| 摘要 |
<p>A service, e.g. web applications, can have user interfaces (web tier), processing logic (application tier), and data storing (back-end tier) implemented by intra-connected virtual machines (VMs). A method (A1-A14) is provided for migrating such a service from a source (e.g. server 315) as a unit. It comprises discovering (A1) characteristic information indicating the source VMs and their intra-connections and copying (A6) the source VMs into corresponding target VMs on target server 336 according to the characteristic information. Reconfiguration information of at least one selected target VM which indicates that the source identity has been translated to a target identity is then saved (A7-A8). The source/target identity is the IP address and hostname for a network domain of the source/target server 315/336. Reconfiguration and characteristic information are used to redirect each communication addressed to source identities to the corresponding selected target VMs, the communication being from intra-connected target VMs.</p> |
