March 12, 2012

Sample Performance Test plan


1      Overview

1.1   Objective

It is a simple Windows based system that enables the Buying Departments to maintain cost and selling prices of products for multiple countries. E-Test scope of work would be focused on performance evaluation of the application and database servers executed through 10 business critical transactions for the Application. The objective of the Performance & Scalability effort is to analyze the reasons for the slow performance of during execution of the critical business transactions and to find out the scalability of the application in terms of number of concurrent users.

        Scope

Features/Attributes with in the scope of testing
·         The scope of testing is based on onsite/offshore process model. According to this model the analysis, design of performance test, the script development and data requirement will be performed at offshore. Performance test execution will be carried out at CATE environment at onsite.
·         Performance tests are based on the assumption that the entire Post-GUI application will be treated as a black box
·         The scope of testing only includes the Post-GU application and database server. Load Test with maximum of 50 concurrent users will be performed to identify the cause of degradation in performance of the Post-GU application.
·         Stress test will be carried out once the system is scalable for 50 concurrent users, to determine the breaking point of the Post-GU application.
·         Endurance test to evaluate the stability, reliability and availability of the application will be conducted on the system once scalability is confirmed.

Features/Attributes not with in the scope of testing
·         Testing of client emulation through Citrix server and its scalability and performance is out of scope with Post-GU application.
·         The performance evaluation of the client is not in scope, only the performance of application and database server is within the scope of P&S activity.


        References


ü  M&S Performance Test requirement collection doc
ü  Performance testing proposal- doc
ü  High-level test plan- doc




2      Requirements

2.1   Hardware

SNO
Type
Hardware Details
1.      
Application Server
ü  Intel Pentium III - 1400 MHz
ü  1 GB RAM
ü  66 GB Hard Disk


2.      
Database Server

*The Server setup and the load generation will be at CATE environment (M&S).

SNO
Type
Configuration
Quantity
1.       
Load Generator
Pentium4 256MB RAM, 20GB HDD
2No(depending on the Virtual users supported)
2.       
Controller
Pentium4 512MB RAM, 20GB HDD
1No
*The configuration can vary based on the availability at the CATE environment for generating load.

2.2   Software

SNO
Type
Software Details
1.      
App server
COM +
2.      
Database server
SQL 2000
3.      
Operating System
Microsoft Windows 2000 server, Microsoft Windows 2000 professional

2.3   Automation Tools

LoadRunner is an industry leading performance-testing tool from Mercury Interactive. This tool will be used for testing the Post-GU application of M&S and will be used to simulate the communication between the client and the COM + server for multiple users to find the performance problems.
Load Runner V 7.51 will be used for this test. To know more about the Load Runner 7.51, please refer Appendix A.

2.4   Environment Setup

The hardware infrastructure for the test environment will be provided by M&S as mentioned in the section 2.1.

        Application Overview

The application is a perfect two-tier architecture with COM+ application server in the business logic layer and SQL 2000 database server in the persistent layer. The clients access the system via client (a thick client) from various geographical locations. The Post-GU system comprises of an online sub-system and a batch sub-system. The online subsystem is accessed by the category - merchandisers, buyers and suppliers using a client. The batch system manages downloads from mainframe, uploads back into the mainframe, production of CPP reports and backups.

        Test Environment

The application under test will be deployed in the CATE environment (M&S) and load will be generated within the same network. Since the application and database are deployed on two different machines that communicate through a common network link monitoring the network component between them is out of the scope of performance evaluation.
For test design and execution more input will be required from CATE environment for instrumentation strategy.

        Production Infrastructure












3      Approach

To perform base line tests on the Post-GU system for finding out the scalability, identifying the cause of performance degradation making a comparative study with Post-GU system
a)     A list of transactions, which are business critical in the Post-GU system, is to be identified.
b)    The workload pattern (Percentage of transaction Mix) will be defined as a scenario, which needs to be executed in the Post-GU system to collect baseline statistics.
c)     A goal in terms of number of concurrent connections to the application server is set to 50 users to study the scalability of the system.
d)    Scripts will be generated to simulate the communication between the COM client and the Application server for the identified transactions using Load Runner 7.51 and parameterized for multiple users. These scripts will be used to generate load for performance evaluation of the application and database servers.
e)     Environment and data setup for the performance test execution will be validated in the CATE environment.
f)     Monitoring tools will be deployed in the CATE environment to collect statistics on the performance of COM+ and SQL 2000.
g)    A preliminary report based on analysis consisting of the scalability point and threshold level of the Post-GU system will be prepared.
h)     An executive summary will be prepared with findings and recommendations if any, for the improvement of Post-GU application.

