Classic Process
- Dev and Ops with a different priorities
- Dev => Implementing Features
- Ops => Stability of System/Application
DevOps
- Dev & Ops with a same mind set, Deploy ASAP
Class SRE implements DevOps
Site Reliability Engineering (SRE)
- SRE is the way google deploys & maintains Applications
- Define the Following
- SLI (Service Level Indicator)
- SLO (Service Level Objective)
- SLA (Service Level Agreement)
SLI
- Any important metric that is measured over a certain period of time
- Eg:
Latency < 100 ms over last 5 mins
page response < 1 sec over last 5 mins
Service Level Objectives
- Metric over a larger period of time
- Eg
Application will be up 99.95% of the time over last month
Service Level Agreement
- Get an agreemnet with the customer on Some SLO and if it not met you are supposed to pay the customer with some rewards
