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]
