Add missing Airbnb's blog posts

README.md

@@ -48,6 +48,10 @@ Numerous organizations frequently share their insights and expertise, encompassi
 
 ### Blog Posts
 
+* [Riverbed: Optimizing Data Access at Airbnb’s Scale](https://medium.com/airbnb-engineering/riverbed-optimizing-data-access-at-airbnbs-scale-c37ecf6456d9)
+* [Improving Performance with HTTP Streaming](https://medium.com/airbnb-engineering/improving-performance-with-http-streaming-ba9e72c66408)
+* [Improving Istio Propagation Delay](https://medium.com/airbnb-engineering/improving-istio-propagation-delay-d4da9b5b9f90)
+* [Upgrading Data Warehouse Infrastructure at Airbnb](https://medium.com/airbnb-engineering/upgrading-data-warehouse-infrastructure-at-airbnb-a4e18f09b6d5)
 * [Automated Incident Management Through Slack](https://medium.com/airbnb-engineering/incident-management-ae863dc5d47f)
 * [Detecting Vulnerabilities With Vulnture](https://medium.com/airbnb-engineering/detecting-vulnerabilities-with-vulnture-f5f23387f6ec)
 * [Alerting Framework at Airbnb](https://medium.com/airbnb-engineering/alerting-framework-at-airbnb-35ba48df894f)