Доклад Ильи Кацова, SQA Days-13, 26-27 апреля 2013, www.sqadays.com

1. Scalable eCommerce Platform Solutions
Jagger: Continuous Performance
Testing of Mission-Critical Applications
Ilya Katsov, Grid Dynamics

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Performance
Testing
Tool
System
Under
Test
Report
What’s wrong?

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What we do
• Develop backend services for 3 of Top-30 US Retailers
• Production clusters of 40 nodes and more
• Load up to 50K TPS
• Heavy computations
in navigational queries:

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Antipatterns of Performance Testing
• Acceptance performance testing
• Independent functional and performance testing
• Poor tracking of testing results
• Insufficient introspection of the system under test
• Failover is tested in production

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Performance
Testing
Tool
System
Under
Test
Report
What’s wrong?

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Performance Testing Ecosystem
Development
Environment
Performance
Environment
QA
Environment
Production
Environment
Functional
Tests
Profiling Performance
Tests
Monitoring
Release
Manager
Performance
Test Lead
Performance
Architect
Technical
Lead

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Slave Slave Slave SlaveSlave
Master
SuT
SuT
Agent
SuT
SuT
Agent
SuT
SuT
Agent
SuT
SuT
Agent
SuT
SuT
Agent
SuT
SuT
Agent
SuT
SuT
Agent
Jagger Technical Architecture
Web UI
HDFS
MySQL
Zookeeper

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Lessons learned: Automate. Automate to scale.
• Completely automated flows
• Jenkins plugin for automatic deployment
• Results warehousing in the database

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Lessons learned: Automate. Automate to scale.
• Decision makers that can access all collected data
• Session comparison
• VCS-friendly configuration in plain text files

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Lessons learned: Monitoring is everything.
• OS-level and JVM-level metrics
• Ability to load external metrics
• All metrics can be involved into automatic decision
making
• Jagger can be used to monitor an external process:
Activity
Jagger
Agent
Jagger Cluster
CI Server

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Lessons learned: Profile system under test
• Performance issues investigation – a typical flow:
Problem ResolvedFix
Performance
Testing
Performance
Problem Detected

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Lessons learned: Profile system under test
• Sampling profiler for JVM (stacktraces via JMX)
• Profiler contains intelligence to detect hot spots
Performance
Problem Detected
Problem ResolvedFix
Profiling
results
Performance
Testing

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Lessons learned: Validate responses
• Custom validators
• Record results of single-user test and use for validation

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Lessons learned: Manage your data well.
• Statistics from one of our accounts:
• About 100 test cases
• 20 scheduled test sessions weekly + ad hoc testing
• 30GB of test results, more than 1500 retained sessions

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Lessons learned: Manage your data well.
• Reports - PDF and web UI

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Results and Roadmap
Successful:
• Continuous testing
• Monitoring
• Validation
• Data management
Not very successful:
• Continuous robustness
testing
• Integration with production
monitoring

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jagger@griddynamics.com
Contact Us
https://jagger.griddynamics.net
Distribution and Documentation