Questions tagged [file-systems]
techniques to organize and store files with their data on a computer.
101 questions
2
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2
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105
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How to Design a Secure Script for Conditional File Access Based on Time and API Conditions?
I want to create a secure script that grants access to files based on specific conditions. The access should be controlled by both time-based and API-based conditions. The script should only allow ...
- 33
1
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2
answers
177
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How to store an encrypted filesystem in a single file on disk on multiple platforms (maybe not portably), or alternatives
I'm in the very conceptual phase of designing an open source password manager that provides distributed Vaults that can be simultaneously accessed and managed from multiple devices with the promise of ...
- 111
2
votes
1
answer
98
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What are some architectures and designs I could use to optimize the performance of file text data lookups?
I would like to write a program that essentially handles text data and metadata of files locally on a machine's filesystem. There is no need for any network activity. I am working with large ...
- 1,152
0
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0
answers
31
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Enabling file editing on a file stored on a server through custom routes and POST/GET Requests
I am creating a platform which allows multiple users to edit a file simultaneously and I was wondering if using a web server with routes could be the correct architecture for this goal. I am trying to ...
- 115
3
votes
3
answers
680
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File I/O - How HDD or SSD works with OS file system? [closed]
I've studied how data transfer with secondary storage(HDD or SSD) works.
Would you mind to check that my understanding is correct?
File system
block is basic read/write logical unit which is used in ...
- 133
0
votes
1
answer
233
views
How handle many files effectively?
I'm looking for a way to work with a huge amount (~10^9) of files (all sizes) in .NET using unspecified file system (NTFS, BTRFS...).
What I have done up to now is to store them in evenly in a folder-...
- 103
-1
votes
1
answer
86
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File system for abstracting S3 object storage
We're looking for a scalable way to implement a file browser feature backed by a robust object storage system for the files. We were looking at an S3 compatible service, such as MinIO for this. Since ...
- 1,219
0
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2
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339
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Building a program that truly deletes everything
We all know that if we delete a file, the operating system is recycling it but doesn't actually delete it. It just removes it from the directory indexes, and until the data is needed and overwritten, ...
- 127
0
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2
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131
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Delete filesystem data associated with database record by delete hook, or internally in service logic?
Let's have many rows in the SQL database where every record has an image property that holds the path to file in the filesystem. Many database libraries have the ability to set-up hooks that are ...
- 165
0
votes
1
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472
views
Large file uploading in chunks
How to upload large(mb/gb) of video files from client to app server?
The solution as of now I know is pretty simple and widely used is to break file in chunks at at client side and send http post ...
- 81
1
vote
1
answer
532
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Custom File System Index/Cache - How to save index
I've got an extremely oniony(deep) folder structure which contains Appx 1,000,000 text-based files on a network share. Using windows search is extremely slow and unreliable. I've created some text ...
- 379
5
votes
1
answer
2k
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Why use strong checksums to detect random errors in a filesystem like btrfs?
Btrfs supports crc32c, xxhash, sha256 and blake2b as checksums when storing and reading files. crc32c and xxhash are designed to detect random errors while sha256 and blake2 are considered ...
- 61
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0
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31
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(Installable) File System Driver, Shell Extension Handler or another approach?
I have an application that does some document handling as part of its functionality. I would like to implement a "Drive" emulator that would allow users to navigate and manage documents as ...
- 111
-3
votes
1
answer
218
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Small scale document management system architecture / patterns
Im usually working with line of business desktop software. Mostly based on a single database.
Pretty often one of the requirements is to keep track of some files. Or the only way to implement a ...
- 99
-4
votes
1
answer
295
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When to use dot files in Git repositories?
My Git repository contains dot files required by my tooling:
.dockerignore
.gitignore
.pre-commit-config.yaml
I'm using Azure Pipelines for CI/CD, which is typically defined in azure-pipelines.yml, ...
0
votes
1
answer
79
views
PHP: What code should be removed to its own helper class and where should such classes be located in the filesystem?
The following is an example requesting an explanation for one specific file in one specific filesystem, not helper classes generally.
I have configured a LEPP stack on a CentOS server. The server ...
