big business. It would be a great ZFS offering. > > ZFS doesn't have it built-in, but AVS made be an option in some cases: > > http://opensolaris.org/os/project/avs/
Point in time copy (as AVS offers) is not the same thing as CDP. When you snapshot data as in point in time copies, you predict the future, knowing the time slice at which your data will be needed. Continuous data protection is based on the premise that you don't have a clue ahead of time which point in time you want to recover to. Essentially, for CDP, you need to save every storage block that has ever been written, so you can put them back in place if you so desire. Anyone else on the list think it is worthwhile adding CDP to the ZFS list of capabilities? It causes space management issues, but it's an interesting, useful idea. Jon _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
