Best Site Reliability Engineering Online Training Ameerpet
                     Understanding SLAs, SLOs, and SLIs for SRE Success
A Practical Guide for 2025
www.visualpath.in +91-7032290546
Introduction to SRE
 What is Site Reliability Engineering (SRE)?
A discipline that applies software engineering 
principles to infrastructure and operations problems.
• Why it matters:
Ensures scalable and highly reliable systems.
www.visualpath.in +91-7032290546
What Are SLIs?
 SLI: Service Level Indicator
A measurable metric that indicates service performance.
 Examples:
oUptime (availability)
o Latency (response time)
o Error rate
o Throughput
• Purpose:
Foundation for setting goals and tracking reliability.
www.visualpath.in +91-7032290546
What Are SLOs?
 SLO: Service Level Objective
A target value or range for a service level, based on SLIs.
 Examples:
o "99.9% of requests must succeed over 30 days"
o "Latency must be under 200ms 95% of the time"
• Purpose:
Aligns engineering focus with customer expectations.
www.visualpath.in +91-7032290546
What Are SLAs?
 SLA: Service Level Agreement
A formal contract with penalties if the agreed 
performance is not met.
 Examples:
o "99.5% uptime per month or 5% fee reduction"
• Key difference:
SLAs are legally binding; SLOs are internal goals.
www.visualpath.in +91-7032290546
How They Relate
Pyramid Illustration (verbal layout):
 Base: SLIs – the raw data
 Middle: SLOs – internal targets using SLIs
• Top: SLAs – customer-facing commitments based on 
SLOs
Message:
Start with SLIs → Define SLOs → Commit to SLAs.
www.visualpath.in +91-7032290546
Why These Matter in 2025
 Customer Expectations: Higher than ever in 
digital services
 Business Impact: Downtime = lost revenue & trust
 SRE Success Depends On:
o Clear metrics (SLIs)
o Realistic targets (SLOs)
oAccountable commitments (SLAs)
www.visualpath.in +91-7032290546
Best Practices
 Set realistic SLOs before committing to SLAs
 Monitor SLIs continuously
 Re-evaluate objectives regularly
 Prioritize error budgets (balance innovation vs. reliability)
• Use SLOs to guide engineering efforts, not just measure 
them.
www.visualpath.in +91-7032290546
Conclusion & Takeaways
 SLIs, SLOs, and SLAs are foundational to 
SRE success
 They drive reliability, accountability, and user 
satisfaction
 Focus on measurable, actionable, and aligned 
goals
• Regular review ensures long-term system 
health.
www.visualpath.in +91-7032290546
For More Information About 
Site Reliability Engineering
Address:- Flat no: 205, 2nd Floor,
   Nilagiri Block, Aditya Enclave,  Ameerpet, Hyderabad-16
   Ph. No: +91-998997107
     Visit: www.visualpath.in
      E-Mail: [email protected]
www.visualpath.in +91-7032290546
Thank You
Visit: www.visualpath.in 
www.visualpath.in +91-7032290546