On Jun 11, 2011, at 09:20, Edward Ned Harvey wrote: > Parity is just a really simple form of error detection. It's not very > useful for error correction. If you look into error correction codes, > you'll see there are many other codes which would be more useful for the > purposes of zfs send datastream integrity on long-term storage.
> These parity files use a forward error correction-style system that can be > used to perform data verification, and allow recovery when data is lost or > corrupted. http://en.wikipedia.org/wiki/Parchive > Because this new approach doesn't benefit from like sized files, it > drastically extends the potiental applications of PAR. Files such as video, > music, and other data can remain in a usable format and still have recovery > data associated with them. > > The technology is based on a 'Reed-Solomon Code' implementation that allows > for recovery of any 'X' real data-blocks for 'X' parity data-blocks present. http://parchive.sourceforge.net/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
