Bacula-users

Re: [Bacula-users] Windows client always backs up zero byte files and empty directories

2014-09-22 17:47:53
Subject: Re: [Bacula-users] Windows client always backs up zero byte files and empty directories
From: Dan Ragle <daniel AT Biblestuph DOT com>
To: bacula-users AT lists.sourceforge DOT net
Date: Mon, 22 Sep 2014 17:42:19 -0400
>>>>>>> On Thu, 18 Sep 2014 20:44:51 -0400, Dan Ragle said:
>>>
>>> Think I'm missing something in my setup here, but don't know what.
>>>
>>> I'm running director and sd version 7.0.5 on a CentOS box, and backing
>>> up (among others) a Windows Vista Home Premium client (which is running
>>> 5.2.10). I'm finding that the incremental saves for the Windows client
>>> ALWAYS include all the empty directories and zero-byte files, whether
>>> they've changed or not.
>>>
>>> Looking at the bat/brestore console, I can see for example that a
>>> certain zero-byte file is listed in every incremental backup, and that
>>> it has the same date and Chksum in every entry.
>>>
>>> I'm using accurate mode backups, with accurate=pinsmc1:
>>>
>>> FileSet {
>>>      Name = Windows
>>>      Include {
>>>        Options {
>>>          compression=GZIP
>>>          signature=SHA1
>>>          accurate=pinsmc1
>>>          checkfilechanges=yes
>>>        }
>>> ...
>>>
>>> with the includes and excludes pretty normal (a few * wildcards in the
>>> excludes, but nothing fancy). I'm also backing up a few Linux clients
>>> and a MacOS client with the same director and not noticing this behavior
>>> with those (two of the linux clients are 7.0.5, and the other one as
>>> well as the Mac client is 5.2.6).
>>>
>>> Anything obvious jumping out at anybody? I can provide more info if
>>> needed, but figured I'd start with some basics.
>>
>> You could try setting the debug level to 100 in the client (setdebug
>> client=Windows level=100 trace=1) to see what it is comparing.
>>
>> You could also look at the lstat column for those files in the file table to
>> see what differs (see .bvfs_decode_lstat at
>> http://www.bacula.org/7.0.x-manuals/en/main/New_Features_in_7_0_0.html#SECTION003129000000000000000).
>>
>> __Martin
>>
>
> Thanks, Martin. I'll try the setdebug on tonight's backup and see what
> comes of it.
>
> In the meantime, I'm not sure if the .bvfs commands will shed any new
> light on the issue, since the file simply shows the same lstat on each
> backup:
>
> * .bvfs_versions client=joshua-fd pathid=19570 fnid=36065 jobid=76
> 19570   36065   503052  16      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Full_0016       0
> 19570   36065   561670  22      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0022        0
> 19570   36065   587296  28      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0028        0
> 19570   36065   590294  34      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0034        0
> 19570   36065   595122  40      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0040        0
> 19570   36065   605010  46      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0046        0
> 19570   36065   606812  52      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0052        0
> 19570   36065   609242  60      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0058        0
> 19570   36065   614435  66      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0063        0
> 19570   36065   615289  70      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0067        0
> 19570   36065   617073  76      A A IH/ B A A A A A A BJ7e3Q BJ7e3Q
> BJ7e3Q A A MwUJerN1ZDJwRrMXpKcXmVly9OL8     Inc_0073        0
>
> * bvfs_decode_lstat lstat="A A IH/ B A A A A A A BJ7e3Q BJ7e3Q BJ7e3Q A A"
> st_nlink=1
> st_mode=33279
> st_uid=0
> st_gid=0
> st_size=0
> st_blocks=0
> st_ino=0
> st_ctime=1240329680
> st_mtime=1240329680
> st_mtime=1240329680
> st_dev=0
> LinkFI=0
>

Ok, so presumably it's the SHA1 chksum that it doesn't like:

joshua-fd: filed/accurate.c:236-0 add 
fname=<C:/Users/Dan/Perl/from_linux/comments/block/block_ip.txt> lstat=A 
A IH/ B A A A A A A BJ7e3Q BJ7e3Q BJ7e3Q A A M  delta_seq=0 
chksum=wUJerN1ZDJwRrMXpKcXmVly9OL8

...

joshua-fd: filed/accurate.c:82-0 lookup 
<C:/Users/Dan/Perl/from_linux/comments/block/block_ip.txt> ok
joshua-fd: filed/verify.c:297-0 === digest_file
joshua-fd: filed/accurate.c:453-0 
C:/Users/Dan/Perl/from_linux/comments/block/block_ip.txt      SHA1 
chksum  diff. Cat: wUJerN1ZDJwRrMXpKcXmVly9OL8 File: 
2jmj7l5rSw0yVb/vlWAYkK/YBwk
joshua-fd: findlib/bfile.c:529-0 === NO plugin
joshua-fd: findlib/bfile.c:621-0 Read 
CreateFileW=\\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy21\Users\Dan\Perl\from_linux\comments\block\block_ip.txt

So I guess I'll just try it with MD5's for that client on my next 
scheduled full backup and see what happens after that.

Cheers,

Dan

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