Data transfer control system for virtual machine system
US5257386A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1991 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Apr 3, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/54
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A virtual machine system includes a storage for storing at least transfer priorities of virtual machines, a queuing part for making a queue of data transfer requests which request data transfers between a main storage and an external storage and are received from operating systems which operate on each of the virtual machines, a limiting part for limiting a transfer data length of one data transfer which is requested by each data transfer request in the queue of the queuing part depending on the transfer priority of the virtual machine from which the data transfer request is received, so that a data transfer is made in divisions if the requested transfer data length exceeds a length limit determined by the transfer priority, a generating part for generating a first data transfer request in place of each operating system with the transfer data length determined by the limiting part so as to start a first data transfer between the main and external storages, and a calculating part for calculating a data length of a remaining transfer data which remains to be transferred when the first data transfer is completed and for automatically generating a second data transfer request requestin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.