3.1   Script Development

        Create Automated Scripts

Automated scripts will be designed for each transaction mentioned in the requirement collection document using the Mercury interactive Load runner tool 7.51 simulating the client’s communication with the COM+ server. Single user scripts will be recorded with the tool and will be parameterized for load generation to simulate the same transaction for multiple simultaneous traffic. Transaction dependencies would be identified and would be incorporated in the scripts. Error handling routines will be added to validate the server responses for the client’s request from the tool. The scripts will be mapped to the various scenarios to be tested. Navigation of the transaction would be as specified in the transaction traversal document.

        Script Validation  

Scripts will be tested on the environment where it was generated with multiple users and in the CATE environment for validating the scripts before actual execution of the test. The data setup required for load generation is also verified along with the scripts. The server monitoring scripts would be verified for their output accuracy.

        Create LoadRunner Scenarios 

                        I.    Load Testing Scenario
The Post-GU application is to be tested for performance and scalability for a load 50 concurrent users performing the business critical transaction. Load will be created on the COM+ application server gradually with 5 users every 2 minute. Each user once loaded in the system will perform the transaction mentioned in the scenario continuously with a transaction think time as specified in the transaction traversal document. Once 50 users are loaded in to the system the load will be maintained for 10 minutes to study the performance of the Post-GU system at 50 users load.
                      II.    Stress Testing Scenario
This scenario will be executed once the Post-GU system is scalable. The Post-GU application will be stressed with a load of 50 concurrent users performing the business critical transaction. Load will be created on the server gradually with 5 users every 2 minutes. Each user once loaded in the system will perform the transaction mentioned in the scenario continuously. The think times between transactions will be eliminated to create a congestion of requests at the server end.  Once 50 users are loaded in to the system the load will be maintained for 5 minutes to study the performance of the system under stress from 50 users load.
                     III.    Endurance Testing Scenario
This scenario will be executed once the Post-GU system is scalable. The Post-GU application will be loaded with 25 user and maintained for 8 hrs to study the reliability and availability of the system under 50 users constant load maintained for a long duration.

3.2   Workload Criteria

        Business Function Overview

The following table lists the priority of the business functions being tested. A high rank implies that the business function must be tested and is part of the critical path.

Rank
Business Function/Operation
High
Open Product
High
PSL
High
Buy
High
Sell
High
Authorization
High
Reconciliation
High
Price Suggestion
High
Margin Charges
High
Generate PSLs
High
VAT

        Pre-Production Workload Scenarios

The table below shows the high-level test scenarios that will be executed in CATE envrionment

Scenario #
Scenario Name
Number of Concurrent Users
 Workload Distribution
Duration
1.    

50 User Load Test

50 users

 8% PSL
15% Buy
15% Sell
25% Authorization
25% Reconciliation
  4% Price Suggestion
  2% Margin Charges
  2% Generate PSLs
  4% VAT

30 minutes

2.    

50 User Stress Test

50 users

8% PSL
15% Buy
15% Sell
25% Authorization
25% Reconciliation
  4% Price Suggestion
  2% Margin Charges
  2% Generate PSLs
  4% VAT

30 minutes

3.    

20 User Endurance Test

20 users

8% PSL
15% Buy
15% Sell
25% Authorization
25% Reconciliation
  4% Price Suggestion
  2% Margin Charges
  2% Generate PSLs
  4% VAT

8 hours


NOTE: The duration implies the length of the test after the goal number of users is reached.

3.3   Test Execution 

        Execute Pre-Test Checklist

·            Validation of the functionality of all the transactions to be tested in the application deployment manually through the client.
·            Data setup and validation for the transactions to be tested.
·            Load runner script validation using one user on the existing application environment for all the transactions
·            Server monitoring setup and validation.
·            Setting up Controller and Load generator.
·            Setting up the scenario to be tested.

        Execute Scenario

Base Line tests to validate scripts will be conducted before actual execution of the scenario. Scripts will be executed based on the scenarios identified in the workload criteria. Data collected from various monitors will be validated and correlated. According to the effort estimates a maximum of 3 iterations of test executions will be performed. After an iteration of execution the results will be analyzed and changes will be derived to implement for the next iteration.


        Capture and deliver test results 

For each test execution, the following LoadRunner summary reports will be delivered to the Client:
1.     Scalability metrics
·         Transaction Average Response Time Summary vs Load
·         Throughput vs Load
·         Transactions per Second
2.     Error Statistics
·         System or client side errors vs first time load when the first error was reported in the tool
3.     Server Statistics
·         Resource utilization (CPU, memory and Disk)
·         Component monitors
4.     Network Statistics
·         Network bandwidth utilization

3.4   Status Reporting 


During the script development and verification, E-Test team will deliver a daily status report via e-mail. The status report will be delivered by the close of business each day. The status report will document the progress of the script development. All issues and their resolutions will be included in the status report.

