Hugo Kornelis (6/8/2010)
Good question, Paul!In your explanation, you write that log backups are about the same size as when full recovery had been uses. This matches my expectation, but in Books Online, it says:
"The tradeoffs are bigger log backups and (...)"
ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.en/udb9/html/8cfea566-8f89-4581-b30d-c53f1f2c79eb.htm
Is this a documentation bug?
Hey Hugo - in the majority of cases I've seen, the log backups are a little smaller. I can easily think of cases where they'd be a bit larger (e.g. with a 5000-byte row, meaning 3000 bytes of wasted space per page being propagated into the backup - which wouldn't happen with regular logging. I would say that's a doc bug, yes.
Paul Randal
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Blog:www.SQLskills.com/blogs/paul Twitter: @PaulRandal
SQL MVP, Microsoft RD, Contributing Editor of TechNet Magazine
Author of DBCC CHECKDB/repair (and other Storage Engine) code of SQL Server 2005