SQL Server Engine

Microsoft SQL Server Microsoft SQL ServerRedmond, WA, USA

Microsoft SQL Server Microsoft SQL Server 2MS SQL Server MS SQL Server OracleIBM DB2MySQLhttp://www.microsoft.com/sqlserver/en/us/product-info/competitor-compare.aspx Relational DB: what is it, small example on bank3 MS SQL Server~1200 :SQL Engine (~250 )Data Programmability & ManageabilityBusiness IntelligenceData Warehousing (Central Services) SDET Software Development Engineerin TestPM Program ManagerSDE Software Development Engineer SDE SDET ~ 1:1

SDET, importance of SDET, : lead vs IC, culture: diversity, non-discremenation: age \ gender \ raceMotivation: interesting projects, training 5% time (1 week), , performance reviews, peer reviewsCareer growth opportunities: lead vs IC. Interested in senior Ics.5SQL Server engineLanguage Processing(Parse/Bind, Statement/Batch Execution)Query Optimization(Plan Generation, Statistics, Costing)Query Execution(Query Operators, Memory Grants, Parallelism)Storage Engine (Access Methods, Database Page Cache, Locking, Transactions, )SQLOS (Schedulers, Buffer Pool, Memory Management, Synchronization Primitives)Utilities (DBCC, Backup/Restore, BCP, ) SDET Lead vs. Individual ContributorSenior SDET (Test architect, ) (~5% ~ 1 ) Performance reviewsPeer reviews - diversity ?

? SDET : Service Packs \ Cumulative Updates : Virtual Team , . leap year problem Virtual Teams, 9 (Functional) (Stress) (Performance and scalability) SQL Dumper AutoVerify

CREATE TABLE table INSERT INTO table CREATE CLUSTERED INDEX index ON table - DBCC CHECKDB DROP INDEX index -DROP TABLE table

: pipelineCreate Index -Insert Create TableDiff resultsDBCCAuto FileSchemaData GenCluster \ Non-cluster, Column15Each step is replaced by a generic component. We are yet to instantiate this.Model based testing , Branches \ Builds , Transaction operations: begin tran, commit, rollback, savepoint etc.DDLDML pre-conditions ... + + - - (code coverage) + - - (learning curve)-

(Supportability) , DMVs Catalog Views \ System Tables \ stored proceduresServer log (ERRORLOG)Memory dumpsWindows Event logXEvents \ SQL Trace events (testability hooks) \ \ server crash trace flags / CSS

Trace flagsXEventsSQL Extended Events , SQL Server 2008 Synchronous TargetSleepAbort threadAbort transactionKill serverAssociate callback functionXEvents XEvents Xevent - XEvents 2-phase commit 1 2 1. !1. !2. !2. !3. Commit3. Commit XEvents 1 2 1. 1. 3. Rollback3. Rollback2. 2. XEvent -> Kill Server Stackhasher stack traceSimulated exceptionsOut-of-resource errorsInterrupts (control-C)Fuzzing Programming interfacesSQL statementsFile formatsNetwork protocols

(Central services),

: OS \ SQL Version: Branch \ Build Test store : \ SQL Server

Health monitorAutoVerify: Central services 29

AutoVerify (file bug) Call Stack , -

AutoVerify asserts \ AVs , -, 3 ~267 000 ; ~16 000 ; ~30 000 -~50% ~90% - SQL Dumper (Access Violation) assert (*.mdmp) , offline- Microsoft Watson ( ) , ! -, , University of Vermont, MS in Computer ScienceC 2007 Microsoft, SDET SQL Serveremail: [email protected]