# Evaluation of WSL 2

## Environment
- OS: Windows 10 Home Edition
- CPU: Intel i3-4130
- Memory: 8GB

## Install
- Download [wsl_update](https://wslstorestorage.blob.core.windows.net/wslblob/wsl_update_x64.msi) and [Docker Desktop](https://desktop.docker.com/win/stable/amd64/Docker%20Desktop%20Installer.exe)
- Run PowerShell as Administrator
- Enable WSL

dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart

- Restart computer
- Install **`wsl_update_x64.msi`** and **`Docker Desktop Installer.exe`**
- Get Linux from [Microsoft Store](https://aka.ms/wslstore)
- Set WSL 2 as default and start

wsl --set-default-version 2
wsl

- Install docker

apt update
apt upgrade
apt install docker.io

## Compare with VirtualBox

| 比較項目 | VirtualBox | WSL 2 |
| -------- | ---------------------------- |:----------------------------------------------------------------- |
| 作業系統 | Popular 64bit OS | Windows 10 / Windows Server 2019 |
| 手動安裝 | 安裝vbox並匯入vm image | 安裝wsl更新檔及Docker Desktop, 輸入PowerShell指令, 過程需要重開機 |
| 自動安裝 | 將vbox和image包裝成installer | 將安裝檔和指令包裝成installer, 過程需要重開機 |
| Effort | 修改現有的ezmaster installer | 需要製作新的installer |
| Usage | 1GB memory | [5GB memory](https://i.imgur.com/aoAR8iu.png)|

## Conclusions
- 安裝步驟繁瑣且需要重開機
- 支援的作業系統少
- Linux只能從Microsoft Store取得 (待確認)
- 耗費的記憶體過高 (可進一步研究如調整)
- 較適合開發者而非一般使用者

## References
- https://docs.microsoft.com/zh-tw/windows/wsl/install-win10
- https://docs.docker.com/docker-for-windows/install/
- https://clay-atlas.com/blog/2020/10/12/windows-cn-wsl-2-memory-config/