Hi,Kern,
Do you mean that exactly as you say it, “FD that is more recent that the Dir
and the SD […] is a big problem”?
I thought it was the other way around, that a FD _older_ than dir/SD would
cause problems.
The way you say it here, the FD Bacula Systems provides for community users
would force everyone who wants to add Windows clients to an existing
configuration, to upgrade his dir and SD to 7.0.5.
From: Kern Sibbald [mailto:k...@sibbald.com]
Sent: 13 May 2015 18:13
To: Ian Young; Radosław Korzeniewski
Cc: bacula-users
Subject: Re: [Bacula-users] confused about differentials
We have never had any version of Bacula in which Differential backups were
incomplete. Running with a FD that is more recent that the Dir and the SD or a
Dir and SD that are not identical is a big problem. Until that is fixed it
doesn't make much sense to speculate about any odd behavior. Also, if you are
doing something very unusual in your FileSet or using multiple FileSets in your
backup, there could be a configuration problem or perhaps even an undiscovered
bug, but the first thing to do is correct any possible version problems you
have.
Best regards,
Kern
On 13.05.2015 15:18, Ian Young wrote:
On 13 May 2015, at 07:20, Radosław Korzeniewski
<rados...@korzeniewski.net<mailto:rados...@korzeniewski.net>> wrote:
I appear to be seeing the same problem with CentOS 6 / CentOS 6 combinations:
OS versions doesn't matter. What is important: Bacula Dir/SD vs. File Daemon
versions. The supported configuration require Dir/SD in the same version every
time and FD not newer.
I should have been clearer. I meant that I was apparently seeing the same
problem on at least one setup where the FD, DIR and SD versions were all the
same.
I take your point, though, that the Director/SD should not be older than the
clients, so I need to fix that. Fortunately the (virtual) machine running the
Director and Storage daemons is dedicated to that task, so it should be
relatively easy to build a new CentOS 7 machine to get 5.2.13.
Recommended version in May 2015 is Bacula 7.0.5, not 5.2.13.
I understand that, but deploying 7.0.5 would be significantly harder in my
environment than moving to 5.2.13 so it would be something of a last resort.
I don't think you're saying that I need to move to the latest version to get
reliable backups, are you?
If anyone knew of a bug in 5.2.x (or for that matter in 5.0.x) that caused
differentials to be incomplete, I'd obviously feel differently (but then, I
imagine Red Hat would too, as 5.2.13 is what they are shipping in their most
recent release).
I don't think I actually have a version mismatch problem (as I'm seeing the
same issue with matched versions), but there are all sorts of reasons this
might make my problem go away: there may be a bug in the version of 5.0 shipped
with RHEL/CentOS, or I may have a configuration problem. Either way, starting
from scratch and transitioning clients over may help.
First of all. Did you ever test that it is not working?
As stated, I have seen significant data loss when attempting to restore a
production system. This is not theoretical, although perhaps the subject line
led you astray.
Differential backup does not backup a files which were deleted in the mean
time. So in real system it is very unlikely (it must meet a specific
conditions) you get the same number of files backed up in Incremental and
Differential levels.
I don't believe this is the problem I'm seeing. For example, from my original
mail:
| 9,929 | srv-c701-backup | 2015-05-01 23:05:04 | B | I | 91,030 |
3,450,906,888 | T
| 9,938 | srv-c701-backup | 2015-05-02 23:05:03 | B | D | 112 |
2,184,302 | T
The 91,000 files in job 9929 were NOT all deleted before job 9938 was run, but
do not appear in that job.
-- Ian
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