1. 12/1/2018 1:01 PM
P4032
System Performance Is a Feature – Understanding System Health Through Telemetry - a continuation of Real-time sentiment built on the Azure IoT stack
Joel Narwold
Developer – Microsoft Pulse
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2. Agenda Microsoft Pulse – Real-time Voting Platform
The Technical Challenge
Structured Logging – The Basics
Serilog – A .NET Library
Lessons Learned/Things to Consider

3. Joel Narwold
Full-stack developer on the Microsoft Pulse team. Worked with the pulse team for the last two years and supported multiple large scale events (including the State of the Union 2017, Presidential Debates, etc)

4. Microsoft Pulse Real-time Voting Platform

5. Microsoft Pulse
Microsoft Pulse is the leading self-service audience engagement technology for real-time feedback.
Capture audience sentiment in real-time and display feedback from participants through live voting and polls.

6. Second Screen
Viewers interface with the screen on mobile and desktop machines to provide real time instant feedback.
The audience sentiment can be broken out by demographic to provide valuable insights to marketers, broadcasters and educators.

7. Producer Screen
The producer screen is a self service tool for creating pulses, surveys, polls and quizzes. The screen is targeted to educators, marketers and broadcasters.
From the dashboard producers can gather valuable insights regarding the number of viewers pulsing, how many votes have come in. This data can be broken out by demographic and sliced and diced with our external API.

8. Microsoft Pulse The Technical Challenge

9. The Challenge
You just recovered from a major site outage. Luckily, the impact was low – but what you think caused the problem is still just a theory. What do you do?

10. The Plan Implement Structured Logging
Monitor architecture performance and potential problem areas
Capture and store user errors
Recap Pulse performance over time

11. Microsoft Pulse Structured Logging - The Basics

12. What Is Structured Logging?
Logging data in a format that isn’t freeform text but rather structured objects

13. The Benefits Eliminate the parsing problem
No more tedious sifting through text blobs
Fields are preserved for use in consuming apps
Introduces query based searches with logging sinks

14. Microsoft Pulse Serilog – A .NET Framework

15. Overview Provides logging to files, console, etc.
Parameters preserved as structured data

16. Serilog Structured Data

17. Storage Types
Simple, scalar values
Collections
Objects

18. Serilog Log Events

19. Syntax Superset of standard .NET format strings Tips
Property names reside between { } brackets
Prefix property names or $ to control property serialization
Use numeric property names to match with log method parameters

20. Levels Verbose – Trace information and debug minutiae
Debug – Internal flow control and diagnostic dumps
Information – Relevant data to outside observers
Warning – Potential system issues
Error – Breakdown within the system
Fatal – Critical errors are crashing the application

21. Dynamic Level Switching
Restrict level of logging to set level
Dynamically adapt level to meet situational needs

22. Source Contexts Tag events with source information
Filter or redirect event messages based on source context

23. Serilog Enrichment

24. Log Context
Dynamically add and remove properties from ambient ‘execution context’
Pushed properties override any existing properties with the same name

25. Available Serilog Packages
Environment
Process
Thread

26. Serilog Sinks

27. Sinks & Seq Sinks employed to store log events in various formats
Over 50 available sinks
Mixture of company and community driven

28. Microsoft Pulse Lessons Learned

29. Know Your System Test your logging at scale Demo different sinks
Log early, log often

30. Thanks. Joel Narwold GMR Digital Solutions Developer