Datacenters have become the fundamental infrastructure of modern internet services such as searching, social networking and online shopping. The resource utilization of typical datacenters, however, is quite low. The primary reason of such low utilization is that datacenter operators have to upload resources to online services that are latency sensitive. Co-locating multiple applications in a shared datacenter is an effective approach to improve resources utilization but can result in degradation of application’s quality of service (QoS) because of interference between online services and other background workloads. Therefore, QoS guarantee method in a shared datacenter becomes the key technology for improving resourcing utilization of datacenters. In this paper, a survey of research efforts on this topic was firstly presented and then a programmable architecture for resourcing on-demand (PARD) was reviewed. The goal of PARD is to make hardware to support resources management so that the QoS of key applications can be guaranteed while multiple applications execute together in shared datacenters.