关键词: Web应用服务器集群, 共享集群, 平台即服务（PaaS）, 服务器整合

Abstract: As the existing management of Web application server cluster does not support multi-tenancy and dynamic resource provisioning, it is not appropriate for PaaS (platform as a service) which is an important service of cloud computing. To solve these problems, this paper presents a shared cluster topology based on process isolation to support multi-tenant to share the same physical environment. It further proposes a server consolidation method for this shared cluster to meet the performance needs of the tenant applications and improve the effective resource utilization of the servers. Experiment shows that the platform is able to select appropriate number of servers according to the current state of shared cluster and the server consolidation method is feasible and effective.

Key words:  Web application server cluster, shared cluster, platform as a service (PaaS), server consolidation