LoadRunner SE Guide 김범수 한국비지네스써비스 ( 주 )

Purpose of this Presentation  Educate SE’s on the LoadTesting Methodology presented to the customer on the first day of a QuickStart  Ensure that appropriate expectations are set with customers - PRIOR TO TEST !!!  Better understand what it takes to perform a successful LoadTest

LoadTest Implementation Process

Planning  Objectives / Goals of LoadTest  System Analysis and Design  LoadRunner H/W and S/W  DB Refresh Strategy and SUT  Monitoring Tools  LoadRunner Product Training

Planning - Objectives/Goals FOR EXAMPLE:  Stability - Will 500 concurrent users crash the system?  Reliability - Do all the Business transactions work properly under load?  Performance - Is the performance acceptable according to the specifications?

Planning - Analysis/Design  Designing a Scenario: –Who are the users? –How many users are there? –What do they do? –How often do they do it?  What do you want to measure (transactions) –Entire Business Process (Post Journal Entry) –All SQL traffic –Specific DB inserts or updates

12 AM 6 AM 8 AM12 PM 5 PM 8 PM10 PM12 AM White area is daytime online processing Gray area is nighttime batch processing Typical Work Day Create Invoices (Accounts Payable) Billing Due List 60 Invoice Printing 30 System Backup Delivery Due List Create Sales Orders Transferring Materials to the Vendors 1510 Changing Sales Orders 27 Create Invoices (Accounts Receivable) 3045 Display Sales Orders Good Issued Planning - Analysis/Design Task Distribution Diagram Calling Human Resources Information System Emulated Hour

Planning - Analysis/Design

Planning - LoadRunner H/W  What type of hardware required to support number of users? –OS, RAM, Disk, CPU  Where to place driver machines ?  WAN / LAN Network simulations  GUI / DB Vusers ?

Planning - LoadRunner H/W

Planning - SUT  Scripting and Execution environment  Stable environment –configuration –data (loaded with Master and Transactional) –completed System and Functional Testing  DB refresh strategy –Between runs ?

Planning - Monitoring Tools  LoadRunner Monitoring Tools  Database Tools  Network Sniffers  (H/W) Operating System

Planning - Who?  Project Lead - –Objective, Goals and Project Plans  LoadRunner Team - –Analysis, Design and Training  Technical System Staff - –System Under Test  Functional Experts - –Analysis and Design

Development  LR Script Development –GUI - WinRunner –DB - VuGen  “Test” Data creation and preparation  LR Script Testing

Script Development  Understand all Business Process –Navigation and all Data input/output  Basic Script Recording  Enhance Script –Enter transactions and rendezvous –Parameterize and variablize data –Error checking routines –Correlate Queries

Test Data - Creation  Build Data files to support multiple users –Extract existing data from DB –Build data as necessary - LR Scripts  Data “Prep” Phase –In SUT create and modify data as needed to support large load test –Create backup of DB to refresh from

Script Testing  Single User - Single Script –Test all the data combinations –Identify new exceptions or correlation's  Multiple User - Single Script –Table locks – Data integrity  Multiple User - Multiple Scripts –Data issues among different BP’s and users

Development And Testing - Who?  LoadRunner Team - –Create and test both scripts and data  Technical System Staff - –Create data and DB strategy  Functional Experts - –Create scripts and data

Execution  Three types of execution –20% of Full Load - flush out transaction problems, effectively debug transaction –Full Load - flush out system problems, effectively debug system –120% of Full Load (Overdrive) - provide a margin of error as well as future scalability

Execution  Should be an iterative process: –Refresh DB - Baseline –Run Scenario (LoadTest) –Analyze Results (LR, DB, OS, Network) –Tune System

Execution - Who?  LoadRunner Team - –Run Scenario and pinpoint problems  Technical System Staff - –Tune and Debug System problems  Application Developers - –Tune and Debug Application problems

Common Challenges: –Analysis and Design - time consuming, difficult to analyze user activities –Data Refresh Strategy - time consuming, schedule into system activities, disk space –Functional Expertise - hard to find, needed during script recording and data management –Debug/Tune System - very specific expertise, time and availability, ROI !!!

Wrap-Up  LoadTesting is NOT trivial  Minimal 3 weeks with very narrowed scope and full systems and functional support  Engage “Consulting Group” to participate in conference calls with customers to discuss implementation issues if necessary

Wrap-Up  Excellent products do not guarantee successful customers… LoadRunner QuickStarts Do