# SKeyerror/Psyduck

Record CS knowlegement with XMind, version 2.0. 使用 XMind 记录 Linux 操作系统，网络，C++，Golang 以及数据库的一些设计

Repository: https://github.com/SKeyerror/Psyduck
Canonical: https://ross.abutalabs.com/products/psyduck
Language: Go
License Family: other
Topics: xmind, os, golang, network, linux, database
Last push: 2022-08-14T06:21:24+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 1960, "days_push": 1480, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4410, forks 512 (observed 2026-08-28T04:08:48.464326+00:00)

## What it is
A collection of computer science study notes organized as XMind mind maps, covering Linux, networking, C++, Golang, databases (MySQL/InnoDB), distributed systems, middleware, and Kubernetes. It provides both .xmind source files and exported PDFs for each topic.

## Use cases
- review operating system fundamentals like CFS scheduling and POSIX condition variables
- study how MySQL InnoDB indexes, MVCC, and replication work
- prepare for backend engineering interviews on TCP, epoll, and Linux network programming
- learn Golang and C++ core concepts through structured mind maps
- understand distributed systems and middleware design basics
- download xmind files to build a personal CS knowledge base

## When to choose
- you prefer visual, mind-map style notes over long articles
- you want curated deep-dives into MySQL internals, Linux, and networking fundamentals
- you are preparing for backend/systems interviews and want concise structured review material

## When to avoid
- you need executable code or tools rather than study notes
- you need up-to-date content, as the latest release was in 2022
- you require a license permitting redistribution of the material

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation, developer-tools
- domain: operating-systems, databases, networking, developer-tools, tutorials
- platform: cross-platform
- tags: xmind, mind-maps, computer-science, interview-prep, mysql, golang, cpp, linux, kubernetes, distributed-systems

## Member repositories
- SKeyerror/Psyduck (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:48.464326+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:21:03.711586+00:00, confidence not recorded.
  - readme: https://github.com/SKeyerror/Psyduck (fetched 2026-08-28T04:08:48.464326+00:00, sha 162cf8f3df26)
- Data as of 2026-08-30T08:39:29.467469+00:00.