On Tuesday 26 June 2007 00:53, Frank Sweetser wrote:
> Kern Sibbald wrote:
> > You should read what Linus has to say about dump!  I don't remember his
> > exact words but something to the effect that "yes, it seems to work, but 
if
> > you really understood kernel caching, you would realize that it cannot 
work
> > and that one day you will get burned."  That's paraphrased.  By the way,
> > aside
> 
> It sounds like you're talking about this quote from Linus, regarding the 
fact
> that dump works by reading the underlying device rather than going through 
the
> filesystem API of the kernel:
> 
> >> Note that dump simply won't work reliably at all even in 2.4.x: the 
> >> buffer cache and the page cache (where all the actual data is) are not 
> >> coherent. This is only going to get even worse in 2.5.x, when the 
> >> directories are moved into the page cache as well.
> >> 
> >> So anybody who depends on "dump" getting backups right is already playing
> >> Russian roulette with their backups.  It's not at all guaranteed to get
> >> the right results - you may end up having stale data in the buffer cache
> >> that ends up being "backed up".
> >> 
> >> Dump was a stupid program in the first place. Leave it behind.
> 
> 

Yes, that is the quote. Thanks.

> 
> > from tar, dump is the major component of Amanda :-)  I wonder when the
> > Zmanda VCs will realize that they spent $13 million for dump technology
> > that Linus says is destined to break :-)  amusing (at least to me).
> 
> More fodder for a Bacula vs other programs page... =)
> 
> -- 
> Frank Sweetser fs at wpi.edu  |  For every problem, there is a solution that
> WPI Network Engineer          |  is simple, elegant, and wrong. - HL Mencken
>     GPG fingerprint = 6174 1257 129E 0D21 D8D4  E8A3 8E39 29E3 E2E8 8CEC
> 

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