Design a collaborative todo list application

[Fei_Dong]

Design a collaborative todo list application. Roblex

大体要求是多人可以在同一个to-do list里面add task，或者complete task。其次是不同人有不同的role，从基础的viewer（可以增加或者完成task），到editor（可以改task名字什么的），到admin（可以创建删除todo list之类的）。讨论内容有API， data model， database选择，如何把某个client的改动及时同步到别的clients里面，一个todo list里面collaborator太多读写流量太大怎么办之类的。

[logic]

挺有意思的题目，除了基本功能以外，还考 permission control。

[markbs123]

老师求指点这两个问题应该怎么解决呢？
如何把某个client的改动及时同步到别的clients里面–这里要求是及时同步，是不是我们必须要用push 方法来做fan-out，这里还有别的地方需要注意吗？
一个todo list里面collaborator太多读写流量太大-- 老师这里我没想通应该用什么方法作比较合理，求指点

[logic]

同步在协作者少的情况下，没有什么特别复杂的，因为数据量小，就是 push 就好。collaborator 很多的情景，就得 pull 了。

[alexsunny123]

@markbs123

The teacher asks how to solve these two problems?
How to synchronize the changes of a client to other clients in time - the requirement here is to synchronize in time, do we have to use the push method to do fan-out, is there anything else to pay attention to?
There are too many collaborators in a todo list, there is too much read and write traffic–Teacher, I have no idea what method should be used to make it more reasonable, please give me some pointers

thanks my issue has been fixed.

[alexsunny123]

@alexsunny123

@markbs123

The teacher asks how to solve these two problems?

How to synchronize the changes of a client to other clients in time - the requirement here is to synchronize in time, do we have to use the push method to do fan-out, is there anything else to pay attention to?
There are too many collaborators in a todo list, Ometv chatroulette there is too much read and write traffic–Teacher, I have no idea what method should be used to make it more reasonable, please give me some pointers

thanks my issue has been fixed.

thanks for the awesome information.