>>>>> On Wed, 27 Jun 2007 16:55:42 -0400, Chris Hoogendyk said: > > Martin Simmons wrote: > >>>>>> On Wed, 27 Jun 2007 09:46:01 -0400, Chris Hoogendyk said: > >>>>>> > >> Martin Simmons wrote: > >> > >>>>>> Because it is not a bug, it is the way things work. > >>>>>> > >>>>>> > >>>> "... given standard backup algorithms ...." > >>>> > >>>> > >>>> > >>>>>> Many commercial > >>>>>> backup softwares have exactly the same problem. > >>>>>> > >>>>>> >>>>> I would never use or even pay such a backup software. >>>>> >>>>> > >>>> Some of those commercial backup packages run into tens of thousands of > >>>> dollars. There are only a couple I'm aware of which do it the "right way" > >>>> > >>>> Fortunately in bacula, 90% of the work is already done - there is a file > >>>> database in place. It is mainly a matter of hammering out the right > >>>> method > >>>> and cutting code - something I'm afraid I'm no good at. > >>>> > >>>> > >>>> >>>>> Once the GUI is done for the "lazy" people, they will find out that >>>>> bacula is missing a reliable and professional reason. >>>>> >>>>> > >>>> See above. There are very few enterprise-grade packages which can do > >>>> "snapshot" restores via incrementals and they cost a great deal of money. > >>>> > >>>> > >>> Ironically, lots of open source unix backup systems do implement it! > >>> > >>> __Martin > >>> > >> "lots"? > >> > >> for example? > >> > > > > star (http://freshmeat.net/projects/star/) > > dump on Linux > > dump of FreeBSD > > GNU tar (well, it tries, but there are bugs) > > ufsdump on Solaris (OK, this is only recently open source) > > + all the wrapper scripts for the above > > > Ahhh. I see what you mean by "lots." ;-) > > Note that those are all one-off "backup this partition or directory now" > programs. None of them are integrated backup systems like bacula or amanda. > > The list was just talking about "dump" being broken on Linux.
True, but the moved/deleted file tracking is working in dump AFAIK. The problems are just related to backing up a live system, which I think has always been dangerous for dump-like programs on Unix. > GNU tar "tries"? There are various options like --listed-incremental, which work in many cases but have a long history of bugs. > star is a tar variant that has been stuck in 1.5 alpha versions for over > 2 years. I actually found an old star-users email talking about using > star through amanda so they could run unattended. I also found some > discussions on that list arguing that GNU tar actually did work. True, it does always seem to be in alpha :-) > So, we're left with ufsdump on Solaris and any wrapper scripts for it? > And possibly dump on FreeBSD? And maybe GNU tar. > > None of those are integrated backup systems. However, they all plug into > amanda. So, the implication is that amanda works, giving us "lots"=1. > > Any other open source integrated backup systems? I'm sure there are some other wrappers for tar that keep a catalog, though probably not as sophisticated as Bacula or Amanda. > I've never had much call to do full recoveries with incrementals added > on. I guess Sun hardware with mirroring just doesn't fail often enough. > ;-) But, I'm running an experiment right now, trashing a file system > that's my development space just so I can use ufsrestore to do a full > and incremental restore. When it comes to backup and restore, I prefer > hands on experience. > > Ahh, done already. Cool. It worked. Files and directories removed before > the incremental ufsdump were restored by the full ufsrestore and then > removed by the incremental ufsrestore. Files and directories moved > before the incremental ufsdump were restored in their original position > by the full ufsrestore and then moved to their new position by the > incremental ufsrestore. I didn't actually know that that worked before. > Nice to know. 8-) Yes, it is neat. __Martin ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
