The control files for Virtual Machines are stored in the path /var/lib/one/<vm-id>. The images subdirectory holds the Virtual Machine disk images.

The Virtual Machine files management is performed by the Transfer Manager drivers. You can enable, disable or add new drivers in oned.conf.

The included drivers can be used to implement different scenarios, please read the following guides to understand the advantages of each one, and how to configure them:

• Shared File System
• Non-Shared File System

A set of LVM drivers are also included, although the idea behind these scripts is not to provide a full-blown LVM solution, but a basic example which can be tailored to fit a more specific scenario.

Note that the modular design of OpenNebula allows you to easily extend or create new drivers for your existing architecture. Follow the Transfer Manager Driver guide to learn how to tune and extend them.

When a new Image is registered, its file is copied or downloaded to the front-end path /var/lib/one/images. This file movement is managed by the Image Manager driver. Unlike the Transfer Manager drivers, only one Image Manager driver can be defined in oned.conf. To customize this driver, please read its reference guide. A quick introduction is in the Image Repository guide.