During script execution, E-Test Center will continue to deliver daily status reports via e-mail. The status reports will include a list of the scenarios executed during the day as well as any observations from the test. The transaction summary reports and other performance reports will be delivered at the completion of each scenario.

3.5   Issue Reporting 

All issues will be entered into spreadsheet tracking tool. The issue form will contain the following information:
¨       Date the Issue was Reported
¨       Name of Tester Reporting the Issue
¨       Status of the Issue
¨       Application Associated with the Issue
¨       Detailed Description of the Issue
¨       Detailed Description of the Issue Resolution

E-Test Center will provide M&S with the same information on the status reports. If a critical issue arises, E-Test Center will notify M&S development team offshore as soon as possible rather than waiting to include it on the status report. A critical issue is defined as an issue that stops progress and no workaround can be identified.


4      Test Deliverables

E-Test team will provide the following deliverables:

4.1   Test Plan (this document)

This document will contain plan of action for the test detailing the approach, hardware and software requirements, environment details, resource details and schedules etc.

4.2   Preliminary Test Report

A report containing details of the scalability, transaction(s) performance summaries and list of findings will be given at the end of every iteration. This report gives detailed information on whether the system was able to scale up. It also lists performance bottlenecks if any in the various tiers (application or database) of the architecture.

Sample Performance Report

4.3   Periodic Status Updates through Mails

Updates on the status of the tests will be sent through mails weekly.

4.4   Final Test Report

Executive summary of the entire testing process that was carried on Post-GU application at the CATE environment indicating the scalability and performance bottlenecks identified.







5      Resources and Schedules                            

5.1   Personnel


Phases
Required
Available
Duration
Requirement Understanding
2
2
2 days
Selection of Tool
2
2
4 days
Analysis
2
2
6 days
Test Design
2
2
6 days
Test Development
2
2
6 days
Test Execution
2
2
15 days
Test Results
2
2
4 days

5.2   Equipment


Type and Attributes
Quantity Required
Quantity Available
Duration
Deadline / Schedule
Load Runner 7.51
50 VU with Controller
50 VU with Controller
2 weeks


Load Generator machines
2
2
2 weeks


*The above equipment is the minimal expected in the CATE environment


5.3   Accessories


Type and Attributes
Quantity Required
Quantity Available
Duration
Deadline / Schedule
Desktop Machines that can access the CATE environment for installing server monitoring tools and for test data analysis.
2
2
2 weeks





5.4   Schedules


Task Name
Duration
Start Date
Finish Date
Resource Allocated
Requirement Understanding
1.9 days?






Requirement Understanding
4 hrs?






Prepare High level project plan
8 hrs?






Review and acceptance of project plan
3.2 hrs?






Deliver High level project plan
0 days?






Selection Of Tool
3.2 days?






Evaluation of Load Runner Tool for automation
16 hrs?






prepare evaluation document
6.4 hrs?






Review and accept tool selection
3.2 hrs?






Deliver tool evaluation document
0 days?






Analysis
6 days?






Business Transaction Review
12.8 hrs?






"Determine Critical transactions, metrics, workloads"
12.8 hrs?






"Determine high level data requirements, environment setup and deployment considerations"
12.8 hrs?






Prepare Test Plan document
6.4 hrs?






Review and acceptance of Test Plan document
3.2 hrs?






Deliver Test Plan Doc
0 days?






Test Design
6 days?






"Determine high risk architecture areas, instrumentation strategy "
12.8 hrs?






"Decompose critical business transactions, Identify data creation process, define repeatable test strategy, define testing entry/exit criteria, risks and mitigation strategies, limitations and assumptions"
12.8 hrs?






Identification and preparation of Load test scenarios (Scenarios will be prepared by M&S. Those scenarios will be grouped together for Test execution by)
12.8 hrs?






Prepare Test design document
6.4 hrs?






Review and acceptance of Test Design document
3.2 hrs?






Deliver Test Design Doc
0 days?






Test Development
5.63 days?






Build scripts and validate
40 hrs?






Review and accept scripts
5 hrs?






Deliver Scripts for execution
0 days?






Travel
1 day?






Travel to UK



1d?









Test Execution
14.63 days?






Test Environment set-up and validation
16 hrs?






Build data and validate
16 hrs?






Update scripts and test drivers
5 hrs?






"Create baseline test to validate environment, monitors and scripts"
8 hrs?






Execute tests and collate test data
12 hrs?






Analyze data and list suggestions
20 hrs?






Review suggestions and apply changes
40 hrs?






Travel
0.38 days?






Travel To India
3 hrs?






Test Results
4 days?






Correlate results summary
12.8 hrs?






Prepare Results summary document
12.8hrs?






Review and acceptance of Result summary document
6.4hrs?






