Hitachi, Ltd.

Shigeo Takasaki

Toshiaki Arai

Tomoki Sekiguchi

Takashige Kubo

Masaichiro Yoshioka

Yoshio Ukai

Nobutaka Hagiwara

Jinichi Imura

Yasuo Kubo

A file prefetch control method including the steps of dividing a file into a plurality of partial files furnished with a partial file name each, and converting a request to access any one of the partial files using the corresponding partial file name into a request to access the entire file to which the requested partial file belongs, whereby the file as a whole is read out. When multiple files are prefetched in this manner, the throughput of a file system is enhanced, the number of access operations to a secondary memory is reduced, and the wait time for access to partial files is shortened.

File prefetch control method for computer system

A file control system for virtual machines capable of executing simultaneously a plurality of operating systems in a single computer system under control of a virtual machine monitor for controlling the operating systems, wherein interface means for file input/output operation are provided between the virtual machine monitor and the operating systems for allowing the virtual machine monitor to manage a plurality of files owned by the virtual machines.

Virtual machine file control system which translates block numbers into

Growing community of inventors

Sagamihara, Japan

Shigeo Takasaki