Http Long Polling，Websockets，AJAX輪詢，伺服器端事件

在本視頻中，我討論了系統設計中使用的關鍵輪詢機制。我已經通過示例討論了以下主題。

長輪詢
網路套接字，
AJAX輪詢，
伺服器端事件

這是常見的系統設計面試問題之一。這也將幫助您決定在系統設計中選擇哪種輪詢。

這是whatsappsystem設計的視頻https://youtu.be/oOU4bdyLqJM，它討論了websockets。

#reachgoals
＃系統設計。

Sayantan Ray說道：

2020年4月16日上午5:56

Good pointers to start!!!
Abc Cancun說道：

2020年4月16日上午5:56

Great short video on web communication! Probably should cover webhooks as well
Adroit Aayush說道：

2020年4月16日上午5:56

itna harbadi kis baat ka bhai
accha se to samjha dete
Hari polnati說道：

2020年4月16日上午5:56

Hi Sir ,

I found your channel luckily ?.

Your videos are amazing ?? ??

Please continue this and
if possible please do real time coding example on distributed transaction(Saga pattern )

I heard Axon framework implemented on top of saga for Distributed transaction and also
Paxos framework from google or 2pc , 3pc commits also we can achieve this

Please give me some clarity on this about the differences

Thank you ?
learn spring說道：

2020年4月16日上午5:56

I would like to know about the database design of microservice. The scenario is given below
Microservice A is using mysql database. If I am creating multiple instance of microservice A

1) Each microservice A should point to the same database (common database for all instances) or

2) Each microservice A points to its own private database

If each microservice A instance points to its own private database how to sync the data of each instance? Can you please explain the best way.

can you make a video about it?

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