> On Wed, 2 Aug 2006, John Hascall wrote: > >> and yet people still backup raid filesystems. there are certain > >> critical failures that cannot be solved with this solution.
> > And which critical failures would that be? > They're not geographically redundant, for one thing. (but I said they that they were...) > Yes, we hate doing tape backups. No, we haven't given up doing them. > Yes, we'd love to come up with a clever means to get rid of them. > Infinite levels of .backup volumes that we can replicate to > geographically distributed servers might be a solution. > But I'm intrigued by John's idea. It's been a long time since I > read the GFS white paper but I thought I remembered they never actually > physically delete any files. As I mentioned in another message, they do lazy delete, and you schedule when space is reclaimed. It might actually be an interesting idea to extend the lazy-delete idea to simply making a new copy of a chunk everytime it is written -- giving you the ability to go back to any instant in time (until you cleanup the old versions). John _______________________________________________ OpenAFS-devel mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-devel
