Re: [rdiff-backup-users] CRC checksum and other "minor" errors

[dean gaudet]

On Tue, 1 Feb 2005, Paul Smith wrote:

> I'm frustrated with the fact that rdiff-backup will halt when it hits a CRC
> checksum error, most often due to a source file changing during its backup.

hmm do you have the backtrace?  i don't experience this problem myself -- 
in fact i have no problem with a fair amount of fs churn... see below. 
this happens only on my root filesystem where i don't have LVM (for 
simplicity) and so i can't use a snapshot to back it up.  on my other 
partitions i use LVM snapshots to stablise the image for rdiff-backup...

if you have any filesystem or volume manager snapshot capability i'd look 
into using it.

-dean

UpdateError var/account/pacct Updated mirror temp file 
root/var/account/rdiff-backup.tmp.249 does not match source
UpdateError var/log/maillog Updated mirror temp file 
root/var/log/rdiff-backup.tmp.297 does not match source
UpdateError var/log/messages Updated mirror temp file 
root/var/log/rdiff-backup.tmp.301 does not match source
UpdateError var/log/ntpstats/peerstats Updated mirror temp file 
root/var/log/ntpstats/rdiff-backup.tmp.326 does not match source
UpdateError var/log/ntpstats/peerstats.20050201 Updated mirror temp file 
root/var/log/ntpstats/rdiff-backup.tmp.329 does not match source
UpdateError var/log/secure Updated mirror temp file 
root/var/log/rdiff-backup.tmp.330 does not match source
UpdateError var/log/sysstat/sa01 Updated mirror temp file 
root/var/log/sysstat/rdiff-backup.tmp.333 does not match source
UpdateError var/log/temperature Updated mirror temp file 
root/var/log/rdiff-backup.tmp.338 does not match source
UpdateError var/qmail/queue/info/12/181620 File changed from regular file 
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> This is not uncommon with certain large files on our system. Since I'm backing
> up large volumes, I'd rather the backup continue past this and other "minor"
> errors (i.e., errors related to a single file) so that as much of the volume
> is backed-up as possible. As it is now, the whole thing aborts, even if it's
> only a fraction of the way through. I'm not sure what the "right" solution is
> here. Maybe each file that fails is pushed into a stack that is reported at
> the end, and I can decide how to handle them later. Maybe a flag can be set to
> ignore checksum errors specifically. At a minimum, I'd like a command-line
> option to not halt on (at least) checksum errors.
> 
> -Paul
> 
> --
> Paul Smith            Center for Neighborhood Technology
> http://www.cnt.org    Chicago, IL
> 
> 
> 
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