Big data platform system and running method therefor

The invention provides a big data platform system capable of realizing separation of computation type applications and data, and a running method therefor, and belongs to the technical field of cloud computing and big data. The system can realize decoupling and separation of the applications and the data, and solve the problems of difficulty in migration from applications to data and multi-table associative computing of the data due to a strong dependence relationship between the applications and the data in an existing big data platform technology. The running method for the big data platform system comprises: virtually combining hard disks of a plurality of physical machines into a virtual hard disk; dividing the virtual hard disk into a plurality of storage volumes; and receiving a request and creating a virtual machine (which can be just all of a CPU and a memory of a complete machine, but still is the virtual machine) used for running the request, wherein the storage volumes are mounted for the virtual machine according to the demands of the request.