넷플릭스 마이크로서비스: 생일 기능 구현의 과제

### 마이크로서비스의 복잡성과 넷플릭스의 감정적 혼란
* 😩 화자는 여러 마이크로서비스와 관련된 백엔드 디자인 문제로 인해 **생일 날짜를 표시하는 데 어려움**을 겪으며 감정적 혼란을 느낀다고 불만을 표출합니다.
* 📅 이 프로세스에는 **빙고와 같은 다양한 서비스를 호출**하여 사용자 ID를 검색하고 **울나 같은 다른 서비스를 통해 유효성을 검사**한 후 최종적으로 **라쿤에서 사용자 정보를 가져오는 과정**이 포함됩니다.
* 🐷 블랙 미러의 '돼지' 에피소드에 대한 언급은 **화자의 업무 경험이 시리즈에 제시된 주제와 깊은 공감을 불러일으킨다**는 점을 강조하며 화자가 쇼와 정서적으로 연결되어 있음을 시사합니다.
* 🔄 발표자는 블랙 미러의 에피소드 순서를 바꾸려고 할 때 직면했던 어려움을 설명하며, **비디오 메타데이터를 효과적으로 관리하기 위해 GPS 및 VMS와 같은 여러 서비스**가 필요함을 강조합니다.
* ⚙ 런타임에 논리적 재정렬을 처리하기 위해 **CMS(콘텐츠 메타데이터 서비스)**가 도입되어 사용자에게 정확한 에피소드 정보를 전달하는 데 필수적입니다.
* 🛠 연사는 웹사이트 팀의 반발로 인해 **시스템에서 플래그 이름을 변경하는 과정**에서 겪었던 어려움을 이야기하며 대규모 조직 내 협업의 복잡성을 설명합니다.
* ⏳ 결국 화자는 간단한 목표를 달성하는 데 **"4개월이나 걸렸다"**며 긴 과정에 대한 패배감을 드러내면서 마이크로서비스 작업의 비효율성을 강조합니다.
* 💔 이러한 기술적 도전으로 인한 감정적 고통은 소프트웨어 개발의 혼란 속에서 **사랑과 의미를 찾기 위한 투쟁**에 대한 유머러스하면서도 가슴 아픈 성찰로 이어집니다.

갈락투스는 넷플릭스 마이크로서비스의 압도적인 복잡성을 상징하며, 혼란 속에서 사용자 중심의 기능을 제공하기 위한 노력을 강조합니다.

there we go we added these three marker microservices let's go here we go three years I'm still not understanding this why is it so hard to display the birthday date on the set I can already feel so many emotions coming up inside of me I know we haven't

even started but you guys just don't even know you don't even know what happened to me you don't even know about Black Mirror you don't know about the Pig episode this it hits so home to me because the pig that I will literally never be able to

recover from watching this video but we're gonna do it settings page why can't we get this done this quarter look I'm sorry we've been over this it's the design of our backend first we have to call the Bingo service see Bingo knows

everyone's bank I'm sorry about the screen tearing okay again I'm switching to sway March 13th okay Nemo so we get the user's ID out of there then from Bingo we can call papaya and MBS to get that user ID and turn it

into a user session token we can validate those with ulna and then once we have that we can finally pull the user's info down from raccoon foreign so does anyone know about Black Mirror on Netflix anyone familiar with Black Mirror did anyone watch Black Mirror before

Netflix purchased Black Mirror type 2 if you watched Black Mirror before Netflix owned Black Mirror which was starting season four did anyone watch it season three and less okay um I got a story for you we're gonna do a story here very very soon but first

let us become emotionally damaged by what we're about to see, which this is effectively a documentary of working at Netflix, doing large things, but couldn't the raccoon team basically just... no, raccoon isn't guaranteed to have that info before we

do this, we have to go to Wingman, do a query to see if the user's willing. I love the Wingman and Apex. I just, so I'm just very happy they they named a service called Wingman, to take it to the next level, or if they're just playing

the field now. Wingman is cool, but he doesn't store any user info himself. He has to reach out to other user info provider services like RGS, Barbie doll, Ringo 2, BLS. But how does it know what all the user provider services are? Well, for that it

has to go to Galactic, all-knowing user service provider. I just hate this. Why do we make this? Why did the world do this? Why did we do this to ourselves? We have a world in which was not that great and we replaced it with an idea that felt better

and now we have Galactus. Why is this? Why? Why aggravator? And what Galactus has omniscient knowledge of all current user info providers. It doesn't have future sight or knowledge of past user info providers, so it expects a time range to get all

the current user info providers. We need to pass a time range with the current time and a time representing the end of the universe, which we get from Eks, our entry chaos service. PKS, it's being deprecated at the end of the month for Omega Star, but Omega Star

