marius dumitru sivakumar harinath gonzalo isaza akshai mirchandani
TRANSCRIPT
Testing Microsoft SQL Server Analysis Services
Marius DumitruSivakumar HarinathGonzalo Isaza
Akshai Mirchandani
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Introduction to Analysis Services Analysis Services Engine Architecture Current Testing Process & Challenges Approaches to improve testing
Outline
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Multidimensional database Multidimensional Expressions (MDX) queries Server and client tools
Introduction to Analysis Services
4
INFRASTRUCTURE
Query Execution ArchitectureClient
Application
Analysis Services
MDX query
Query Parser
Formula Engine
Populate axes
Compute cell data
sFE Caches
Subcube operations Calculatio
n Engine
Storage Engine
sSE Caches Partition Data Query
SE Evaluation Engine
Seri
aliz
e r
esu
lts
Metadata Manager
Data Mining
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Functionality Testing Databases used Exercise different components Formula Engine (Calculations & rules) Performance and Stress testing Acceptance criteria & reporting
Testing Analysis Services
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Functional testing◦ Most common type of queries◦ Recursive relationship definitions (P/C) complicate
schema◦ Execution path evaluation may change easily◦ Size of query plan space◦ Many calculations may apply to a single cell◦ Size of cartesian product of dimensions◦ Combination of features
Challenges
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Performance testing◦ Wide variety of databases ◦ Feature change has effect in other areas◦ Profiling issues
Challenges
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with member SalesIncludingAdPromotion asiif ([Sales Reason].[Sales Reason].currentmember is[Sales Reason].[Sales Reason].[Magazine
Advertisement],[Measures].[Internet Sales Amount],[Measures].[Internet Extended Amount] + [Measures].
[Internet Tax Amount])
select SalesIncludingAdPromotion on 0,[Customer].[Full Name].members on 1from [Adventure Works]where [Customer].[Country-Region].&[United States]
Example query using IIF
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e1 e2
IIFCrossJoin
D1 D2 D3
Apply
σ v is not null
IIF(C, e1, e2)Naive Evaluation
100 100
10
0
1M Lookup
1M½
M½ M
C
1M
15K
C e2e1 C
Apply Apply
σ C==true σ C==false
Union
IIF(C, e1, e2)Eager Evaluation
30K
20K
30K
20K
5K10K
15K
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New tool (generate databases & queries) Create db’s & Validate discovers with simple
MDX queries Different storage types Combination of features
Testing Enhancements
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Send same Query
CompareResponses
MOLAP ROLAP HOLAP
Data from AS db Data from Rel dbData from Mixed
Sources
Same database with different storage modes.
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New tool (generate databases & queries) Create db’s & Validate discovers with simple
MDX queries Different storage types Combination of features Ability to influence execution path
Testing Enhancements
13
SQL 2008: Execution path control
Block vs. cell by cell computation
Evaluate an expression when it needs toSqueeze out the “empty” space
vs
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New tool (generate databases & queries) Create db’s & Validate discovers with simple
MDX queries Different storage types Combination of features Ability to influence execution path Databases with focused queries Propose performance impact during
upgrades
Testing Enhancements
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Questions
{gonzaloi,sivah,mariusd,akshaim} @microsoft.com