Moving from MONOLITHS to MICROSERVICES 🎂 → 🍰🍰🍰

[@gkcs]

Migrations require extensive testing, refactoring and care. To learn more about system design, head to interviewready.io

[@saket37]

"You don't shift to microservices when your users scale. You shift to microservices when your team scales." Golden words.

[@amanlonare4319]

That’s Conwoy’s Law!!! :)

[@piyushgupta7582]

That's not really 100% true or thumb rule, microservice adaption also depends on increasing user scale. Increasing load on specific service gives invention to move to microservice and design system around adding dedicated DB and other components to that service and horizontally autoscale service.

[@deepakpandey9406]

That's partially true 👍

[@mychildschannel6076]

@@piyushgupta7582 well said

[@iamshivarth]

This is not complete truth at all.. Team scales when there is a heavy load on the service. Team scaling happens when service become too complex to handle and that is why micro services concept came. Gaurav has given indirect statement.

[@nativeKar]

Just completed migrating from Monolith to Micro Service, now even my dreams are fragmented!

[@niketanmishra4410]

Can u help me out a little too.. im in a similar process

[@Nexatek]

Could you also please make a video on the approach and pain points. Mistakes and corrections etc.. Thanks

[@overunityinventor]

We have same name. 👍

[@engohtimah3707]

Hello, I have a similar requirement, can you help me out?

[@Jam.S.]

Such a pragmatic approach you show us. Other KZbinrs are just going by the theoretical way of doing things. Thanks a lot Gaurav.

[@smithmarta]

Fantastic summary on moving from a Monolith to Microservices! You are briefly touching upon CD/CI. It would be great to see an intro video on CD/CI and migration to this deployment methodology.

[@gkcs]

Thanks, will do!

[@sameerarote1129]

impressed by your editing skills :)

[@mayurlanjwar8799]

Just wanted to tell you that I have been selected in Oracle, Canada. Your videos really helped me a lot. Thanks for helping me. Love your content and the way you explain. Keep up the good work.

[@gkcs]

Thank you and congratulations!

[@unnatagarwal1475]

Most important part was when not to have a separate service. Great content.

[@WittyGeek]

Damn Gaurav! This is almost exactly how my company works internally for microservices and almost the same way we think about whether we should make a new service or not. Well done. Peach of a video!!!!

[@gmt8336]

One of the best KZbin Chanel on tech

[@menofculturehead9370]

I am new to system design. Learned a lot. Will make it sure to watch all your videos. Great content. 👌👍🏽

[@gkcs]

Welcome aboard, thank you!

[@sankalparora9374]

12:17 Those animations of the architecture were quite nice!! Thanks for the vid!

[@gkcs]

Thank you 😁

[@sidharathroy2929]

Great work! I recently joined a new role where they keeping on talking about these micro services. This week only I was planning to study about microsevices and your video published at the same time. Thanks :)

[@jatinbansal321]

3 years of engineering experience and had worked on couple of services but still it add some value every time I watch your content.

[@asheeshkumar1424]

Thank you for microservice intro. I am having hard time to get things done in microservice than monolithic arch. Thanks a lot.

[@pran322]

I am awed, just a great presentation, content and delivery

[@svrohith9]

No one had ever told me this clear.

[@benneteapen]

Finally! An explanation that makes sense. Thanks and good job Gaurav...

[@vaibhavmehta36]

Came to know about Lucene. Thanks for such amazing content.

[@BehindSeas]

the best video I could find about the topic.

[@gwho]

14:25 was baller and very helpful for deciding in a concrete manner.

[@rijabratachakraborty8743]

Monolithic for life! They are big, they are stable but pain strikes when there is an update or bug fix or simple infrastructure patching! :-)

[@bossofyoutube]

That's a good demo... I'm just into microservices, having a separate db for each microservice makes sense when we speak about source of truth but the updating a single user info (profile, payment, sessions etc) into each db is bitbtiresome and sometimes may violate ACID when we consider all db transactions... any suggestions on fault tolerance please like maintaining consistency even on a failure

[@AlokLaha-te2pd]

Awesome Gaurav. You are really adding value to our life. Keep up the good work.

