Load Balancing and Traffic Routing Strategies Simplified | System Design Fundamentals 2022

🔹What is a load balancer?
Load balancing is defined as the efficient distribution of network or app traffic through various servers or server farms so as to reduce the load on any one device.

We start with a very short introduction to DNS resolution. Watch this video to understand how a request is routed to application servers and the different routing strategies involved in making this possible. You will be able to understand why load balancers are a vital component in almost every system that you'll design.

🔹About our System Design Series:
Our System Design Series will help you become better at the skills required to transition from an entry-level engineer to Senior Engineer and eventually become a software architect. We will cover a series of topics ranging from schema design, basics like CAP Theorem, Consistent Hashing, overall system design like Facebook Messenger. Covering these topics, you will be able to intuitively come up with practical solutions to real-life problem statements at your workplace. You will also be able to crack system design interviews at big companies like Facebook and Google!

🔹About the instructor:

The following topics are covered in this video 👇🏼

0:00 Introduction
0:36 Working of a load balancer
10:01 Types of load balancer
12:29 Routing traffic through a load balancer

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#loadbalancing #systemdesign

[bradleyli]

Exactly the type of videos on system design I've been looking for!!!! In-depth and detailed!!

It will be even more helpful if you could provide a list of external references, such as academic papers, blogs, websites, that were used in making this video as I'd like to learn even more in-depth about these topics. Appreciate it!

[punituniyal]

Awesome initiative Mohit and Scalar. Explaining performance engineering and architecture concepts in detail is the need at this time, and thanks to you to publish them for free of cost. The videos are extremely informative and easy to understand.
God bless.

[urmilakajale]

You explained the topic in a easy and simple way, Thank you!!

[rahulvamau]

This was an awesome explanation sir...got a very clear understanding of all the concepts. Thanks a lot

[k.karthickkanagaraj]

Thank you Mohit for explaining the load balancing content 😀 Fantastic video!

[eswara]

Good one, i learnt few which i don't know earlier.

[babujuly]

Thank you Mohit and scaler team for these wonderful sessions which really commendable and need of the time. Really appreciated your efforts regarding this.

[ranganathhittanagi]

very well explained, even a non IT guy can understand this. Thanks a lot @mohit. could you please make a video on designing data platform for apps like hotstar that handles billions of data. Thank you

[rahulvutukuri]

I loved the content and will share as much as i can, also looking to attend scalar events

[pratikdutta]

Great video. Can you please create a video that includes hands-on practice as well?

[mallareddygamannagari]

Well explained. I have one question here.
How do we control the max traffic at load balancer ?
Ex: You have configured your application instances to serve avg volume of traffic but how do you control the traffic at load balancer in case if you get more than 10 times of avg traffic suddenly? because your application servers are not capable of accepting that much traffic suddenly.

[shashankcool]

Thanks Mohit on sharing the content over youtube channel, really liked the way you explained the topic. Awaiting more such videos on system design.

[atulsolanki]

A very good session on the Load balancer, thank you also, Can you give one session about Mysql table partitioning and sharding in depth

[bhavyabansal]

Thanks, so the DNS resolution gives back IP addresses for the gateways and then one of the gateway can be used to reach the application server? Is that right?

[Sampathgayani]

Amazing work bro...thanks for sharing your knowledge.

[harshitrajput]

Good content!
Can you share the link for consistent hashing/hashring ? Also, how does consistent hashing prove advantageous in stateful systems (some practical example perhaps?) and why not helpful in stateless systems?

[Ruhvikakhandelwal]

Good video. You mentioned regarding a link on how typical DNS works. I am unable to find it here. Can you please help me to get it?

[babhijit]

Nicely explained.
Make a video on Statically typed, Dynamically typed, Strongly typed and Weakly typed programming languages.

[prince]

How 4 IP's can be returned by the load balancer? Is there any special configuration done by the load balancer? What if my L7 load balancer is pointing 3 different regions?

[sandeeprana]

Please share the video link for consistent hashing.