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Michael Winiberg wrote:
> Hi,
>
> I realise this has probably been discussed before, but I am wondering
> whether there is yet any
> Way to cope with a dropped connection part way through a backup? I am
> backing up some remote machines with bacula 2.2.8 (to disk, not tape).
> I've reduced the stuff to be backed up to the absolute minimum, but it
> still comes to about 4Gb for a full backup (which takes about 24 hours
> over a 512K link). However, as it is rare for the link to stay up for
> that long, I regularly get 3.999999999Gb failed backups. Some questions
> therefore arise:
>
> 1. Is it possible to access the files that were backed up before the
> link failed? I can't seem to find a way to do so, but the disk space is
> certainly occupied! This is also annoying because, even though the full
> backup failed, the next series of incremental backups runs as normal, ie
> bacula doesn't seem to realise that there isn't a full backup in the
> catalogue, until you try to restore something of course! The catalogue
> reports the number of files and space taken by the failed job, but won't
> allow you to list or restore them.
>
> 2. Is there any way to resume a backup from where it left off (or is
> there likely to be?) From my point of view it would be quite acceptable
> to have an option to suspend all backup activity until the link could be
> re-established so that there was no problem with files getting
> intermixed. Alternatively one could store the current state of the
> backup at the client end, add all files successfully transferred so far
> to the catalogue (to save wasting the effort expended so far) and then
> get the client to restart with the file in which the link was lost once
> the link is re-established. Doing it that way would allow recovery even
> with concurrent backups running. I'm willing to provide some programming
> resource towards doing this if you think it's practical in view of the
> way bacula works internally.
>
> Sorry if I'm reopening a debate or have missed something obvious in the
> most recent release, but this seems to me to be a major failing in this
> otherwise excellent system and I'm willing to help do something about it
> if thought practical...
There presently is not a way to do this. What you could do, I suppose,
is transferring a tar or something like that via other, resumable, means
and then backing that up locally on the machine. There are a lot of ways
to skin that cat.
Note though that no backup system that I know of supports resuming
backups. I know HP's Storage Data Protector/OmniBack did not the last
time I used it (which was not that long ago).
- --
---- _ _ _ _ ___ _ _ _
|Y#| | | |\/| | \ |\ | | |Ryan Novosielski - Systems Programmer II
|$&| |__| | | |__/ | \| _| |novosirj AT umdnj DOT edu - 973/972.0922 (2-0922)
\__/ Univ. of Med. and Dent.|IST/AST - NJMS Medical Science Bldg - C630
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