still doesn't support ISO timestamps like they said they would a month ago no no no no no no oh my goodness we have such so until Omega Star gets their act together we're blocked we can't get

signed up for our use case we can't use EKS there's nothing we can do so Galactus won't be able to find our new birthday boy provider which means Wingman won't know how to talk to anybody which means I won't be able to

find true love and I'll die alone laughs I'll die alone without ever knowing love without ever knowing it's my birthday it's birthday blocked okay we're blocked you sad pathetic little product manager they just okay product managers don't know the pain that's going on here they don't

they can't they cannot under they cannot feel it he has a notepad trying to write down what's happening he doesn't feel it deep down you think you know what our users want you know nothing of my pain of Galactus's pain you think you know what it takes to tell

the user it's their birthday you know nothing delivering this feature goes against everything I know to be right and true and I will sooner lay you into this barren Earth than entertain your folly for a moment longer [Music] alright so clearly this is a blocker uh no

problem wishes out another two to three years or so learned a lot today love Galactus uh but we'll talk next week about adding middle names to the profile awesome sounds good take care ah it's just so painful it's just so painful to see so when I was working at

Netflix uh oh my goodness where's my marker there it is got it When I was working at Netflix um during my time there which I'm still there by the way uh we had this beautiful thing okay that's way too big what is happening here okay well this is

this is not this is not this is not what I was hoping for and make it smaller yep make it smaller and yeah there we go So while my time at Netflix has been fantastic there was this time in which we need to do a little show called Black

Mirror and it sounds like a lot of people are pretty familiar with Black Mirror now I wanna I want someone to type into the into the chat PF if you know what the first episode's about type PF in the chat if you know if you know about the first episode

okay for those that don't know what PF is it's called Pig um Yes you heard me correctly Pig and uh at my job I had several meetings in which involved the phrase pig to be said a hundred separate times it was wild and so we came up with this idea okay hear

me out is that we Netflix are producing season four there are three seasons before us season three season two season one and we thought you know would be way better is instead of showing you the first episode S1 E1 instead we're gonna show you S4 E1 which

means you couldn't just reverse sort it right you couldn't just okay this is a reversed sort ordering because then you get S4 E6 I think I think there's six episodes in season four and so you couldn't do that you could not

just simply reverse it so what we have to do is we have to reverse the season so we'd have to have a reverse season but not a reverse episode now this caused a lot of problems in our system the reason why it caused a lot of

problems in our system is quite simple there's a few different things that need to come into play here okay so first off there is GPS GPS would calculate your lolomo your lolomo of course is the list of list of movies that exist on Netflix it's when you go there you scroll

through it that's what you're going to see okay list of list of movies pretty straightforward uh GPS has nothing to do with the map but shockingly enough a service called map would call into GPS and get the skeleton of your GP of your lolomo and then fill

it in more dynamically right be able to get things going on so you'd see something like this inside GPS GPS would produce a list of shows and one of them would be say like Black Mirror now it's probably gonna choose Black Mirror S1 E1

and so map has to be smarter and map needs to go well wait a second s1e1 isn't actually the latest episode or the episode we should be promoting instead we need to be promoting S4 E1 so map itself doesn't know anything about what

is latest about videos that is where something called VMS comes in VMS oh my goodness sorry VMS VMS VMS video metadata service right but video metadata service doesn't actually hold is that video about a dentist service that's actually all that he did about video

about the latest and so video metadata service actually used something called, if I'm not mistaken, Dexter, which has a lot of the data about it. It also had a second service that provided other data about it. I can't remember the name of that service. Okay. And so VMS was very

very important, but VMS didn't know anything about ordering. It just used raw data out of Dexter, and we didn't want people to have to reverse order in Dexter and go back through and do that. We can't do that because then it's going

to get all screwed up because here's the deal is though we're delivering all these things down. We need a way to be able to identify them uh by their their season counting and all that. So we also had like this metadata service about it such as like their season name,

their season and episode number. So if you just had season one be replaced with season four, it would come back as S1 E1, which is incorrect. So the metadata service also couldn't just have things out of order because metadata service also relied on this. So now that we have

that we needed something else. So then came in a glorious thing called CMS, content metadata service. So content metadata service's real job was actually to provide a service that would do these kind of more logical reorderings at runtime and not at service time. That way we

could have these really beautiful items in here. And so that way, Map actually called into content metadata service to make sure it was delivering the correct thing. But here's the problem, there was more things that needed to happen because then on the front end you'd have

to call in and get your lol amo and then we would receive these but the problem is when you're on your low level your list of list of movies what happens when you look at your Seasons well they're not reversed because we are still currently using VMS for our middleware

