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Re: [Bacula-devel] Accurate Incremental backup problem


Hello,


On Wednesday 24 September 2008 13:34:53 Kern Sibbald wrote:
> Hello,
>
> On Wednesday 24 September 2008 11:52:41 Ulrich Leodolter wrote:
> > Hi,
> >
> > I looks like Accurate Incremental backups work not like expected.
> >
> > I am using current bacula trunk, last update 2008-09-16.
> > No config changes since last update.
> >
> > Below is a Job list where i tried to track down the problem.
> > On Monday Sep 22 i did a system update (apt-get), so 20794 Files are ok
> > for Job 3637. But i did not make major changes on Sep 23, so 21725 Files
> > for Job 3669 are not expected!
> >
> >
> > JobId JobName Status Level Client Pool StartTime EndTime Duration Files
> > Bytes 3574 Backup-leodolter OK F leodolter-fd DiskBackup 08-Sep-21 02:05
> > 08-Sep-21 02:26 00:21:45 178,917   4.5 GB 3605 Backup-leodolter OK I
> > leodolter-fd DiskBackup 08-Sep-22 02:05 08-Sep-22 02:06 00:01:27     202
> > 13.3 MB 3637 Backup-leodolter OK I leodolter-fd DiskBackup 08-Sep-23
> > 02:05 08-Sep-23 02:07 00:02:34  20,794 187.6 MB 3669 Backup-leodolter OK
> > I leodolter-fd DiskBackup 08-Sep-24 02:05 08-Sep-24 02:07 00:02:42 
> > 21,725 192.6 MB
> >
> >
> > Now i looked at some special file /usr/bin/wget (see mysql select below)
> > As far as i can see only st_atime (11'th field in LStat) changed from 23
> > Sep (JobId 3637) to 24 Sep (JobId 3669).
> >
> > Until now i thought st_atime is not used for Accurate backups.
>
> To the best of my knowledge, st_atime is not used by Bacula to make any
> decision whether or not to backup the file.  The tests are strictly against
> st_mtime and st_ctime (depending on how you configure Bacula).
>
> It sounds to me like you have a problem of an anti-virus program that
> is "touching" some files or some other change to your system happened.
> Running verify InitCatalog, then later Catalog can verify this ...
>
> > For me i looks like Accurate Incremental backups are always made against
> > last Full while ignoring previous Accurate Incremental jobs (maybe i am
> > completely wrong)
>
> I haven't taken a careful look at all the details you presented above, but
> Accurate works very much like existing backups -- that is it looks at
> st_mtime and st_ctime (if I am not mistaken), and if the file needs to be
> backed up for the "normal" backup reasons, it will be.  What Accurate does
> is in *addition* to the "normal" rules, it will check to see if a file has
> been deleted or has been added with an old date, and in those cases, it
> ensures that files that are deleted are so marked, and any file that is
> missed by the normal backup will also be backed up.
>
> I'll let Eric confirm this.

I confirm :)

Ulrich, you can try to run the the FD at debuglevel 200, and you will see why
the file has been backuped.

Bye

> If it is not working like I described above, then please let me know and we
> can look at it in more details.
>
> Best regards,
>
> Kern
>
> > mysql> select File.JobId, Filename.Name,Path.Path,File.LStat,File.MD5
> > from File join Filename using (FilenameId)
> >   join Path using (PathId)
> >  where File.JobId in (3574,3605,3637,3669) and Filename.Name = 'wget';
> >
> > +-------+------+-----------+---------------------------------------------
> >-- -------------+-----------------------------+
> >
> > | JobId | Name | Path      | LStat
> > |
> > |             | MD5                         |
> >
> > +-------+------+-----------+---------------------------------------------
> >-- -------------+-----------------------------+
> >
> > |  3574 | wget | /usr/bin/ | P4A HEEh IHt B A A A 3PU BAA HI BIz28l
> > | BIaVNu BIfhPi A A E | 8dz2rHajxE25WMWnQ2U6DUja/MI | 3637 | wget |
> > | /usr/bin/ | P4A HECd IHt B A A A 3PU BAA HI BI2CXZ BIxGDt BI11Hr A A E
> > | |
> > | FyVUN2j34bKjITbKF5khOovbiGs | 3669 | wget | /usr/bin/ | P4A HECd IHt B
> > | A A A 3PU BAA HI BI2DL7 BIxGDt BI11Hr A A E |
> > | FyVUN2j34bKjITbKF5khOovbiGs |
> >
> > +-------+------+-----------+---------------------------------------------
> >-- -------------+-----------------------------+ 3 rows in set (0.00 sec)
> >
> >
> > Please have a look at this
> > Thanks



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