Data replication across nodes of a multiprocessor computer system
US6049853A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1997 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Aug 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1072
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
For a multiprocessor computer having shared memory distributed across multiple nodes, a method and system for dynamically replicating data such as program text stored in memory on a first node to memory on a second node for use by a process executing on the second node. In response to a page fault generated by the process in accessing data, a determination is made whether the data is present in the memory of another node. If so, memory is allocated on the process's node for the data, and the needed data is copied from the other node to the process's node. The process's page table entry for the missing data is then modified to contain the physical address of the allocated memory, where the data is now stored. The method is implemented in a preferred embodiment by using novel data structures linked to the data structures that are typically created when a file is mapped to a process's virtual address space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.