Episode Details

In this episode, Lois Houston and Nikita Abraham, along with Rohit Rahi, look at two important services that Oracle Cloud Infrastructure provides: Compute and Load Balancing. They also discuss the basics of instances. Oracle MyLearn: https://mylearn.oracle.com/ Oracle University Learning Community: https://education.oracle.com/ou-community X (formerly Twitter): https://twitter.com/Oracle_Edu LinkedIn: https://www.linkedin.com/showcase/oracle-university/ Special thanks to Arijit Ghosh, Kiran BR, David Wright, the OU Podcast Team, and the OU Studio Team for helping us create this episode. -------------------------------------------------------- Episode Transcript:

00:00 Welcome to the Oracle University Podcast, the first stop on your cloud journey. During this series of informative podcasts, we'll bring you foundational training on the most popular Oracle technologies. Let's get started. 00:26 Nikita: Hello and welcome to the Oracle University Podcast. I'm Nikita Abraham, Principal Technical Editor with Oracle University, and with me is Lois Houston, Director of Innovation Programs. Lois: Hi there. You're listening to our Best of 2023 series, where over the last few weeks, we've been revisiting our most popular episodes of the year. 00:47 Nikita: In today's episode, which is #5 of 6, we'll listen in to a conversation Lois and I had earlier this year with Rohit Rahi, Vice President of CSS OU Cloud Delivery, on OCI Compute and Load Balancing. We began by asking Rohit why one would use Load Balancer. Lois: So let's get right to it! 01:06 Rohit: You would use Load Balancer to achieve high availability and also achieve scalability. So typically the way Load Balancer works is, they're also referred to as Reverse Proxies, you would have a Load Balancer, which would be used accessed by multiple clients, various clients. And these clients would hit the Load Balancer, and the Load Balancer would proxy that traffic to the various backend servers. So in this way, it not only protects the various backend servers, but also provides high availability. In case a particular backend server is not available, the application can still be up and running. And then it also provides scalability because if lots of clients start hitting the Load Balancer, you could easily add more backend servers. And there are several other advanced capabilities like SSL termination and SSL passthrough and a lot of other advanced features. So the first type of Load Balancer we have in OCI is a layer 7 Load Balancer. Layer 7 basically means it understands HTTP and HTTPS. That's the OSI model. And then there are various capabilities available here. 02:13 Nikita: The Load Balancer comes in two different shapes, right? Can you tell us a little about that? Rohit: One is called a flexible shape where you define the minimum and the maximum and you define the range. And your Load Balancer can achieve any kind of-- support any kind of traffic in that particular range, going from 10 Mbps all the way to 8 Gbps. The second kind of shape is called dynamic where you predefine the shapes. So you have micro, small, medium, large, and you predefine the shape. And you don't have to warm up your Load Balancer. If the traffic comes to that particular shape, the Load Balancer automatically scales. 02:53 Rohit: You can always do a public and a private Load Balancer. Public means Load Balancer is available on the web. Private means your multiple tiers, like a web tier, can talk to your database tier and balance the traffic between them, but both tiers don't have to be public.