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The Rambling DBA: Jonathan Kehayias

The random ramblings and rantings of frazzled SQL Server DBA

Want to know how SQL Server logging works?

Have you ever wondered why SQL Server logging works the way it does?  While I have long understood the importance behind the SQL Server Transaction Log, I have never actually understood exactly why it works the way it does, despite having attended Paul Randal’s (Blog/Twitter) session at PASS Summit last year.  Over the last few months I have been working on writing a book on troubleshooting the most common problems that I see asked on the forums, and as a part of that I have been digging into the way that the SQL Server Transaction Log works.

It’s not really a secret that SQL Server implements the Write-Ahead Logging protocol.  This is documented in the Books Online topic, Write-Ahead Transaction Log, but there’s a lot more behind the subject than is actually covered in the BOL topic.  If you are up for some interesting reading, I’d recommend grabbing a copy of the “ARIES: A Transaction Recovery method Supporting Fine-Granularity Locking and Partial Rollbacks Using Write-Ahead Logging” paper by Chunder Mohan. 

Published Wednesday, March 17, 2010 2:09 AM by Jonathan Kehayias



Luis Cardenas said:

I want to know about the book when it is done!!

March 22, 2010 12:53 PM
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