Amanda-Users

Re: Compression again

2007-04-16 10:31:04
Subject: Re: Compression again
From: "Sebastian Henrich" <shss AT gmx DOT de>
To: Jean-Louis Martineau <martineau AT zmanda DOT com>
Date: Mon, 16 Apr 2007 16:25:01 +0200
Mmh, why I'm the only person who ran into these problems?

What should I do now? amanda-2.5.2b1 is in beta phase and I thinks it's no good 
idea to use it in a productional environment. Is there a possible workaround?

Thank for helping me

  Sebastian


>  From the debug file:
>   sendbackup: time 2612.878:  62:    size(|):   DUMP: 17753400 blocks 
> (17337.30MB)
> 
> amanda parse the number of block but it think they are blocks of 512
> bytes.
> 
> This problem is fixed only in amanda-2.5.2b1 (The MB value is used).
> 
> Jean-Louis
> 
> Sebastian Henrich wrote:
> > My OS is openSUSE 10.1.
> >
> > server:~ # tar --version
> > tar (GNU tar) 1.15.1
> >
> > server:~ # dump
> > dump 0.4b41 (using libext2fs 1.38 of 30-Jun-2005)
> >
> > The last dendbackup.*.debug is attached.
> >
> > Thanks
> >
> >    Sebastian
> >
> > At 13:50 13.04.2007, Jean-Louis Martineau wrote:
> >> The orig-kb is the size reported by the backup tool (tar, dump, ...)
> >>
> >> It's possible that amanda doesn't parse the output correctly.
> >>
> >> What's your OS? backup tool?
> >>
> >> Could you post a sendbackup.*.debug file?
> >>
> >> It's probably already fixed in a newer version.
> >>
> >> Jean-Louis
> >>
> >> Sebastian Henrich wrote:
> >>> Here is the result after deleting full-comp und incr-comp.
> >>>
> >>> DUMP SUMMARY:
> >>>                                      DUMPER STATS            TAPER 
> >>> STATS
> >>> HOSTNAME     DISK        L ORIG-kB   OUT-kB COMP% MMM:SS  KB/s
> >>> MMM:SS  KB/s
> >>> -------------------------- ------------------------------------ 
> >>> -------------
> >>> server       /home       0 2229585  2833801 127.1  10:58 4307.9  
> >>> 15:19 3083.2
> >>> server       /profile    0 4557175  4541611  99.7  21:07 3583.6  
> >>> 24:46 3055.3
> >>> server       /daten      0 1221325  1796309 147.1   4:44 6321.5   
> >>> 9:46 3065.4
> >>> server       /intorg     0  188995   199786 105.7   1:22 2427.2   
> >>> 1:07 2971.2
> >>> server       /literatur  0  662255  1051091 158.7   2:36 6737.3   
> >>> 5:39 3097.9
> >>> server       /projekte   0 8876700 11223553 126.4  43:33 4295.4  
> >>> 60:48 3076.9
> >>>
> >>> Once again the data seems to grow while it's written to the tape. 
> >>> But I think I figured out the problem. During the calculation of the 
> >>> estimates everything seems to be ok and all sizes are like the real 
> >>> ones on the disk. The problems start with the dumper. The dumper 
> >>> doesn't compare his result with the real sizes but with the real 
> >>> sizes divided by two because of the default compression set to 0.50. 
> >>> A compression to 50% isn't possible on all the disks and that why 
> >>> the data seems to grow.
> >>>
> >>> My question is now, is this a bug of version 2.4.5? At the moment I 
> >>> don't get packages for openSUSE 10.1 from SuSE or the amanda 
> >>> homepage with the newest version. Perhaps I should try this next?
> >>>
> >>> Thanks again
> >>>
> >>>   Sebastian
> >>>
> >>> At 22:20 12.04.2007, Jean-Louis Martineau wrote:
> >>>> I don't understand.
> >>>>
> >>>> Did you set a 'comprate' in your dumptype? You should remove it.
> >>>> Amanda will learn the compresion ratio after a few run.
> >>>>
> >>>> For all 'info' file, you can remove the value in the 'full-comp' 
> >>>> and 'incr-comp' line.
> >>>>
> >>>> Jean-Louis
> >>>>
> >>>> Sebastian Henrich wrote:
> >>>>> Here is the log.
> >>>>>
> >>>>> Sebastian

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