Hitachi, Ltd.

Hitachi Vantara Corporation

Hiroyuki Mitome

Naoki Inoue

Yuji Tsushima

Yasuo Hirata

Christopher J Aston

Yukari Hatta

Shuhei Matsumoto

Isao Watanabe

Norimitsu Hayakawa

Makiko Shinohara

Ryosuke Matsubara

Katsuyuki Itoh

Graham Ellement

Simon Carl Johnson

Sathisha Poojary

Akiko Mori

A storage control system to provide file-level storage and block-level storage services. The storage control system has a computer system including a second I/O unit configured to receive block-level storage related requests, a processor unit, a first memory unit, and a storage unit; and a programmable logic device including a first I/O unit configured to receive file-level storage related requests, an interface unit configured to communicate with the computer system, one or more programmable hardware-implemented processing units and for processing of file-level storage related requests, and a second memory unit. The software components executed on the processor unit include a block-level storage management component and a virtualization management component; and a virtual machine managed by the virtualization management component executes a file-level management component to communicate with the programmable hardware-implemented processing units of the programmable logic device and to manage file-level storage services related to file-level storage related requests.

Storage control system managing file-level and block-level storage services, and methods for controlling such storage control system

A plurality of machine systems constituted by different VLAN constitution methods are integrated on one machine system by using virtual machines. An operation can be switched for virtual network interface cards to VLAN communication corresponding to VLAN ID set to a virtual network interface card or to VLAN communication corresponding to VLAN ID set by OS on a virtual machine using the virtual network interface card depending on whether or not VLAN ID is set.

Virtual machine system and method of network communication between virtual machines

A virtual machine control method and a virtual machine system are disclosed. In the case where a guest program can be operated in a plurality of address translation modes and the same guest virtual address is translated into different host real addresses in each address translation mode, the illegal access to a host real address by illegal address translation by double registration in the same page table is avoided, and the address translation mechanism is efficiently operated. A plurality of host page tables are prepared in the main storage, and one of the host page tables is selected with the change in address translation mode of the guest program. The bottom address of the selected host page table is set in the host page table register thereby to switch the host page table.

Virtual machine control method and virtual machine system having host page table address register

A method for determining a wiring pattern of a signal line for connection of a circuit on a multi-layer printed wiring board includes the steps of providing a constraint of an electrical length which the signal line must satisfy, determining an electrical length change at a discontinuous delay part of the signal line along which a signal propagates, determining a wiring route of the signal line, calculating an electrical length of the signal line with use of a wiring length of the signal line and the determined electrical length change, judging whether or not the calculated electrical length satisfies the electrical length constraint given to the signal line, and determining the wiring route as a wiring pattern when the electrical length constraint is satisfied as the decision result, thereby carrying out a wiring layout to make an electrical length constraint satisfied.

Wiring pattern decision method considering electrical length and multi-layer wiring board

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Hadano, Japan

Hiroyuki Mitome