- 111
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1
answer
4k
views
fake filesystem for unit tests
I am writing an application in c++ and Qt5.
It would be very convenient for me to create a virtual file system so I can unit test code working on files.
I have found that in Qt4 there was a ...
- 117
0
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1
answer
76
views
Test logging library
I've been designing and developing a very scalable logging library for a while.
The main goal of this library is pretty simple. Like many others projects, a simple goal does not mean a simple way the ...
- 111
6
votes
1
answer
611
views
Solving file system dependency with database storage
I have a software project A which makes API calls to a third-party software B that is heavily based on data stored on the file system. Also, those software and file systems are distributed on servers ...
- 245
2
votes
0
answers
125
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Is it possible to implement insert file operation in modern extent-based filesystems?
The problem was already discussed here. But there was not consensus on this topic.
I have some thoughts on how insert operation can be implemented for some popular file systems. If FS has extent-...
0
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1
answer
186
views
I'm building a file management app and need to know the best approach for dealing with folders
So you open up file explorer on your computer and can create folders, add files, rename, etc. I'm doing the same thing in a web application that interacts with the file system on the server.
I'm ...
- 115
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2
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338
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Hosting a file system in production?
Sorry if this is broad. But I'm confused on how to scale a file system.
I'm currently working on the server side of a webapp with Node(Express)js, its file system module, and mongoDB.
I'm storing ...
- 21
2
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0
answers
155
views
What is the most efficient way to find filesystem changes in percentage?
I am planning to write a program that will produce digest logs for file changes in a particular directory. The idea is that whenever a file is deleted in a particular directory, it will show up in the ...
- 21
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vote
1
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575
views
How to access a user's local file from a web application?
I am working on a web application which allows users to review pdf documents. These documents are submitted from another public facing website. A typical workflow involves:
A document is uploaded on ...
- 127
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3
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348
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How to append a chunk of fixed size data to a file and make sure this chunk doesn't get fragmented on disk?
So i want to understand how DBMS implementation works
To give an example :
MySQL implements each tables with its own pages, which are 16KB
so each table is a file, and is a multiple of 16KB, ...
- 141
2
votes
3
answers
128
views
Does a replicated distributed file system minimise the need for durability?
I've been investigating various distributed file systems, like Gluster, Ceph, Moose and Lizard.
I'm also familiar with various key/value store type systems, some of which do not perform any system ...
- 674
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votes
4
answers
2k
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Why do disks write data in chunks of page size?
In my understanding, even if i want to overwrite a byte in middle of a file, OS and/or disk will read the content of the size of page, modify one byte and then write the contents back.
What is the ...
- 251
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2
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1k
views
Referencing custom Python modules and data files
I'd want to deploy my Python code and relevant static files such that only a copy of a folder is needed. That is, all the paths inside are relative. The release is to a web server, which calls scripts ...
- 377
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1
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2k
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Chat application - write to file and then save in database
I have followed this approach that is described here to implement a simple chat application: https://code.tutsplus.com/tutorials/how-to-create-a-simple-web-based-chat-application--net-5931
I'm ...
- 119
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323
views
Detect when a file is created (on a webserver) and ready for use in one of many directories
I have an odd, intermittent bug that is happening on a web server.
One of the methods triggers the creation of a small file (3kb), in a folder. The folder is based on the current year, month and ...
- 253
3
votes
2
answers
2k
views
Store file in filesystem, and its metadata to the database atomicly
I have to store many pdf/jpg/png file of max 10mb in a filesystem, and need to save their metadata on a database.
The SFTP and the DB may be on different nodes. On WS, I've a local db where I can ...
- 133
0
votes
1
answer
319
views
Using A XML as a Directory File To support A file Managing Application
Second Year Software Engineering student here.
I want to make a file managing system for a C# notetaking app, every note will be represented by a file and will display a small preview of it, ...
- 139
12
votes
2
answers
724
views
Does a file system "see" the storage device as a (very large) byte array?
I want to know how does a file system write to and read from a storage device.
I think this is how it works:
A file system doesn't access the storage device directly, but rather the storage device ...
- 335
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vote
0
answers
119
views
Classiest file system locations for my Linux app to write its files?