[@gkcs]

Thank you!

[@sonaligoel4270]

Brilliant !! and Thank you.. You made all the complex stuff easy to understand

[@gkcs]

You're very welcome!

[@MultiPIYUSH1992]

always I watch your videos when am free I always find interesting and refreshing my brain. keep uploading and keep going on.Thanks, Gaurav :)

[@大盗江南]

amazing Gaurav, i will buy ur courses... without any doubt!

[@RohanKumar-zm6cx]

i literally thought he was a college student but salute to you sir.

[@amithecode]

3:55 smooth bhaiya ji smooth

[@gkcs]

That animation took me 10 minutes to make, so thank you!

[@subs_hk]

explanation is to the point, clear & very practical approach one can find.

[@rkumarjay]

Explained well in simple terms, crisp and clear. Thanks

[@sangeethasubramanyam2804]

Hi Kiddo, you are probably half my age.But I watch your videos quite often for learning. Keep doing the good work!!

[@kiplimocollins]

Superb video, extremely informative. Also kindly can you do a video on becoming a Software Architect?

[@elimpune]

Great video. Give me lots of ideas for my project. Thanks!

[@jasusyb2734]

3:30 it is about monorepo vs polyrepo. monorepo can can b microservice as well. that is different

[@aat501]

you're an incredible teacher

[@iamshivarth]

Gaurav you have good teaching skills.

[@dhruvikdonga4569]

slowly add new features using microservice to the monolith architecture so that old monolith code becomes a part of microservice

[@manabsaha5336]

Loved the title 🎂 -> 🍰 🍰 🍰

[@akshatrb]

Why do I, a 3rd yr Btech, like watching GKCS videos on system design or microservices when I should be working on my CS fundamentals instead? :(

[@gkcs]

I believe it helps. Some of my CS fundamentals got stronger after reading about the challenges of distributed systems.

[@deepakpandey9406]

You should work hard on improving your basic fundamentals. Learn Generic, Parallel Programming and Datastructure.

[@mitejmadan8672]

I am watching gcks from 1st sem (now in 3rd sem). These videos motivates and encourages me to study more. Sometimes you can easily connect dots between some concepts

[@rushivachhani8615]

If there are two services: 1 - Auth 2 - Profile(just provide profile data) once I get authenticated from service 1 now I want to my profile details from service 2 how come service 2 will know that this guys is already authentic and authorised to use this service every request at first will have to pass through this 1-Auth every-time?

[@ashishranjanpatel4756]

Deployment is easier as well as hard. totally depends on the impact of code change.

[@opuchakraborty]

I loved this video, explanation is simple

[@2307vineyard]

Even if neither of client or team scales, we may need to break the monolith into micro services because of poorly designed/developed application with too many simultaneous feature changes/bug fixes. Greatly appreciate any design/engineering examples of similar use case.

[@harisridhar1668]

11:30 Hi Gaurav - can you clarify Kafka and Lucene/ElasticSearch here? Why do we need both a Message Queue like system ( Kafka ) for storing logs, when logs are timestamped themselves generally? Can't we just dump the log output into ElasticSearch/Lucene databases as we go?

[@darshandev1754]

What are your thoughts on the video about "microservices" from "Continuous Delivery" youtube channel

[@kau5hal10]

Bruh moment at 8:16. "what happens if my library is not up to date?" 😂😂

[@mohinicoder]

Nice explanation. Can we say that monolithic may give faster response than Microservice? In case of Microservices we might need to get data from different services through network but in case of monolithic everything is present in the same project. Though we are started using Microservice architecture in our project I was unable to explain that in an interview because of lack of clarity. Thanks for this Video.

[@gkcs]

In some cases yes. But a monolith may be sharded by user ranges also. You can now have a look at the "Sharding" video 👍

[@prakhar8690]

Amazing Gaurav, I really understood some of the things. Really valuable

[@sheeraz1022]

Thanks Gaurav for giving us this amazing explanation. I would probably write a blog post and write the whole of the summary which you have mentioned.

