architecture

问题 I'm new to data governance, forgive me if question lack some information. Objective We're building data lake & enterprise data warehouse from scratch for mid-size telecom company on Azure platform. We're using ADLS gen2, Databricks and Synapse for our ETL processing, data science, ML & QA activities. We already have about a hunder of input tables and 25 TB/yearly. In future we're expecting more. Business has a strong requirements incline towards cloud-agnostic solutions. Still they are okay

问题 We have a monolithic web based CRUD application (call it A ) which does a certain task. Now, we have a new requirement which is more or less independent of A functionally. The audience is different, the times of use, the functionality etc. are all different. Because of this, we decided to build this into a new service B . The problem started when B required authentication information from A . Anticipating that this might happen again, we pulled out the auth from A and put it as separate

问题 In my application I want to provide the user with a small undo functionality. There aren't many actions than can be undone by the user. Particularly the actions are: Add notes to an object Color an object Tag a objcet with a string Now I thought about how to implement this. I first thought of a Action Class that is the abstract base class for the 3 different actions that can be taken by the user. Every time the user takes on of these actions, a new appropriate instance of a subclass of this

问题 I'm trying to get familiar with unit testing in PHP with a small API in Lumen. Writing the first few tests was pretty nice with the help of some tutorials but now I encountered a point where I have to mock/ stub a dependency. My controller depends on a specific custom interface type hinted in the constructor. Of course, I defined this interface/implementation-binding within a ServiceProvider. public function __construct(CustomValidatorContract $validator) { // App\Contracts

问题 I am having a hard time actually finding the difference between a Generalization and a Specialization, and when to use either one. Can anyone enlighten me? Eventually also an illustration using UML 回答1: Animal is a generalization , Dog is specialization. Your superclass is a generalized class , but your subclass will be a specialized inheritor of your superclass. It becomes more specialized and less generalized as you move down the inheritance hierarchy . Generalization Generalization is the

问题 Is there a better way to expose a widget to two or more streams from different BLoCs? So far I have been using nested StreamBuilder 's for as many streams as I need listening to like the pasted code below. Is this a good practice? StreamBuilder( stream: firstBloc.stream1, builder: (_, AsyncSnapshot snapshot1) { return StreamBuilder( stream: secondBloc.stream2, builder: (_, AsyncSnapshot snapshot2) { return CustomWidget(snapshot1.data, snapshot2.data); } ) } ) Using rxdart operators like

问题 Consider we have a RootView and a DetailView . DetailView has it's own BindableObject, let's call it DetailViewModel and we have scenario: RootView may be updated by some kind of global event e.g. missed internet connection or by it's own data/view model When RootView handling event it's content is updated and this is causes new struct of DetailView to be created If DetailViewModel is created by DetailView on init, there would be another reference of DetailViewModel and it's state (e.g.

问题 We are developing a multitenant app using .net core and EntityFramework. There will be a single deployed instance of APIs but multiple DBS( one DB per user). So what's the best strategy change DB connection string as per-user context. 回答1: Set the connection string in the OnConfiguring method of DbContext , by calling UseSqlServer , or whatever your database is. In this method, you need to have a reference to some service that will provide the user-specific connection. For this, IMO, the best

问题 How system memory (RAM) is mapped for GPU access? I am clear about how virtual memory works for cpu but am not sure how would that work when GPU accesses GPU-mapped system memory (host). Basically something related to how Data is copied from system-memory to host-memory and vice versa. Can you provide explanations backed by reference articles please? 回答1: I found the following slideset quite useful: http://developer.amd.com/afds/assets/presentations/1004_final.pdf MEMORY SYSTEM ON FUSION APUS

问题 How system memory (RAM) is mapped for GPU access? I am clear about how virtual memory works for cpu but am not sure how would that work when GPU accesses GPU-mapped system memory (host). Basically something related to how Data is copied from system-memory to host-memory and vice versa. Can you provide explanations backed by reference articles please? 回答1: I found the following slideset quite useful: http://developer.amd.com/afds/assets/presentations/1004_final.pdf MEMORY SYSTEM ON FUSION APUS