| 摘要 |
PROBLEM TO BE SOLVED: To transfer many user programs operated on a system constructed by one host to a cluster system constituted of plural hosts without modifying these programs. SOLUTION: A host 100 includes a user program 102, a cluster locking means 103, an intra-host memory 104, a cluster unlocking means 105, a disk reading means 106, a disk writing means 107, lock/memory correspondence information 108, and lock/retreat area correspondence information 101 and a host 110 also has similar functions. A host operation monitoring means 120, an inter-host lock management means 130 and an inter-host sharing disk device 140 are prepared as shared functions between plural hosts. Since the contents of the intra-host memory 104 are automatically updated at the time of executing the locking means 103 and the unlocking means 105, user programs sharing the memory can be transferred from plural processes driven in one host to the cluster system constituted of plural hosts and executed without modifying these programs.
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