[@mrrishiraj88]

Awesome analogy in title!🙏👍

[@StillVeryLazy]

When different Microservices create connections with single DB for data fetch/post etc., Is there any challenge since database has to maintain different connections with those requests because maintaining more connections may increase Network load?

[@bhushanpoorkar8482]

What is the Importance of DDD in creating a new MicroService or migrating to it? Can You make a series of videos on how to use DDD?

[@gkcs]

Have a look at Uber's blog on this.

[@basdfgwe]

Some of the benefits you're talking about microservices make it sound like monoliths have code in file (per se) and every service in a micros service interwoven like a saghetti. The reality is that the code changes in monoliths are just as easy. Imho the primary reason of microservices is scale -( I E you scale the service individually based on demand).

[@sankalparora9374]

Thanks for the detailed video !

[@KusanBiswas]

Damn Gaurav! Really impressed with the lucidity of your explanation!

[@uhejshalom]

Last few seconds are worth it.

[@anuragbapat2222]

You are a great content creator Gaurav! Waiting to see you get your own Udemy or Unacademy course!

[@gkcs]

Thanks Anurag! It's here: get.interviewready.io

[@Aditya-us5gj]

He's beast. When he saw your comment, he went straight to build his own website to help you out 😝 That's how much he loves us !!

[@anuragbapat2222]

I have watched every single video on this channel and improved at my current role significantly! Gaurav is a star ⭐

[@prabhakarbhat2477]

It's time to migrate from microservices to monoliths 😎🤘🏼

[@ankurpremmasih8207]

What a useful video man. Amazing Gaurav.

[@ashwinhariharan310]

Very good explanation. Succinct yet clear.

[@ashishranjan4597]

Can you give your input on designing common configuration server for Microservices. I don't have to use Spring Cloud Config server.

[@hitanshumehta4313]

I think the definition of the monolith you gave is a bit misleading. It is the definition of monorepo. I have seen projects which contain all the microservices in the same repo. Eg. Google uses monorepo, but obviously, not all of its services are released together. So, according to me, monoliths are the applications that have to be deployed as a single unit. Please correct me if I'm wrong.

[@gkcs]

I mentioned monoliths need to be deployed as a single unit. Not sure where you found the video misleading, could you give me some more details?

[@hitanshumehta4313]

@@gkcs Sorry for being unclear and if I missed something. I'm just talking about the definition you gave at 00:23, not the complete video. Apart from that, Big fan of your videos. Keep them coming 🔥

[@riddhi123456]

What should be the testing strategy for microservices architecture?

[@ivailotenevv]

Awesome Gaurav, keep uploading :)

[@nizarkadri3109]

I just completed my master's degree and got an interview for senior full stack developer.... Thanks a lot gaurav, thiis video really helped me! What do you guys think, is this a good decision to start my career directly as senior full stack developer.

[@gkcs]

Congratulations Nizar! All the best!

[@rahulbera454]

Isn't Message queue would be a single point of failure ? If two services rely on a message queue for communication.

[@gkcs]

@Dr3w 97 That's right. I made a video on this earlier.

[@himanshubhatt9912]

There also you will have multiple brokers like kafka you can go through it how it works so it won't be a single point of failure

[@rahulbera454]

@Dr3w 97 Thanks Got your point !!

[@RFsalman]

hi, is this 7:50 what commonly referred to as anti-corruption layer ?

[@lihewang6532]

my org has 200 people working for a single service, four to six teams need to release together every time, even though release frequency is already twice a week. It is really a nightmare.

[@deepyad76]

A well explained concept.... thanks

[@avishjain7375]

Load Balancers are connect with CDN? or It is DNS will take your request to CDN and then comes the LoadBalancer in cases of cache miss?

[@avishjain7375]

kzbin.info/www/bejne/qJTOl4FtraucnZI

[@VamsiM]

One word, Excellent.

[@the-gray-haired-developer]

Hi Gaurav, instead of physically separating the code base, is there any way we can keep all the code in single repo and still achieve microservices benefits ?? Or is it very must to have separate code repo for different micro service.

[@gkcs]

Have a look at monorep

[@gnanasekaran5533]

I often watch videos at 1.5x speed. This video at normal was match to that.

