Understanding Understanding Logging & RecoveryLogging & Recovery

What Programmers Always Avoid Until it’s too Late!What Programmers Always Avoid Until it’s too Late!

Kimberly L. Tripp

Principal Mentor, Solid Quality Learning at www.SolidQualityLearning.com

President, SYSolutions, Inc. at www.SQLSkills.com

Email me: Kimberly@SQLSkills.com and Kimberly@SolidQualityLearning.com

Speaker – Kimberly L. TrippSpeaker – Kimberly L. Tripp

Independent Consultant/Trainer/Speaker/Writer President, SYSolutions, Inc. www.SQLSkills.com Principal Mentor, Solid Quality Learning

* In-depth, high quality training around the world! www.SolidQualityLearning.com

SQL Server MVP (http://mvp.support.microsoft.com/) Microsoft Regional Director

(http://www.microsoftregionaldirectors.com/Public/) Writer/Editor for TSQL Solutions/SQL Magazine

www.tsqlsolutions.com and www.sqlmag.com Coauthor for MSPress title: SQL Server 2000 High

Availability Presenter/Technical Manager for SQL Server 2000

High Availability Overview DVD (MS Part# 098-96661)

Very approachable. Please ask me questions!

Possible CombinationsPossible Combinations

Full BULK_LOGGED doesn’t break automated backup procedures or log shipping. However, a log backup immediately before (when changing to Bulk Logged) and a log backup immediately after (when changing back to full) are recommended.

Transitions to/from SIMPLE are NEVER recommended as they break the continuity of the log chain. This eliminates your ability to go back to a prior full…meaning you’re only as good as your last full backup!

n/aBackup Log just prior

to changeSimple

n/aNo Change Required, Transaction Log Backup Recommended BEFORE

Bulk_Logged

No Change Required, Transaction Log Backup Recommended AFTER

n/aFull

SimpleBulk_LoggedFull FromTo

Full Database or Differential backup after

change

Backup Log just prior to change

Full Database or Differential backup after

change

ResourcesResources

Check out www.sqlskills.com for information about upcoming events, useful downloads and excellent scripts! There are quite a few resources and/or links to use.

MSPress title: SQL Server 2000 High AvailabilityAuthors: Allan Hirt with Cathan Cook, Kimberly L. Tripp, Frank McBathISBN: 0-7356-1920-4

Check out the main page of www.sqlskills.com for asample chapter to download!

ResourcesResources

See www.SQLSkills.com for additional sample code Articles in SQL Server Magazine, Aug/Sept 2003:

Recovering from Isolated Corruption The Best Place for Bulk_Logged, InstantDoc #39782

Articles in SQL Server Magazine, Sept 2002:Before Disaster Strikes, InstantDoc ID#25915Log Backups Paused for Good Reason, InstantDoc

#26032Restoring After Isolated Disk Failure, InstantDoc

#26067Filegroup Usage for VLDBs, InstantDoc #26031

Articles in TSQLSolutions Journal, Oct 2001:TSQLTutor Quick Tip:

Saving Production Data from Production dBAs, InstantDoc ID#22073

ResourcesResources

See www.sqlmag.com and www.tsqlsolutions.com for articles on Backup/Restore

From Books Online “Home Page” select White Papers to get to msdn

For Tech Net articles use: http://www.microsoft.com/technet/prodtechnol/sql/default.asp?frame=true

See www.microsoft.com/sql for all sorts of stuff! Support Resources listed:

http://www.microsoft.com/sql/support/default.asp Webcasts:

http://support.microsoft.com/default.aspx?PR=pwebcst&FR=0&SD=MSDN&LN=EN-US&CT=SD&SE=NONA

BOL FavoritesBOL Favorites Make sure to get the latest version of the BOL.

See www.microsoft.com/sql, Technical Resources, Product Documentation

“Switching Recovery Models” “ALTER DATABASE” Functions: OBJECTPROPERTY, SERVERPROPERTY,

DATABASEPROPERTYEX “Using Recovery Models” “Checkpoints and the Active Portion of the Log” “Virtual Log Files” “Shrinking the Transaction Log” “Optimizing Transaction Log Performance”