System Design - Load Balancers

Load Balancing:
- It helps to distribute load across multiple resources.
- It also keep track of status of all the resources while distributing requests. If a server is not available, it stops sending traffic.
- LB can be added at three places:
- Between user & web-server
- Between web-servers & internal servers (Application servers or cache servers)
- Between Internal platform layer & DB
- Types of load balancers:
- Smart Clients
- It'll take a pool of service hosts & balances load, manage them (Detect recovered host, deal with adding new hosts, etc)
- Hardware LB:
- They are hardware which works as LB, but are very expensive.
- Even big companies use them only as first point of contact & use other machanism for load-balancing.
- Software Load balancers:
- It's hybrid approach. HAProxy is popular open source software LB.
- Every client request on this port (where HAProxy is running) will be received by proxy & then passed to the backend service in efficient way.
- HAProxy manages health check & will remove or add machines to those pools.
- We should start with these.
- Ways of load balancing:
- Round robin
- Round robin with weighted server

In this video, we're going to reveal Load balancers used in System Design:
- What is Load balancer
- Where Load balancer can be added
- Types of load balancer
- Algorithms to implement Load Balancing

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[tirupatirao]

Yes before jumping to system design interview questions, this is what we need to know... thanks for the playlist

[VikashKumar-wwhf]

I found this channel yesterday and this is gem thanks for all of your content

[vm]

Was looking for something on system design and this playlist is definitely a jackpot!! Thank you! :)

[vigneshkrishnan]

Thank you very much, Bro. I was able to crack my system design interview with the help of your videos. your videos are great. keep up the good work. kudos!!

[gauravkodande]

Great content, thank you for your efforts.

[NaturalPro]

Simple and effectively explained.Thanks :)

[sherlocked]

Hi, can a single load balancer handle all the incoming requests?

[prashantverma]

can u please provide the slide's link in the description... Thanks

[bcjitu]

Can you please add some psudo code as well ?

[nitreall]

What happens if the load balancer dies?

[qiluo]

This is really good tutorial, may I know if any slides that you can share?

[SuperPrksh]

Thanks for the playlist, sir can you pls share the ppt for our futute ref. Thanks

[sheena]

Please use system design to make a small project in spring boot rest api

[MANISHSHARMA-xksu]

Please make a video on what exactly the system design is....

[niralkoradia]

1 minutes of content is discussed for 10 mins. Need to improve the content.