Re: [Bacula-users] confused about differentials

[Kern Sibbald]

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> 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 ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users

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