architecture

问题 This is more of an architecture/best practices question than anything else, so please feel free to add your two cents. I know i stated status in the title, but this goes for any basic property of an object. I think the account example below will help demonstrate my question a little better than status. Here is a sample Account object: public class Account { private IList<Transaction> _transactions; public AddTransaction(trans as Transaction) { _transaction.add(trans) } } Now lets say I want

问题 This is my first time setting up OpenID Connect with IdentityServer 4 and AspNetIdentity and I was hoping someone could demystify the part about storing user data. What I've read so far is that user data should be stored in the Auth db that is connected to the auth server, but I'd really like to store user data in the resource db too that is connected to the resource server. I currently have a data model that looks like this: I have omitted many of the fields for both User and Event, but you

问题 Basic pubsub architecture question. At a high level, when designing pubsub, I sometimes face a choice between two architectures: Publish mutations or "new-state". Some DB state is mutated, and publishers notify of that change via pubsub. But they include enough information in the message so that the subscriber doesn't need to do a look-up on the DB. Imagine the subscriber has a cache of the DB. It could receive the mutations or new-state, and update its cache without doing a look-up.

问题 I have a photo album system which people can upload photos and interract with other users. I use mySql and Redis to handle traffic and store the data. In my system, users can follow other users, like photos, comment on them and upload new photos. In this scenario, I want to show all events from user's followings on their wall (like facebook timeline). For example, I follow users 30,40,50,60,70 and 80 ids. Whenever they add a new photo, I would like to see them on my wall. The problem is this

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 12 days ago . Improve this question Encryption at-rest - is storing data inside your storage/database in encrypted format. During processing you need to decrypt data every time, calculate something and then encrypt everything back (encryption is managed by storage). Does encryption at-rest resolve

问题 I'm trying to compile my app through Xcode, everything has always worked, but suddenly today I return this error that makes the build fail. I attach the complete log of the error. Thanks for your help. Undefined symbols for architecture arm64: "_chkstk_darwin", referenced from: PTArchiveWriter::write(std::1::basic_string<char, std::1::char_traits<char>, std::1::allocator<char> > const&, std::1::basic_istream<char, std::1::char_traits<char> >&, std::1::basic_string<char, std::1::char_traits

问题 I'm trying to compile my app through Xcode, everything has always worked, but suddenly today I return this error that makes the build fail. I attach the complete log of the error. Thanks for your help. Undefined symbols for architecture arm64: "_chkstk_darwin", referenced from: PTArchiveWriter::write(std::1::basic_string<char, std::1::char_traits<char>, std::1::allocator<char> > const&, std::1::basic_istream<char, std::1::char_traits<char> >&, std::1::basic_string<char, std::1::char_traits

问题 I have a project with microservice architecture (on Docker and Kubernetes), and 2 main apps are written in Python using AIOHTTP and Django (also there are and Ingress proxy, static files server, a couple more made with NginX). I'd like to split these Python apps into separate smaller microservices, but to accomplish this probably I also should move authentication in a separate app. But how can I do this? Probably I should also add that I'm asking not about specific authentication methods like

问题 I have disassembled a small C++ program compiled with MSVC v140 and am trying to estimate the cycles per instruction in order to better understand how code design impacts performance. I've been following Mike Acton's CppCon 2014 talk on "Data-Oriented Design and C++", specifically the portion I've linked to. In it, he points out these lines: movss 8(%rbx), %xmm1 movss 12(%rbx), %xmm0 He then claims that these 2 x 32-bit reads are probably on the same cache line therefore cost roughly ~200

问题 I have disassembled a small C++ program compiled with MSVC v140 and am trying to estimate the cycles per instruction in order to better understand how code design impacts performance. I've been following Mike Acton's CppCon 2014 talk on "Data-Oriented Design and C++", specifically the portion I've linked to. In it, he points out these lines: movss 8(%rbx), %xmm1 movss 12(%rbx), %xmm0 He then claims that these 2 x 32-bit reads are probably on the same cache line therefore cost roughly ~200