On Mon, Mar 09, 2009 at 05:56:36PM +0100, Kern Sibbald wrote:
> On Monday 09 March 2009 17:40:15 Graham Keeling wrote:
> > Hello,
> >
> > I have come across some problems involving a single client, a single
> > fileset, and more than one job definition.
> >
> > My setup...
> >
> > Client: myclient
> > FileSet: myfileset
> >
> > Job: myjob1
> > Job: myjob2
>
> Bacula does not support this option.
I don't believe that this is made very clear in the documentation.
It does appear to be *trying* to support it, as some parts of the code that
figure out dependent jobs take note of the job name, though others do not.
> > myjob1 and myjob2 both backup myclient using myfileset, but the schedules,
> > pools, and storages differ.
> >
> >
> > I run an Incremental backup using myjob1 and wait for it to finish.
> > It gets upgraded to a Full backup:
> > ("No prior or suitable Full backup found in catalog. Doing FULL backup.")
> >
> > I add a file called '/var/log/zzz'.
> > I run an Incremental backup using myjob2 and wait for it to finish.
> > It gets upgraded to a Full backup:
> > ("No prior or suitable Full backup found in catalog. Doing FULL backup.")
> >
> > The fact that they both got upgraded to Full backups indicates that they
> > are independent of each other.
> >
> > I delete the file called '/var/log/zzz'.
> > I run an Incremental backup using myjob1.
> >
> >
> > So, I have:
> >
> > myjob1 | myjob2
> > ------------------
> > 1: Full |
> >
> > | 2: Full (contains '/var/log/zzz')
> >
> > 3: Incr |
> >
> > Now, if I attempt a restore - for example, the most recent backup for a
> > client, bacula chooses JobIds 2 and 3.
> > It should have chosen JobIds 1 and 3.
> >
> > When the storages for myjob1 and myjob2 are different, it
> > then hits the 'cannot restore from multiple storages' problem and the
> > restore job gets stuck 'waiting for a mount request'.
> > When the storages are the same, it happily restores from JobIds 2 and 3,
> > which is logically the wrong thing to do.
> >
> >
> > Since the two initial Full backups distinguished between the defined jobs,
> > and the restore does not, I think this is a bug. So I investigated further.
> >
> > Using 'bls', I found that JobId 3 actually took note of the deletion of
> > '/var/log/zzz'. After looking at the source code, I found that there are at
> > least four different places, using different functions, where it tries to
> > figure out which jobs go together.
> >
> > These are:
> > a) dird/fd_cmds.c: get_level_since_time()
> > This uses cats/sql_find.c: db_find_job_start_time(),
> > which checks the job Name, ClientId, and the FileSet.
> > b) dird/ua_restore.c: select_backup_before_date()
> > This uses SQL commands defined in cats/sql_cmds.c that look at the
> > ClientId, the FileSet and the StartTime.
> > c) dird/backup.c: send_accurate_current_files()
> > dird/vbackup.c: do_vbackup()
> > These both use cats/sql_get.c: db_accurate_get_jobids(),
> > which checks the ClientId, the FileSet and the StartTime.
> >
> > It is logical to me that these should all be checking the job Name.
> >
> > (As an aside: It seems to me that all of this would be much simpler, less
> > error-prone and non-ambiguous if each job recorded the jobId that it was
> > based on in the database)
> >
> > Graham.
> >
> >
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>
>
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