Site Reliability Engineering: The DevOps Culture.

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The document discusses site reliability engineering and DevOps culture. It introduces site reliability engineering as reducing silos, accepting failures, gradual changes, leveraging automation, and measuring everything. The talk will cover developers vs operators, the DevOps culture, service level objectives like availability and scalability, and resources for further information. Q&A will follow the presentation.

Technology

Site Reliability Engineering
DevOps Culture and System Reliability
Ahmed Badran - CTO @Magalix
ahmed.badran@magalix.com

Agenda
- My Background
- Developers vs Operators
- The DevOps Culture
- Site Reliability Engineering
- Service Level Objectives
○ Availability
○ Scalability
- Resources
- Q&A

Developers vs Operators
With the rise of online systems and microservices architecture, agile development
became the norm
Agility vs Stability
Applications vs Infrastructure

The DevOps Culture
❏ Reduce Organizational Silos
❏ Implement Gradual Change
❏ Accept Failures as Normal
❏ Leverage Tooling and Automation
❏ Measure Everything

Site Reliability Engineering
✓ Reduce Organizational Silos
➔ Shared ownership of production environment
✓ Accept Failures as Normal
➔ SLO & blameless postmortems
✓ Implement Gradual Change
➔ Agile development and small releases
➔ Canary testing in production
✓ Leverage Tooling and Automation
➔ Continuous integration and deployment
✓ Measure Everything
➔ Define and measure system reliability
➔ Measure and reduce toil

Service Level Objectives
● SLI Service Level Indicator
Metrics over time which inform us about the health of a service
● SLO Service Level Objective
Agreed about bounds regarding how often the SLI must be met
● SLA Service Level Agreement
Business level agreement which define penalties if we fail to deliver the agreed on availability

Availability
Good service to total demanded service
❏ Availability = Uptime / (Uptime + Downtime)
❏ Availability = Successful Requests / Total Requests

Scalability
● Measuring Load
○ Write load
○ Read load
● Measuring Performance
○ Throughput
○ Response time
○ Queuing time

Resources
❏ Site Reliability Engineering - 2 books
❏ Building Microservices (Designing Fine Grained Systems) - Book
❏ Designing Data-Intensive Applications - Book
❏ On Designing and Deploying Internet Scale Services - James Hamilton 2007
❏ Meaningful Availability - Google Paper
❏ 8 Fallacies of Distributed Computing - wikipedia

Q&A
Ahmed Badran - CTO @Magalix
ahmed.badran@magalix.com

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