Deliver Result Summary
0days?






 



6      Entry, Exit Criteria and Test Stop Criteria

6.1   Entry Criteria

  • Functionally stable application.
  • CATE environment availability.
  • Post-GU system deployment with application and database server.
  • Data setup for the Business transaction

  • All the Performance objectives are met
  • Performance and scalability effort verified.
  • Performance and scalability counters have been collected.
  • All test results are documented.
  • Submit the test results summary document and recommendation document for Performance and Scalability of the Post-GU application.

6.2   Test Stop Criteria

·         Schedule for using CATE environment exhausted.
·         Test objectives were met
·         Performance bottleneck identified for the cause of degradation in system scalability.
·         Test results have been analyzed and documented. All issues have been documented and discussed with M&S




7      Suspension Criteria and Resumption Requirements

Suspension Criteria
Resumption Requirements
Unstable system
Functionally Stable system
Test Environment setup delay or issues for testing Post-GU application and database server in CATE environment
Once Test environment is ready perform baseline tests and actual scenario executions.
Delay in providing testing tool license and load generators as per requirement.
Perform tool evaluation, test developed scripts and continue Test execution once tool is made available and change in schedule
Test Data setup invalid
Resume the test on valid data.
Bottlenecks identified for degrading application scalability
Repeat the test after the defects are fixed or communicated to the onsite coordinator.
Delay in providing the accessories for deploying the monitors and test data extraction tools.
Resume monitoring and test data extraction once the necessaries are made available



8      Risk Assessment

8.1   Schedule Risk:

Ø  The Test Schedule is subject to delivery of the Software & support to the E-Test Team on time.
Mitigation Plan – The Test team will closely monitor the progress of the onsite and offshore development teams and escalate anticipated delays to the Project Manager in advance. In case of delays, the team shall spare no effort at completing tasks in time.
Ø  Change in Application might require work of test scripts, which requires additional efforts.
Mitigation Plan – The effort involved in the rework of scripts will be intimated to the onsite coordinator and the test team shall spare no effort at completing tasks in time.
Ø  Incase of server failure during the course of load testing, the testing will come to an abrupt halt. Additional efforts are required to bring the environment back up and running.
Mitigation Plan – The effort involved in restoring the environment will be intimated to the development team after consultation with support services and the test team shall spare no effort at completing tasks in time.

8.2   Technology Risk:

Ø  Testing is subject to the availability of the intranet network connection for the Load test machines
Mitigation Plan – The E-Test Team will co-ordinate with the concerned Project manager and conduct formal meetings with the concerned teams.
Ø  Testing is subject to the availability of the same application to be deployed on which test scripts were generated.
Mitigation Plan – The Test Team will contact the onsite coordinator and sort out the issue.
Ø  Load runner 7.51 does not completely support Application Server Monitoring
Mitigation Plan – The monitoring feature provided inbuilt in the application server or in-house built monitoring scripts will be used.

8.3   Resource Risk:

Ø  The E-Test team will require clarifications from the Project Managers and the Development team during the process of Test case preparation and execution. The availability of the above people at the right time is subject to risk.
Mitigation Plan – The Test Team will co-ordinate with the concerned Project manager and will ensure their availability for discussions and clarifications.










9      Limitations and Assumptions


·         Support from the developers/business analysts for business transaction review for the list of transactions identified.
·         Performance test is to be conducted in the CATE test environment.
·         A functionally stable Post-GU application (equivalent to the one used for scripting at offshore on which test scripts were created) should be deployed in the CATE environment.
·         Environment and Data setup as per the Test Plan for the transactions to be tested will be done with the support of a coordinator at onsite/offshore.
·         All tests will be conducted with a volume base as equivalent as that of the production database set up.
·         Testing tool Load Runner 7.51 will be made available for the E-Test lab team at onsite for execution.
·         Machines for the E-Test team to deploy in built Data extraction tools for data correlation and analysis will be provided.
·         Access to the servers will be provided to E-Test team to monitor various layers of the application test environment.
·         During Test execution, services that are not related to the Post-GU should be stopped to isolate the test environment for Post-GU application.
·         onsite support for Data collection from various layers.
·         onsite support for analysis if any bottleneck identified at the application level.
·         Batch Jobs scheduled when is online in the Production environment can be simulated in CATE-environment.
·         Hardware bottlenecks if any will be identified and reported. Tests should be performed only on vertical/horizontal scalable hardware to confirm the resolution of the same and no recommendations on extrapolation of results will be provided.
·         SQL statement will be reviewed and tuned if there is degradation in response time.
·         If the response times of any component method call within the scope of the identified transactions are unacceptable then they will be analyzed and suggestions to improve the same will be given as part of the Executive summary report.

10 Change Log


67 comments:

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