FS Simulator

This project creates an unix-like filesystem and implements its main algorithms to create, delete, copy and move files. The main functionality is exposed using a Rest API which is consumed by a web page.

How to run it

After cloning the project:

Go to project's location
Run ./gradlew bootRun
Open the web application http://localhost:8080/v1/fs-simulator/

Rest API

Swagger UI is included with this project so the Rest API can be easily explored. The Swagger UI can be found at: http://localhost:8080/v1/fs-simulator/swagger-ui.html

Architecture Specs

Blocks = 1K
Disk file = 1 MB
inode list = 4 blocks = 16 inodes per block = 64 inodes in total
1 directory = 1 block = 1K
1 directory entry = 16 bytes (2 bytes: inode number, 14 bytes: name)
Given above's point: 1 directory will contain 64 entries

Main Objects

Object	Description
Boot Block	It mocks the boot block with a size of 1K. It is located at block #1
Super Block	Contains the LIL and LBL. The size of super block is 2 blocks = 2K
Inodes List	The inodes list contains all the inodes of the system. It uses 4 blocks of 1K. Each inode uses 64 bytes, given that, each block contains 16 inodes, so in total we have 64 inodes in our system
Data Blocks	8th node is used for root directory, so free blocks start from 9th block.

Available Commands

Command	Description	Usage
createdir	Creates a new directory	createdir [--private] [directory name]
createf	Creates a new file	createf [--private] [file name]
removef	Removes a file or a directory (must be empty)	removef [file name]
copyf	Copies a file or direcotory into a target directory	copyf [file name] [directory]
listdir	Displays directory's content	listdir
showf	Displays file's content	showf [file_name]
gotodir	Move to the directory indicated	gotodir [dir_name]
clear	Clear the terminal	clear