On Thu, Dec 09, 2010 at 12:35:46AM -0500, Jeffrey J. Kosowsky wrote:
> Jeffrey J. Kosowsky wrote at about 13:58:28 -0500 on Tuesday, December 7,
> 2010:
> > Robin Lee Powell wrote at about 15:40:04 -0800 on Monday, December 6, 2010:
> > > This is *fascinating*.
> > >
> > > >From the actually-fixing-stuff part of the run, I get:
> > >
> > > ERROR:
> "tm50-s00292__nfs/68/f%2f/fshared/fthepoint/fsite_images/f0042/f4097/fMULTI_medium.jpg"
> - Too many links if added to "59c43b51dbdd9031ba54971e359cdcec"
> > >
> > > to which I say "lolwut?" and investigate.
> > >
> > > $ ls -li /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec*
> > > 2159521202 -rw-r----- 31999 backuppc backuppc 76046 Oct 7 08:29
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec
> > > 2670969865 -rw-r----- 31999 backuppc backuppc 76046 Oct 16 15:15
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec_0
> > > 79561977 -rw-r----- 31999 backuppc backuppc 76046 Oct 22 22:07
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec_1
> > > 156369809 -rw-r----- 31999 backuppc backuppc 76046 Oct 31 09:06
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec_2
> > > 3389777838 -rw-r----- 31999 backuppc backuppc 76046 Nov 7 09:10
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec_3
> > > 106188559 -rw-r----- 31999 backuppc backuppc 76046 Nov 13 15:10
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec_4
> > > 247044591 -rw-r----- 31999 backuppc backuppc 76046 Nov 19 17:20
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec_5
> > > 293083240 -rw-r----- 31999 backuppc backuppc 76046 Nov 26 06:14
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec_6
> > > 513555136 -rw-r----- 31999 backuppc backuppc 76046 Dec 1 19:37
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec_7
> > > 52908307 -rw-r----- 7767 backuppc backuppc 76046 Dec 4 10:37
> /backups/cpool/5/9/c/59c43b51dbdd9031ba54971e359cdcec_8
> > > $ ls -li
> /backups/pc/tm50-s00292__nfs/68/f%2f/fshared/fthepoint/fsite_images/f0042/f4097/fMULTI_medium.jpg
> 374791856 -rw-r----- 1 backuppc backuppc 76046 Dec 4 08:03
> /backups/pc/tm50-s00292__nfs/68/f%2f/fshared/fthepoint/fsite_images/f0042/f4097/fMULTI_medium.jpg
> > >
> > > That's a bunch of files with *thirty two thousand* hard links.
> > > Apparently that's a limit of some kind. BackupPC handles this by
> > > adding new copies, a hack that BackupPC_fixLinks is apparently
> > > unaware of.
> >
> > BackupPC_fixLinks does know about the limit and in fact is careful not
> > to exceed it (using the same hack) when it combines/rewrites links.
> > Other than that, I'm not sure where you think BackupPC_fixLinks needs
> > to be aware of it?
> >
> > To be fair, since I don't have any systems with that many hard links,
> > I have not tested that use case so perhaps my code is missing
> > something (I haven't looked through the logic of how BackupPC_fixLinks
> > traverses chains in a while so maybe there is something there that
> > needs to be adjusted for your use case but again since I haven't
> > encountered it I probably have not given it enough thought)
> >
>
> Robin, can you let me know in what way you think BackupPC misses
> here? It seems to me that my program does the following:
>
> 1. It avoids calling a pool element a duplicate if the sum of the
> number of links in the duplicates exceeds the maximum link number
> (i.e. the pool duplicate is justified)
>
> 2. When it fixes/combines links, it avoids exceeding the maximum
> link number and creates a new element of the md5sum chain instead.
>
> Is there any other way that maxlinks comes into play that I am
> missing?
*blink*
I was under the impression that it did *not* do "creates a new
element of the md5sum chain instead.".
I took the error to mean "I see too many links to this file already,
so screw it, I'm giving up and leaving this file alone".
If the file *does* get linked in despite the error, then yeah,
that's totally fine, although I'd change the wording. I read "Too
many links if added" to mean "so I'm not going to add it".
-Robin
--
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Lojban (http://www.lojban.org/): The language in which "this parrot
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