2. What Makes Redis Special? | Redis Internals

[@arambh-gaur]

What an outstandingly excellent explaination !!! Yes handling mutexes and semaphores has it's own throughput headaches

[@AsliEngineering]

Thanks!

[@rktpro]

Every embedded systems guy who works with C would find the 'single thread' design just another day in life.

[@rohandvivedi]

RTOS ?

[@kommisettyveerendranath53]

Thank you Arpit, very nice way of explaining the whole concept behind the redis single threaded model.

[@sahajarora2162]

Beautifully explained. Thank you!

[@vikrantkumar4431]

I used sorted redis sets in my company project for leaderBoard 😅, completely removing db here. Fetched the leaderboard combining two scores into one

[@sw9038]

Redis is no longer open source now. Can we use redis community version for commercial websites now? What is the impact of changing the licensing policy for the Redis? Is it only for cloud support? What can I do with my existing redis integrated projects? How Valkey is substitution for Redis? Could you please make a detailed video on this?

[@AsliEngineering]

You can continue using it. It just prevents other companies from offering it as a managed service. No changes on your side.

[@sw9038]

@@AsliEngineering Ok thanks.

[@kalpeshmali8498]

Itni deep me reddis padai hai aapne sir thank you very much sir ❤️🔥🙏🙏🙏🙏

[@tejpalkhachane1965]

Pls add some videos on api performance improvements, error handling in micro services, performance testing of micro services

[@jasonngan5747]

Very great and thorough content! Thanks for the nice work!

[@jivanmainali1742]

Network IO is slow but execution is fast (in memory ) implies it has no waiting data (queue of commands ) to process thus IO multiplexing seems to be a wonderful solution

[@jivanmainali1742]

Hi Arpit , Is there a way we can limit number of tcp connection to redis at application layer in synchronous way ?

[@sakshamjain16]

Use Redis pool to limit connection

[@liveforothers1846]

@arpit as you said redis create connection fromTCP and in a single thread all those connection comes and execute. But i have also seen i can only create one connection in redis and that one connection can also serve as many request as multiple connection does. Which is more scaleble single connection with multiple request or connection per request is the ideal practice

[@chetansharma5514]

@Asli Engineering :- I like the content of your playlist. Request you to make a series on Object storage technology ( a detailed one which covers the internal such as how the data is organised and stored on physical hardware ) .. I have been searching internet for this details but have not found anything so any kind of help would be highly appreciated.

[@amitdahiya8969]

You can go through the book : operating system concepts, it covers Process Management, Memrory management and storage management

[@kaushikdas417]

So the event loop thread is always busy, always checking if something is there to work on?

[@AsliEngineering]

it is not a separate thread.

[@jivanmainali1742]

Also what happens when you have data from multiple socket at a same time ,when you read? @18:00

[@AshokBathini]

Not sure if redis uses epoll; I guess it may be using it. If u use epoll, u need to register fds(sockets) with it and whenever any related socket buffer is full, u get a handle on all those fds, process them sequentially and go back and ask for more fds whose buffer is full/ready to read.

[@sergioliberati9192]

this is a really good explanation 👍👍👍

[@vaibhaves]

Any discount for college students? :D

[@MsTendawa]

every operation is atomic in nature, then how it behaves when the redis in reactive driver (reactive nature)?

[@cnkumar20]

having worked with asyncio of python lib, made total sense. (python is also single process due to GIL)

[@pechimuthu.j7953]

I have a query, how this eventloop works in multi core machines. Blocking calls issue is addressed because of event loop I agree but how we will achive parrallesim with multiplecore

[@AsliEngineering]

It does not work on multi-core

[@AshokBathini]

We have worked on something similar, built our own webserver using epoll systemcall. We just create a separate process per core.

[@nitishagrahari9943]

This channel should gain more reach ❣

[@vineet4991]

Hi Arpit, there will be concurrency issues if we have multiple shards/nodes of same redis instance? Since they both work separately even after being single threaded???

[@Jollyrogger805]

If you are referring to redis cluster, redis network io will still be single threaded thus no concurrency issue

[@akashanand3783]

Very well explained. Thanks a ton😊

[@thenerdycoder07]

Please do internals of kubernetes

[@sumitpatnaik7057]

Sir it might be cringe but i am binge watching for weekend as series 😅 really good content Thanks

[@AsliEngineering]

Means a ton 🙏

[@hackwithharsha]

Hi Arpit, Thank You !! Do I have access to course for life time once i purchase it and also can i do it in python while watching in go lang ?

[@AsliEngineering]

Yes. Lifetime access to the course.

[@hackwithharsha]

@@AsliEngineering Thank You !!

[@大盗江南]

amazing content!!! Thank you!!!

[@StrawHatLuffy750]

Nice you are a great teacher :) i am planning on getting the redis internals but the cost is a bit high😅😅. hopefully would buy it sometime.. will there be more sessions on redis internals??

[@AsliEngineering]

Thanks a ton! Redis videos will not be on KZbin. Have covered them in my course.

[@Ady-ny1gz]

Hey @arpit, thanks for the excellet explanation, appreciate the efforts 🙌🏻 one ques - what iPad app are you using for explaining? it looks very neat, gonna use it for personal uses.

[@AsliEngineering]

Goodnotes

[@madhulikaghosh3876]

Very very nice.

[@subee128]

thanks

[@carlosluque4753]

I am finding these videos so interesting! I'd love you ever make a video like these ones about how HFTS (High Frequency Trading Systems/Applications) work and especially all the optimisations required to achieve processing time in the order of microseconds or nanoseconds. Not sure if it is your area of expertise but I am sure you definitely have the knowledge for it. For example, I know that in many cases, they would avoid the use of threads to avoid waiting time in locks, data locality to take advantage of CPU L1 and L2 caches, lock free data structures, etc. Been reading a book about it recently, super interesting. HFTS is a super interesting topic, would love if you can produce some content :)

[@musafirgauravv]

Redis sounds like Node to me

[@AsliEngineering]

Yes. Both work on the same foundation - event loop.

[@StrawHatLuffy750]

Please make paid series courses with other open source softwares :) in golang

[@AsliEngineering]

Suggest something, I am open for anything and everything.

[@zapfska7390]

*was open source