How to deal with two hard drives in nginx?

Question

linux

There is a VPS with two hard drives, this is what fdisk -l displays

Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: HGST HUS724020AL
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 65AB4C9A-AD69-4E04-9C2A-D61ADD385D52

Device          Start        End    Sectors    Size Type
/dev/sda1          40       2048       2009 1004.5K BIOS boot
/dev/sda2        4096 3905976319 3905972224    1.8T Linux RAID
/dev/sda3  3905976320 3907022847    1046528    511M Linux swap
/dev/sda4  3907026944 3907028991       2048      1M Linux filesystem


Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: HGST HUS724020AL
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: D910C5D0-5C8C-4442-A753-453B034D9223

Device          Start        End    Sectors    Size Type
/dev/sdb1          40       2048       2009 1004.5K BIOS boot
/dev/sdb2        4096 3905976319 3905972224    1.8T Linux RAID
/dev/sdb3  3905976320 3907022847    1046528    511M Linux swap


Disk /dev/md127: 1.8 TiB, 1999857713152 bytes, 3905972096 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Images are stored on this server and served via nginx, but how to use the second disk when the first one runs out of space?

Answer 1

If this was just a question about nginx, then there is a try_files directive that tries to find the requested file in different places. Something like:

location / {
  try_files
    /disk_0/images/$uri
    /disk_1/images/$uri
    404;
}

Answer 2

how to use the second disk when the first one runs out of space?

Merge them into LVM, for example.

Answer 3

merge two file systems via aufs
all contents of % directory 1% and % directory 2% are merged and displayed in % assembly %
files with identical emnip paths will be displayed only from directory 1
when writing, the file will be written to the directory in which there is a specified path and there is free space (the selection principle can be configured)
read man aufs - a lot of functionality that requires careful study ..