Bacula-users

Re: [Bacula-users] force backup of unchanged file in incremental backup

2011-04-14 09:47:42
Subject: Re: [Bacula-users] force backup of unchanged file in incremental backup
From: Thomas Mueller <thomas AT chaschperli DOT ch>
To: Jérôme Blion <jerome.blion AT free DOT fr>
Date: Thu, 14 Apr 2011 15:28:53 +0200
>>> Is there a way to force the backup of specific unchanged files during
> an
>>> incremental or differential backup? Eg:
>>>
>>> Option {
>>>    File = "C:/database/mydb.mdf"
>>>    Always Back Up = Yes
>>> }
>>>
>>
>> you could create a backup job with just that file in it and run it
> always
>> as full.
>>
>> - Thomas
>
> I think his goal is to recreate some differential backups for MSSQL (RMAN
> provides it for Oracle).

you can't do a Differential or Incremental backup of MSSQL data files. 
this would require a FD plugin or another tool.

> To do that, he needs to know which datafiles moved... If you perform a
> touch on each of them, it's not a differential backup but a full one.
>
> Are we sure that all data pieces have been flushed to disk before the VSS
> snapshot occurred ?

yes, MSSQL provides a VSS "Plugin". so MSSQL knows when it has to flush 
to disk.

- Thomas

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