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Backups


Backups

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kapfundestanley
kapfundestanley
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Comments posted to this topic are about the item Backups

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zerko
zerko
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http://msdn.microsoft.com/en-us/library/ms190190.aspx - Back Up and Restore of System Databases -
The linked document states "You cannot backup the tempdb system database."

Ermm
I guess you could read that as "why are you wasting your time trying to back up tempdb when by design, everything on it will be permanently discarded when the server instance shuts down?",

Crying
but in this instance I interpreted it as "You cannot backup the tempdb system database, differential or otherwise."

sigh, -1
Henrico Bekker
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2 correct answers to this question.
master & tempdb....although I know you cant backup the tempdb in any method.

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M&M
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I got this wrong as I selected the most evident answer :-)

M&M
Michael Riemer
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Agree with most that TempDB is also a correct answer, but I guess that was the trick they were trying to catch! ;-)
Hugo Kornelis
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Okay, I was unaware of this limitation (though I have no idea why anyone would ever even WANT to do a differential backup on master!), so I guess I learned something.
But the phrasing of the question is poor. I assume the intention was to ask which system database can be backed up full but not differential, but the phrasing only included the inability of differential backups. And that means that tempdb is a valid answer as well, since tempdb doesn't allow backups of any kind.

Steve, if you're reading this - my suggestion is to change the wording of the question to "Which of the following system databases does allow full backups, bot does not allow differential backups."


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Nakul Vachhrajani
Nakul Vachhrajani
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Hugo Kornelis (5/29/2012)
Okay, I was unaware of this limitation (though I have no idea why anyone would ever even WANT to do a differential backup on master!), so I guess I learned something.
But the phrasing of the question is poor. I assume the intention was to ask which system database can be backed up full but not differential, but the phrasing only included the inability of differential backups. And that means that tempdb is a valid answer as well, since tempdb doesn't allow backups of any kind.

Steve, if you're reading this - my suggestion is to change the wording of the question to "Which of the following system databases does allow full backups, bot does not allow differential backups."



I agree with Hugo. The way the question is worded right now, tempdb should have been part of the answer.

By the way, I learnt today that differential database backups not being allowed on the master database. So, thank-you for that.

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davoscollective
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I'm not sure if a page at simple-talk from 2006 qualifies as a good reference, although BOL has its fair share of errors anyway so probably not worth worrying about.
skanker
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I chose TempDB so got it wrong (although this is still also right in my opinion). Did not realise this about Master so learned something this morning which is always a good way to start the day.
Hugo Kornelis
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davoscollective (5/29/2012)
I'm not sure if a page at simple-talk from 2006 qualifies as a good reference, although BOL has its fair share of errors anyway so probably not worth worrying about.

I had the same concern, so I tested it (on SQL2012). I did indeed get an error message when trying to do a differential backup of master. (And I also got an error message when trying the same on tempdb). Note that I did not test if the other databases do indeed allow the differential backup.


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