Linux platform, there is no software can make virtual files to point to multiple files, avoid duplication of space?

Operating platform: CentOS

Requirements: Like this

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

First, I know the merge command, but this creates a new file and takes up space

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

This requirement is not a request to merge Js/css with Nginx_http_concat

Because when uploading the file in order to ensure stability, according to the case of 5m/block upload, although you can also use the program to merge these blocks, but there is no software can let the system do virtual files, point to these tiles, so you can not merge

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Operating platform: CentOS

Requirements: Like this

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

First, I know the merge command, but this creates a new file and takes up space

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

This requirement is not a request to merge Js/css with Nginx_http_concat

Because when uploading the file in order to ensure stability, according to the case of 5m/block upload, although you can also use the program to merge these blocks, but there is no software can let the system do virtual files, point to these tiles, so you can not merge

This must be done using fuse, as well as written by the Great God: https://github.com/schlaile/c ...

2. Install the compilation Concatfs

   yum install fuse fuse-develgit clone https://github.com/schlaile/concatfs.gitcd concatfs/srcgcc -Wall concatfs.c `pkg-config fuse --cflags --libs` -o concatfscp ./concatfs /bin

4. To start a directory by using Mount mode
   Original directory:
   /opt/www/website/
   Contains files inside
   index.htmltest.html
   Create a directory to mount
   mkdir /opt/www/website_mnt
   Perform
   concatfs /opt/www/website/ /opt/www/website_mnt
   It's running in the background without an error.

6. Create a special file name that contains-concat-

   As long as the inclusion of-concat-will be CONCATFS special parsing

   vim /opt/www/website/1-concat-.txt

   Content

   index.htmltest.html

   Note that the end column also needs a carriage return LF, otherwise the last file will not load

8. Now /opt/www/website_mnt/1-concat-.txt the access will return the data after the merging of these two files
   The equivalent of these two files are dynamically merged, actually not physically merged
   Note is the website_mnt/1-concat-.txt directory
   Access to the original directory website/1-concat-.txt is still the original file

10. PS: There is no test write /opt/www/website_mnt/1-concat-.txt case

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