Software Engineering: System Debugging

Debugging is identifying the root cause of an unexpected behavior in a software system. Beyond gdb,windbg, jsconsole etc

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Last Updated: 2022-09-12 06:09:22 English Course Type: Self Learning

Debugging as a deductive process
Things to consider in production system analysis
Methods to isolate root cause without rushing to attaching debuggers
Understanding systems as permuatation of components
Factors to consider while dealing with systems with components owned by different teams
Different engineering communication channels that dictate the scope for debugging

Debugging is more than just attaching a debugger to a running program. Identifying the correct root cause is a skill. In addition, the complexity of distributed systems and multi-language stacks makes debugging even harder.

The key to a long career in software is the ability to build large systems. Large-scale systems cannot be created on a single machine using a single programming language. Hence one has to evolve into a generalist engineer to lead such efforts. Irrespective of role, understanding complexity and ability to navigate it during production fire fighting is a growth accelerator in the industry.

The course takes a generic view of workflows leading to frequently occurring debugging problems in large systems. Intentionally no tool details or deep dives are included. Instead, a guidance framework is provided for the students to explore further in their day job or software projects.

This course is for people who consider themselves problem solvers ahead of their designation and qualifications. For example, if you believe only developers should debug or only support should talk to customers, then this course is incompatible with your ideas.

Each section represents the debugging consideration for a particular scenario.

Course Outline

Section 1: Introduction to communication flows in the industry
Section 2: Ecosystem Overview
Section 3: Production and Maintenance
Section 4: Deployment
Section 5: Integration
Section 6: Implementation
Section 7: Conclusion

Familiarity of systems with more than couple of services
Knowledge about at least one programming langauge
Willingness to followup on ideas in daily engineering tasks.

Active programmers in any language with polyglot systems
Full stack developers
Product developers targeting technical career path
Students looking forward to work in software industry

Section 1 : Introduction 7 Lectures 00:13:42
Lecture 1 :
Introduction to debugging from software engineering perspective. Preview
Lecture 2 :
Software Development Lifecycle communications
Lecture 3 :
Communications overall workflow
Lecture 4 :
Customer Support workflow
Lecture 5 :
Bug Workflow
Lecture 6 :
Production Support Workflow
Lecture 7 :
Product Development Workflow
Section 2 : Basic system overview 3 Lectures 00:05:37
Lecture 1 :
Understanding the scope
Lecture 2 :
Data Boundaries to be identified while debugging
Lecture 3 :
Challenges in debugging
Section 3 : Production and Maintenance 6 Lectures 00:09:24
Lecture 1 :
Alerts
Lecture 2 :
Debugging production issues
Lecture 3 :
Log Files: Debug Assistant
Lecture 4 :
Core Files: Finding evidence to traceback events
Lecture 5 :
Debug Binaries
Lecture 6 :
IMPORTANT: Security's role while debugging
Section 4 : Deployment 7 Lectures 00:15:14
Lecture 1 :
Platform Compatability
Lecture 2 :
Scale and debugging
Lecture 3 :
Fault Tolerance
Lecture 4 :
Disaster Recovery: Debugging use case
Lecture 5 :
Upgrades and rollbacks debugging challenges
Lecture 6 :
Configuration Management
Lecture 7 :
Observability
Section 5 : Integration 2 Lectures 00:04:40
Lecture 1 :
Integration Tests
Lecture 2 :
Third Party Frameworks
Section 6 : Implementation 2 Lectures 00:05:41
Lecture 1 :
Unit Tests
Lecture 2 :
Design and Debugging
Section 7 : Conclusion 1 Lectures 00:00:00
Lecture 1 :
Conclusion

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I am a programmer with an MS in Electrical Engineering and 16+ years of experience in the software industry. I have held roles of principal engineer across multiple organizations, building products that serve billions. I have designed and implemented software solutions for Digital Cinema Distribution, Distributed Systems, Embedded Systems, Map Making, Insurance, Email Servers, and Data acquisition systems for a problem in the Astrophysics domain (master's thesis). The course(s) will help you in answering the following questions that dictate your priorities in life, WHY are you pursuing your current profession? How long do you WANT to pursue the current profession/job? How long do you HAVE to pursue the current profession/job? How long will your current profession/job RESPECT your contribution in exchange for rewards? Remaining relevant for decades in any industry is not just hard but, in many cases, impossible. However, accepting this fact can help you plan a peaceful retired life. There are many more variables in the equation of your peace of mind; start identifying them in these few minutes of assignments. I find peace in exploring the connection between the "How" and "Why" of any technical problem. Over the years, I have realized that research is a lifestyle and engineering is an attitude. The intent of all courses will be practical implementation and a long-term career perspective.