On the Linux platform, is there any software that can create virtual files that point to multiple files to avoid duplication of space?

Running platform: CentOS

Requirements: similar to this

/opt/virtual.file points to: /opt/1.file /opt/2.file /opt/3.file

First of all, I know the merge command, but this will create a new file and take up space

What I want is to access /opt/virtual.file, ​​which is equivalent to the system dynamically merging these three files into one and accessing them as one

This requirement is not a request to merge js/css using nginx_http_concat

In order to ensure stability when uploading files, upload them separately according to 5M/block. Although you can also use a program to merge these blocks, is there any software that allows the system to make virtual files and point to these blocks? No need to merge

Reply content:

Running platform: CentOS

Requirements: similar to this

/opt/virtual.file points to: /opt/1.file /opt/2.file /opt/3.file

First of all, I know the merge command, but this will create a new file and take up space

What I want is to access /opt/virtual.file, ​​which is equivalent to the system dynamically merging these three files into one and accessing them as one

This requirement is not a request to merge js/css using nginx_http_concat

In order to ensure stability when uploading files, upload them separately according to 5M/block. Although you can also use a program to merge these blocks, is there any software that allows the system to make virtual files and point to these blocks? No need to merge

This must be implemented using fuse, and written by a master: https://github.com/schlaile/c...

1. Install and compile concatfs

   <code>yum install fuse fuse-devel
   git clone https://github.com/schlaile/concatfs.git
   cd concatfs/src
   gcc -Wall concatfs.c `pkg-config fuse --cflags --libs` -o concatfs
   cp ./concatfs /bin</code>

2. Start a directory using mounting method
   Original directory:
   /opt/www/website/
   It contains files
   index.html test.html
   Create a directory to be mounted
   mkdir /opt/www/website_mnt
   Execute
   concatfs /opt/www/website/ /opt/www/website_mnt
   No error is reported and it is already running in the background

3. Create a special filename containing -concat-

   As long as -concat- is included, it will be specially parsed by concatfs

   <code>vim /opt/www/website/1-concat-.txt</code>

   Content

   <code>index.html
   test.html</code>

   Note that the end column also needs to have a carriage return character LF, otherwise the last file will not be loaded

4. Now visit /opt/www/website_mnt/1-concat-.txt and the data after merging these two files will be returned
   It is equivalent to the two files being dynamically merged, but in fact they are not merged physically
   Note It is the website_mnt/1-concat-.txt directory
   Access the original directory website/1-concat-.txt It is still the original file

5. PS: There is no test of writing /opt/www/website_mnt/1-concat-.txt