[@gkcs]

I'll take that as a compliment 😛

[@wizardkashy3133]

I don't understand the separation advantage of microservices. wouldn't there still be a separation in the monoliths themselves? Also, would there be any security concerns for microservices? How do they communicate with each other?

[@gkcs]

Have a look at this: kzbin.info/www/bejne/p4rLg6l-btl9gdk

[@muratkhan1453]

You can ofcourse make separation in your monolith application using modularity and this is actually a great and a MUST approach to break down your monolith app before movi it to microservices but since you deploy your monolith app as one big applocation, even it is modular, you wont get benefit of microservices. And yes there is more security issues involved with microservices. since instead of 1 application, tou need to protect each of MS and secure entire communication between...

[@SatyaUpendra]

Can you please do a Video on Service Oriented Architecture vs Microservices?

[@adityajoshi2806]

Hi Gaurav, do you have kind of sample dataset regarding the decomposition of monolithic systems into microservices

[@iamsantoshmishra]

Good explanation 👍

[@harshal.rathore]

So what I underestands from this is that Microservices and Monoliths are not an actuall thing they are methodology or terminology. Monoliths is one big code base with in a single file with all the features packed in it and microservices is a term for breaking that code base into small small code bases according to their features and then they are called microservices. Am I correct?

[@salamatburzhuev434]

What is the size of the team which is considered to be "small' ?

[@yashwanthd1998]

How to handle failur of a single service and data consistency

[@vickyanand6483]

Hi , I have one question. How to deal if there is change in output from downstream services in microservice architecture. And upstream has to be notified of the change. Note: Downstream service is up and running .

[@charan775]

the senpai is back!

[@sonugupta147]

Hello sir, I want to design a webpage which would use an ml model to process the requests like a home pricing model, image classification model. So which architecture should I use to design my system ? would the microservice architecture be good or the monolith ?

[@saikun0293]

Awesome explanation!

[@JbtheBoss1892]

Good content Gaurav!!

[@NoamSalomonski]

separation of concerns is true for all software in all granularity levels. Weather monolith or not. The argument that microservices implement it and monolith doesn't is plain wrong.

[@doaamm1493]

thanks for your useful videos

[@gauravkumar796]

Won't it come with an overhead of database replicas specially analytics and reporting database .. we need to maintain copies and make sure they are in sync ?

[@gkcs]

Yes, the maintenance cost could go up. The data cost will be similar though (you can use the same database node to create different databases). The replica and sync cost would be true even for a monolith.

[@gauravkumar796]

@@gkcs thank you for your response :)

[@MuhammadFauzi999]

Thanks Gaurav, do we need api gateway before call auth service or another services? And also, do we need build the api gateway of mobile app and web app separatly?

[@prasanjitmitra]

Is Having a independent db for service is preferable or maintain common db for all service , or making a service stateless? Will the data ingestion from external source gets difficult if the db is scattered!!

[@gkcs]

The service databases being independent is a good idea (could be served on the same node, but are independent databases).

[@pankajjagtapp]

Very helpful.. Thanks!

[@priyankasmenon1146]

sahi hey, kuch sikha aaj ,Thanks

[@teolcd]

Not quite correct for for first sentence, monolith can be organized into multiple module/plugin that can be anywhere. And same for microservices, it can be organized into one repo, less work on publishing shared lib, schema etc.

[@stackdeveloper6614]

Awesome! How can we integrate different frontend micro services into a single app?

[@techiegroups5151]

Where can I find the course details, and in website it shows three different modules. Is it all separate cost

[@indiansoftwareengineer4899]

Loved your all videos.

[@pranavp8023]

It’s very difficult to go back to monolith architecture after working on micro services.

[@GautamKumarSamal]

How to deal with a breaking changes with micro services f.e. a change in the contract?

[@gkcs]

I've discussed this part in more detail on get.interviewready.io

[@saisravan7356]

Isn't it we need to maintain copy of data that we push in queue parallelly in db too. so if any failure of queue u can still have the backup data to push into queue so no data is lost?is it a right approach?

[@gkcs]

Do you mean retries in queues? Yes they are used.