Warwick Rudd

Microsoft Certified Master (MCM) – SQL 2008

Principal Consultant

Warwick@sqlmastersconsulting.com.au

@Warwick_Rudd

About Me : Warwick Rudd

• SQL Server Consultant

• MCM – SQL Server 2008

• MCSM – Data Platform

• Certified Trainer

• Reviewed 4 SQL Server 2012 Beta Exams

• Blogger on Simpletalk.com

• Presenter at:

• User Groups

• SQLSaturdays

• TechED Australia

History of Compression

SQL Server Database Compression

SQL Server Backup Compression

Compression Estimation Tool

The reduction in size of data to save space or processing time.

SQL Server 2005 SP2

•New Data Type - VarDecimal

SQL Server 2008

•Database & Backup compression

SQL Server 2008 R2

•Unicode data compression

SQL Server 2005 SP2 SQL Server 2008 SQL Server 2008 R2

Edition Enterprise Enterprise Enterprise & Data Center

Compression Type

VarDecimal

Row Level

Page Level

Unicode

Benefits Cost

Performance Improvements Increased CPU utilisation

• More data in memory

• Reduce I/O

Reduced disk space usage

• Database data files

• Backup files

Reduced time to backup

Cost Savings

SQL Server 2005 SP2

• Sys.sp_estimated_rowsize_reduction_for_vardecimal

SQL Server 2008 & R2

• Sp_estimate_data_compression_savings

SQL Server 2005 SP2

• Enable database for Vardecimal Storage Format

• Sp_db_vardecimal_storage_format

• Enabling table for Vardecimal storage format

• Sp_tableoption

SQL Server 2008 & R2

• Alter table [TableName] Rebuild With (Data_Compression = Compression Type)

• Alter table [TableName] Rebuild Partition = All With (Data_Compression = Compression Type on Partitions (x to n))

• Alter Index [IndexName] on [TableName] Rebuild With (Data_Compression = Compression Type)

• Compression Types (Row, Page, None)

Data Types not able to be compressed

• XML

• BLOB

• MAX Datatypes

Tables not eligible for compression

• Maximum row size + compression overhead > 8060 bytes

Compression with Partitions

• Splitting a range

• Merging a range

• Switching a range

SQL Server 2005 SP2 SQL Server 2008 SQL Server 2008 R2

Edition

Standard

Enterprise

Data Center

Benefits Cost

Performance Improvements Increased CPU utilisation

• Reduce I/O

Reduced disk space usage

Reduced time to backup

Cost Savings

Instance Level

•SSMS

•Transact SQL

Defaults can be overridden

•Transaction Log Shipping

•Maintenance Plans

•SSMS

•Transact SQL

Available from Codeplex

• http://ssce.codeplex.com/

http://blogs.msdn.com/b/sqlserverstorageengine/archive/tags/data+compression/

http://msdn.microsoft.com/en-us/library/dd894051(v=sql.100).aspx#_Appendix_C:_Script

http://msdn.microsoft.com/en-us/library/cc280576.aspx

http://msdn.microsoft.com/en-us/library/cc280464.aspx

www.sqlmastersconsulting.com.au