enqueuezero/site

Enqueue Zero is creating code principles.

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Enqueue Zero

Kia ora! I am the creator of Enqueue Zero (https://enqueuezero.com), a site that explains code principles to Developers / DevOps/ Sys Admins. This site is updated under a single man team since 2018.

• Architecture | Algorithms | Programming | Projects
• Changelog

FAQ

Q: I want to know more about XYZ. Where should I ask?
A: Create a GitHub Issue to me.

Q: I found something wrong. Where should I report?
A: Reporting via GitHub Issue or sending a pull request is fine.

LICENSE

Enqueue Zero (c) by Enqueue Zero Limited, 2020

Enqueue Zero (c) by Ju Lin, 2018-2019

Enqueue Zero, including all its posts, is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

You should have received a copy of the license along with this work. If not, see https://creativecommons.org/licenses/by-nc-sa/4.0/.

site's Issues

Status Site

[New Post] Microservices Architecture

[New Post] Multiple Tiers

• Overview: Multiple-tiers is a common architecture pattern in Data Center design.
• Use: data center, cloud.
• Pros & Cons:

[New Post] Nontrivial Web Architecture

load balance, app, cache, database, blob, search, mq, workers, scheduler, in-memory db, log, tracing, etc.

[New Post] WSGI

• Why WSGI?
• Basic Concepts
• Booming Web Frameworks
• Advantages and Disadvantages
• Resources

vim

[New Post] The Architecture of Istio

[New Post] Data Pipeline Architecture

topics: broker, storage, etl.

Deployment

Explain popular deployment paradigms:

• 12 Factor Deployment.
• Capistrano (Mutable Deployment)
• Kubernetes (Immutable Deployment)

Concepts:

• Config.
• Artifacts.
• Resources

awk

[New Post] ASGI

• Why ASGI?
• Basic Concepts
• Event Driven Paradigm
• Advantages and Disadvantages
• Resources

Markdown Parser

[New Post] Event Driven Architecture

ag

[New Post] User Management System

Few engineers really well think of how register & login implemented. It's not complicated but also full of corner cases. OSS packages like flask-user, devise provide good examples. It's good to document that as a thorough post for home-brewed user management systems.

Bitap & Fuzzy Search

The post will introduce how to wrap bitap algorithm with beautiful APIs for fuzzy searching.

[New Post] LinkedList

• Basic Concepts
• Algorithms
• Recursive-based
• Loop-based
• Use
  • Redis
  • File System
• Conclusions

HTTP

[New Post] Sidecar

[New Post] CQRS

CQRS v/s CRUD

The Architecture of Netflix

autojump

SOLID

Explain some basic architecture rules.

[New Post] Compute Entity

To discuss what compute entity should you use: small vps, bare metal, faas, kubernetes, data center, etc.

[New Post] Health Check Endpoint

• Context: to monitor app's health
• Use
• Solution:
  • implement http api endpoint for health check.
  • introduce pull/push based monitoring tools.
    • nagios/sensu
    • ping tools
• Diagram
• Pros & Cons
• Potential topics:
  • actionable alerts.
  • SLI
  • application overload?
  • false positive alerts.
  • network issues.
  • dns issues.
  • SSL issues.
  • missing ping - unknown health.
  • readiness & liveness.
  • ping & http & tcp?
  • secure?

Twitter accounts went silent

Both https://twitter.com/enqueuezero and https://twitter.com/TechshackWeekly stop updating since February.

[New Post] The Architecture of SQLAlchemy

The post https://www.aosabook.org/en/sqlalchemy.html is quite good, however, in Enqueue Zero, I prefer to discuss more on why instead what & how.

[New Post] Heatmap

Talk about heatmap in monitoring.

Missing Action for Pod/Node Death and Rescheduling

In https://github.com/soasme/enqueuezero/blob/master/kubernetes-in-a-nutshell.md

This line If a pod or underlying node, the controller will start a new pod in the cluster. seems to be missing a verb. I think you're looking to say "If a pod or underlying node dies..."

coroutines

After reading https://enqueuezero.com/concepts/coroutine.html, I'm still a bit confused.

In Python, when we talk about coroutine, what springs to my mind is the generator syntax, for and yield.

Also you said:

Asymmetric coroutines
Needs a function to suspend itself. It is yield.
Needs a function to resume coroutine. It is for.

Do you have a better understanding on that? Why do you say Python uses symmetric coroutine?