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on 21 May 2013
This is a handy book for the SQL Server DBA who has questions about the Transaction Log. Areas covered include:

* placement of log files for optimal performance
* virtual log files and how they work
* backup and recovery scenarios
* how to manage the transaction log in the various recovery models
* how do deal with log growth
* monitoring

The book is full of useful scripts and walkthroughs to help you learn what's going on, and there are links to various articles by other authors for more in-depth knowledge.
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on 21 June 2013
This book is part of the Stairway series of books, and as such tackles a narrow subject from the very basics to an expert level. I found that the process of building from simple basics to a more in depth discussion of the technical details was accessible both to those who might have inherited a system and need to know how to properly configure it to minimise risk, and those who have a more detailed understanding.

Whilst this book does tackle data recovery, it is more about prevention and putting yourself in the position of avoiding the disaster in the first place. The process used in this book allows you to take a look at the reasons why you would choose to manage your transaction log in various ways, what implications this might have, and how that might impact upon your service level agreements (time and amount of potential data loss in a disaster) to the business. It deals with why and how to back up the transaction log in order to minimise data loss, and the implications of a corruption or loss of a log backup.

The book has detailed chapters on Full and Bulk Logged recovery modes, and even deals with Simple mode, and the ways in which the transaction log is used in each of them. It also goes through common scenarios (run away growth of a transaction log, disaster recovery, switching modes) to examine the implications and ways forward for each. It also looks at how to optimise your log so that you get the best performance for your intended use of the system, and how to monitor the log to check it is working optimally.

The style of the book is very much that of a taught example, and as such it allows the reasons why a course of action is desirable (or not) to be reinforced with a worked example, and specifies where decisions have been taken that aren't ideal for a production environment.

This is the sort of book I would give to a Junior DBA, to familiarise him or her with why transaction logs are configured as they are, and will keep for my own shelf to remind myself of the more technical details as to what is going on inside SQL Server in various log operations.

I was provided with my review copy free of charge.
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