BackupPC-users

Re: [BackupPC-users] Slow backup

2010-11-04 10:09:09
Subject: Re: [BackupPC-users] Slow backup
From: Andrea Visinoni <a.visinoni AT autron DOT it>
To: "General list for user discussion, questions and support" <backuppc-users AT lists.sourceforge DOT net>
Date: Thu, 04 Nov 2010 15:06:46 +0100
I tried IncrLevels setting but this didn't affect the weekly full backup 
that still takes 1859 minutes!
Any hints?

Andrea

Il 14/10/2010 18.24, Tyler J. Wagner ha scritto:
> What is your IncrLevels setting? I bet you a donut that it is "1", which
> means each incremental references the last full. So over time, more and
> more files have changed from the last full.
>
> Try setting IncrLevels to "1, 2, 3, 4, 5, 6". This means each
> incremental will only back up files changed since the last incremental.
>
> Regards,
> Tyler
>
> On Thu, 2010-10-14 at 15:03 +0200, Andrea Visinoni wrote:
>> On a brand new Dell server with RAID5 SAS disk configuration we get this
>> backup results...and slowing down through time.
>> The backup is local, from the server disk to the server disk.
>> Changing compression level doesn't give results.
>>
>> Any Hints?
>>
>> Andrea
>>
>> Backup Summary
>> Click on the backup number to browse and restore backup files.
>>
>> Backup#  Type  Filled  Level  Start Date  Duration/mins  Age/days Server
>> Backup Path
>> 20  full  yes  0  10/6 02:00  1859.4  8.3  /home/backuppc/pc/localhost/20
>> 21  incr  no  1  10/7 20:00  16.9  6.5  /home/backuppc/pc/localhost/21
>> 22  incr  no  1  10/8 20:00  24.2  5.5  /home/backuppc/pc/localhost/22
>> 23  incr  no  1  10/9 20:00  24.4  4.5  /home/backuppc/pc/localhost/23
>> 24  incr  no  1  10/10 20:00  24.5  3.5  /home/backuppc/pc/localhost/24
>> 25  incr  no  1  10/11 20:00  33.2  2.5  /home/backuppc/pc/localhost/25
>> 26  incr  no  1  10/12 20:00  42.4  1.5  /home/backuppc/pc/localhost/26
>>
>> Xfer Error Summary
>>
>>
>> Backup#  Type  View  #Xfer errs  #bad files  #bad share  #tar errs
>> 20  full  XferLOG, Errors  1  0  0  0
>> 21  incr  XferLOG, Errors  0  0  0  0
>> 22  incr  XferLOG, Errors  0  0  0  0
>> 23  incr  XferLOG, Errors  0  0  0  0
>> 24  incr  XferLOG, Errors  0  0  0  0
>> 25  incr  XferLOG, Errors  0  0  0  0
>> 26  incr  XferLOG, Errors  0  0  0  0
>>
>> File Size/Count Reuse Summary
>> Existing files are those already in the pool; new files are those added
>> to the pool. Empty files and SMB errors aren't counted in the reuse and
>> new counts.
>>
>> Totals  Existing Files  New Files
>> Backup#  Type  #Files  Size/MB  MB/sec  #Files  Size/MB  #Files  Size/MB
>> 20  full  171785  36906.0  0.33  171511  36839.2  339  67.8
>> 21  incr  600  151.5  0.15  168  25.5  538  126.1
>> 22  incr  841  197.8  0.14  628  146.8  263  51.2
>> 23  incr  841  197.8  0.14  841  197.8  2  0.0
>> 24  incr  841  197.8  0.13  841  197.8  2  0.0
>> 25  incr  1109  261.0  0.13  889  201.3  275  59.9
>> 26  incr  1365  327.0  0.13  1142  263.0  273  64.1
>>
>> Compression Summary
>> Compression performance for files already in the pool and newly
>> compressed files.
>>
>> Existing Files  New Files
>> Backup#  Type  Comp Level  Size/MB  Comp/MB  Comp  Size/MB  Comp/MB  Comp
>> 20  full  3  36839.2  10261.3  72.1%  67.8  12.9  80.9%
>> 21  incr  3  25.5  6.9  72.8%  126.1  16.5  86.9%
>> 22  incr  3  146.8  21.8  85.1%  51.2  7.9  84.5%
>> 23  incr  3  197.8  29.7  85.0%  0.0  0.0  44.1%
>> 24  incr  3  197.8  29.7  85.0%  0.0  0.0  44.0%
>> 25  incr  3  201.3  29.9  85.2%  59.9  8.5  85.8%
>> 26  incr  3  263.0  38.5  85.4%  64.1  9.4  85.3%
>>
>>
>> caronte:/etc/backuppc# cat localhost.pl
>> #
>> # Local server backup of /etc as user backuppc
>> #
>> $Conf{XferMethod} = 'tar';
>>
>> $Conf{TarShareName} = ['/etc', '/home/users', '/home/pub',
>> '/home/utente', '/roo
>> t'];
>>
>> $Conf{TarClientCmd} = '/usr/bin/env LC_ALL=C /usr/bin/sudo $tarPath -c
>> -v -f - -
>> C $shareName'
>>                          . ' --totals';
>>
>> # remove extra shell escapes ($fileList+ etc.) that are
>> # needed for remote backups but may break local ones
>> $Conf{TarFullArgs} = '$fileList';
>> $Conf{TarIncrArgs} = '--newer=$incrDate $fileList';
>>
>> # Livello minimo di compressione dei files
>> $Conf{CompressLevel} = 3
>> caronte:/etc/backuppc#
>>
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>>
>
> --
> "A competent and self-confident person is incapable of jealousy in
> anything. Jealousy is invariably a symptom of neurotic insecurity."
>     -- Lazarus Long, "Time Enough for Love", by Robert A. Heinlein
>


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