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Full incremental backup for bind mount?



This is on linux. I have a situation where I want to back up a bind mount, e.g. /x/projects/data and not the actual file system name, e.g. /projects/old/data. Both are listed in /etc/fstab. The actual file system has two directories: /projects/old/data/export, lost+found. The bind mount uses /projects/old/data/export, so lost+found is not accessible from it. I cannot change the actual file system name, though. For testing, up until now, I've been using a domain statement in the stanza as:

domain /projects/old/data

1. Given that the bind mount is listed as a file system in /etc/fstab then should I be able to change the domain statement to ???:

domain /x/projects/data

and simply have it run another full incremental backup wherein it will run a first time full, and then only changes after that? Will it function the same way? Or will it somehow do something goofy and insist on running a partial incremental backup?

2. I will need to back up the lost+found directory separately. I cannot add another bind mount entry for that at this time, however.

Can I simply add a statement in the stanza for that as:


How would I do that?

We've been using domain statements to force TSM to only back up what is specifically enumerated in the stanza. This way, if someone creates a new file system, it won't just get backed up unless we add it. Also, while we're working our way through the first-time fulls, we don't have to have exclude statements to instruct TSM to exclude everything other than what we've added thus far. This makes the domain statement very handy, but I was under the impression that it could only be used for a file system, and /projects/old/data/lost+found is not a file system, only /projects/old/data.

Maybe I'd need something onerous like ???:

domain /x/projects/data
domain /projects/old/data
exclude.dir /projects/old/data/export

So the first one would hit everything under /x/projects/data, which is really everything under export, and the second one would grab everything other than export, due to the exclude, so this would include lost+found, but if anyone added anything else under there at some point later down the road then it would grab that, too?


There was some discussion of this here in terms of problems with bind mounts and the actual file system:


But all of this looks to be further back. We're running 8.1.9 on the client, so maybe all that weirdness was since fixed.

I will try the VIRTUALMOUNTPOINT option suggested by Marclant in my other post (https://adsm.org/forum/index.php?threads/partial-incremental-backup.33090/) as a possible solution to the 'lost+found' path, so something maybe like this:

domain /x/projects/data
virtualmountpoint /projects/old/data/lost+found
domain /projects/old/data/lost+found

I will test and report back.

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The Spectrum Protect TLA (Three-Letter Acronym): ISP or something else?

  • Every product needs a TLA, Let's call it ISP (IBM Spectrum Protect).

    Votes: 18 18.6%
  • Keep using TSM for Spectrum Protect.

    Votes: 59 60.8%
  • Let's be formal and just say Spectrum Protect

    Votes: 12 12.4%
  • Other (please comement)

    Votes: 8 8.2%

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