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On a openVZ containing Deb7 I need to lock the maximum size of a folder, which is used to upload on a php based web server. The directory is synced, so I have to lock the maxsize. MAXSIZE should be upgradable by adding some physical disk later ...

I want to use a file as a block device for a file system. So I have done :

dd if=/dev/zero of=/disk2/filesystem.dat bs=1M count=100

Then, I made the filesystem on it

mkfs.ext4 filesystem.dat

Then I tried to mount it :

mkdir /opt/filesystem ; mount /disk2/filesystem.dat /opt/filesystem

My OpenVZ (it is on a VPS) has no loop module in the kernerl. So I got

Could not find any loop device as usual under OpenVz

So i think I have to use FUSE, but I really do not know HOW ....

Any idea on locking the size of directory under OpenVZ ?

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If you have access to OpenVZ physical node you can create loop device and mount it to VPS. But you can't use loop from OpenVZ VPS because technology restrictions.

As another solution you may call your administartor/hosting provider do something like this: http://www.stableit.ru/2013/11/how-to-mount-multiple-disks-to-openvz.html

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As I supposed, this is a limitation of OPENVZ. A jail is NOT a virtualization.

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