so our middleware needed to start using CMS but the problem was is that API uses the API service Gateway pattern which means that we now have things such as get you know get metadata 2 we literally had get metadata 2 because get metadata can't just be

deprecated you can't just you can't just undo these things so we actually had to develop a second babe to do this but here's the problem how did you know you need to call this well we actually had to create another service I forget what it was even called at this point that

would tell you if this video needed to be reordered based on flags at a separate system which I can't remember what it was called so when you combine all these systems together this was how microservices happened this is how we reversed episode ordering at Netflix

okay and I love the charge on this one okay I did that I did that it was a lot of fun it took like four months oh you know what the worst part about it is that I didn't get to really choose a lot of the names

and so there's this problem that happened on website uh website because one of the flags that would come down from this service up here which you can barely see was hidden episode numbers right and so that was a runtime decision that had to be made and the website

couldn't support it being on the server side so it had to be on the client side so we'd actually send down those flags to the client and the client would then not display it because we just didn't have time for another service right here to do the

mixing of all these things right so we had that and so we had to do that but here's the problem is the website team uh the website team they hated this name and so I had to do a whole code review and then not allow these names to take

place because this implies actually not visible and they didn't want a not visible they wanted the name to be said in a way that's not complicated so we had to then after making all the changes and everything was uniformly ready to go someone said hey we can't do this and I

just said hey I mean this is just the name of the flags I think it's better just to stick with the names throughout you know it's not the name I would choose but whatever and of course that didn't work out so I had to then do a

quick refactor rename things and that's that it was it was the worst experience of my lifetime all this so that the Pig episode wasn't the first thing you saw can you fix the no uh let's see why not just a rate of uh reverse on the front

end did you not hear oh my goodness I feel like I just did an entire story why not were you not even paying attention were you not even paying attention to this whole thing I I just EX don't be coming into this chat with your VS Code vibes all right you

Keep that out. You keep that out right now.

MircroServices (and a story about Netflix) | Prime React

This is a place for all the things that are awesome on stream. 

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생일 날짜 표시의 어려움 및 블랙 미러 비유 소개

초기 문제: 설정 페이지에 사용자의 생일을 표시하는 데 어려움이 있습니다.

블랙 미러 '돼지' 에피소드를 언급하며 문제에 대한 화자의 감정적 연관성을 설명합니다.

여러 서비스(빙고, 파파야, MBS, 울나, 라쿤)와 관련된 백엔드 복잡성에 대한 기술적 설명입니다.

블랙 미러의 비유를 사용하여 넷플릭스 시스템의 복잡성에 대한 이야기로 전환합니다.

넷플릭스의 복잡한 마이크로서비스 아키텍처에 대한 설명

사용자 정보 검색과 관련된 다양한 서비스(너구리, 윙맨, RGS, 바비 인형, 링고 2, BLS, 갤럭틱, Eks)에 대한 설명입니다.

화자가 시스템의 복잡성에 대해 불만과 혼란을 표현합니다.

갈락투스와 그 한계, Eks와 오메가 스타에 대한 의존도에 대한 자세한 정보입니다.

오메가 스타가 ISO 타임스탬프와 호환되지 않아 차단이 발생합니다.

차단기는 생일 기능이 구현되지 않도록 합니다.

결론 및 넷플릭스 스토리로의 전환

문제를 해결하는 데 더 많은 시간이 필요한 중대한 차단 요소로 식별됩니다.

넷플릭스에서 진행한 프로젝트에 대한 개인적인 일화를 소개합니다.

발표자의 개인적인 넷플릭스 프로젝트 작업 경험.

넷플릭스의 '돼지' 에피소드 재정렬 문제

'돼지' 에피소드를 먼저 보여주지 않도록 블랙 미러 에피소드의 순서를 변경하는 문제에 대해 논의합니다.

단순히 순서를 뒤집을 수 없는 이유에 대한 설명.

관련된 다양한 서비스(GPS, 지도, VMS, 덱스터)에 대한 설명입니다.

논리적 재정렬을 처리하기 위한 CMS(콘텐츠 메타데이터 서비스) 도입.

API 서비스 게이트웨이 패턴에 대한 설명과 '메타데이터 가져오기 2' 생성에 대해 설명합니다.

웹사이트 구현의 어려움과 네이밍 충돌

웹사이트에서 에피소드 재정렬을 구현할 때의 어려움에 대해 논의합니다.

서버 측 제한으로 인한 클라이언트 측 구현에 대한 설명입니다.

서비스 이름 지정 규칙을 놓고 웹사이트 팀과 갈등이 생깁니다.

코드 리팩토링 및 이름 변경 프로세스에 대한 설명입니다.

전체 프로세스와 그 복잡성에 대한 최종 고찰.