Download SQL Server Compression

SQL Server Compression
Estimation
Presented by Warwick Rudd – warwick.rudd@wardyit.com
About Warwick Rudd
• SQL Server Consultant WARDY IT Solutions
– Email: warwick.rudd@wardyit.com
• Microsoft Certified IT Professional – SQL 2008 Admin
(MCITP SQL 2008 Admin)
• Microsoft Certified Trainer (MCT)
• WARDY IT Solutions
– Australia’s leading SQL Server specialists
– Deloitte Technology Fast 500 Asia Pacific 2010 Winner
Contents
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•
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History of Compression
SQL Server Database Compression
SQL Server Backup Compression
Compression Estimation Tool
What is Compression ?
The reduction in size of data to save space or processing time.
History of Compression
• SQL Server 2005 SP2
– New Data type - VarDecimal
• SQL Server 2008
– Database & Backup compression
• SQL Server 2008 R2
– Unicode data compression
Database Compression Matrix
SQL Server
2005 SP2
Edition
Enterprise
SQL Server
2008
SQL Server
2008 R2
Enterprise
Enterprise &
Data Center
Compression
Type
VarDecimal

Row Level


Page Level


Unicode

Database Compression Cost Benefit
Analysis
Benefits
Performance improvements
• More data in memory
• Reduced I/O
Reduced disk space usage
• Database data files
• Backup files
Reduced time to backup
Cost Savings
Cost
Increased CPU utilisation
Database Compression Estimation
• SQL Server 2005 SP2
– Sys.sp_estimated_rowsize_reduction_for_vardecimal
• SQL Server 2008 & R2
– Sp_estimate_data_compression_savings
Enabling Database Compression
• 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)
• Compression Types
– Row
– Page
– None
Enabling Database Compression
– Alter Table [TableName] Rebuild Partition = All with
(Data_compression = Compression Type on Partitions
(x to n))
• Compression Types
– Row
– Page
– None
– Alter Index [IndexName] on [TableName] Rebuild with
(Data_compression = Compression Type)
• Compression Types
– Row
– Page
– None
Things to consider
• Data types not able to be compressed
– XML
– BLOB
– MAX Datatypes
• Tables not eligible for compression
– Maximum row size + compression overhead >
8060 bytes
Things to consider
• Compression with partitions
– Splitting a range
– Merging a range
– Switching partitions
SQL Server Database Compression Demo
Backup Compression Matrix
SQL Server
2005 SP2
SQL Server
2008
SQL Server
2008 R2
Edition

Standard
Enterprise
Datacenter



Backup Compression Cost Benefit
Analysis
Benefits
Performance improvements
• Reduced I/O
Reduced disk space usage
Reduced time to backup
Cost Savings
Cost
Increased CPU utilisation
Enabling Backup Compression
• Instance level
– SSMS
– Transact SQL
• Defaults can be overidden
– Transaction Log Shipping
– Maintenance Plans
– SSMS
– Transact SQL
SQL Server Backup Compression Demo
Compression Estimation Tool
• Available from Codeplex
– http://ssce.codeplex.com/
Compression Estimation Tool Demo
Thanks for listening
Warwick.rudd@wardyit.com
0403 144 302
http://www.wardyit.com
http://www.wardyit.com/blog
Other Resources
• http://blogs.msdn.com/b/sqlserverstorageengine/archive/tags/da
ta+compression/
• http://msdn.microsoft.com/enus/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