The Xen management stack supports SLA guarantees, along with detailed metrics for charge-back.
Xen管理栈支持SLA保障，以及具体的退款标准。
2
Many IT departments do internal charge-back to the application owners for the cost of hosting their applications.
许多IT部门对承载应用程序的成本向应用程序所有者执行内部收费。
3
This is especially critical since most virtualization systems, including WebSphere Extended Deployment, are built on the concept of Shared resources, making fixed unit charge-back inaccurate.