I have an application I am writing on Linux. It is a Java webapp intended to be run on Tomcat. When it initializes, my application will copy some standalone java utility programs to the host ...
- 119
5
votes
2
answers
508
views
Dealing with potential failures when appending data to a file on disk
I'm designing an application that will be appending blobs to a file on disk (local filesystem) and I'm currently thinking of how to deal with consistency issues that could occur if:
The application ...
- 557
3
votes
4
answers
1k
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Can file systems be designed and implemented in an OS-portable way?
Given the interfaces that major OSes (Windows, macOS/OS X/Mac OS X, Linux) provide to file systems, can file systems be designed and implemented in a way that is largely independent of OS?
I'm not at ...
- 1,664
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245
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Controlling permissions for content on web server (pattern/architecture)
I’m working on a proof of concept for a personal project and am unsure how to go about handling ‘permissions’ on content that is uploaded into the application.
Problem:
In this application users ...
- 119
1
vote
6
answers
1k
views
What are the benefits of storing data contiguously?
I am designing an application file format which will store chunks of user data, ranging from a few bytes to a few gigabytes - median size probably in the 10MB - 30MB range.
I have the option of ...
- 423
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votes
1
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269
views
One row database table or JSON file
If I have data that I will only need to update very rarely (once a month), would it be a good idea to use a JSON file instead of a database table with only 1 row?
- 1,908
25
votes
1
answer
7k
views
What is the name for the non-extension part of a filename? [closed]
Given the file path:
/some/path/abc.txt
The filename is "abc.txt", and extension is "txt".
What is the "industry standard", unambiguous name for the "abc" part?
For reference, in both java's older ...
- 2,036
-1
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1
answer
353
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How do you create a Composite file in C++ [closed]
I am looking to create a "Composite file" in C++, basically a composite file is a file containing files, (examples: .docx, .jar, etc) these files can usually be renamed as .zip and opened with a .zip ...
- 107
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votes
2
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4k
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Storing Local Filesystem Paths in Database
I'm developing a webapp where I have sets of data stored locally on my computer and I run a tool which transforms the data and uploads it to my webapp. However, I need to be able to rerun the tool on ...
- 159
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vote
1
answer
3k
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Storing uploaded images for website
I'm developing a website (using PHP, JS, and MYSQL) which allow user to upload images. My requirements are as below:
User is able to upload 1 or multiple images at a time.
Website is able to save ...
- 125
6
votes
3
answers
1k
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Why would anyone want to build a file system for windows? [closed]
I saw an ad on StackOverflow today for a project called WinFsp.
The site mentions the following features:
Allows for easy development of file systems in user mode. There are no restrictions on what ...
- 429
3
votes
1
answer
1k
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VBA Outlook: quickly find subfolder
I have the following structure in my Outlook Public Folders.
-Public Folders
--1001_RandomProject
--1002_AnotherProject
--1003_Yetanotherproject
...
and so on, basically there's a couple of thousand(...
- 143
2
votes
1
answer
1k
views
What is the most sensible design for making files available for download from a URL?
This is what I need to do, in a nutshell:
Generate Excel spreadsheet files (programmatically).
Store these .xlsx files in a location where they can be accessed by users later. These files need to be ...
6
votes
3
answers
2k
views
What's the point of hidden files?
What is the point of hidden files? In Microsoft Windows they exist, in Mac OS X they exist and in Linux they exist. It seems to me that it just makes detecting malware more difficult. The only upside ...
- 216
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votes
2
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685
views
What are non-folder files called? [closed]
What term should be attributed inside the code for files that are not folders, in order to differentiate them from folders?
If I need to write 2 functions — isFolder() and isFile() — the 2nd one has a ...
- 49
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vote
2
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344
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Can version control systems use the filesystem log to capture changes?
I was trying to find a "perfect" syncing program between a network share and a local folder, when I realised that it's probably impossible to do it right unless all the filesystem operations were ...
- 155
25
votes
4
answers
6k
views
Why is the Git .git/objects/ folder subdivided in many SHA-prefix folders?
Git internally stores objects (Blobs, trees) in the .git/objects/ folder. Each object can be referenced by a SHA1 hash that is computed from the contents of the object.
However, Objects are not ...
- 4,887