摘要:
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.
摘要:
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.
摘要:
In order to provide an interface of acquiring physical position information of an I/O device on a virtual machine monitor having an exclusive allocation function of the I/O device and optimize allocation of a resource to a virtual server by using the acquired physical position information, a virtual machine monitor includes an interface of allocating a resource in accordance with a given policy (a parameter of determining to which a priority is given in distributing resources) for an I/O device, a CPU NO., and a memory amount request to guest OS. Further, the virtual machine monitor includes an interface of pertinently converting physical position information of the resource allocated by the virtual machine monitor to notice to guest OS.
摘要:
A resource management module of a management server for controlling a multi-root I/O manager connected to a PCI switch for connecting a plurality of I/O devices and a plurality of computers with each other includes: failure handling content information indicating, for each computer sharing a multi-root I/O device, a content of a failure handling at an occurrence of a failure in the multi-root I/O device; and failure handling availability status information indicating whether a hardware reset of the multi-root I/O device is possible and updates, upon reception of a notification of the occurrence of the failure in the multi-root I/O device, the failure handling availability status information, and instructs, based on the failure handling availability status information, the multi-root I/O manager to restrain or cancel the hardware reset of the multi-root I/O device.
摘要:
A computer system including: a file server, cache servers, and a cache management server, wherein: the cache server obtains the authority information from the cache management server, in a case of receiving a command to process a file, wherein the cache server refers to the obtained authority information, wherein the cache server executes the command to process the file, in a case where the cache server has an administration right of the cache data of the file, wherein the cache management server sends to the cache server an update command for transferring the administration right of the cache data to the other cache server, wherein the cache server sends the update command to the other cache server after receiving the update command, and executes a update procedure in which a lock management information is updated.
摘要:
Provided is a failover method for a cluster system for realizing smooth failover of the guest OS's, even when there are many guest OS's, while reducing consumption of computer resources of a server. Smooth failover is realized by preventing competition during failover even when the number of guest OS's is increased. In a cluster configuration in which a slave/master cluster program is operated in a guest OS/host OS, the master cluster program (510) collects and transmits heartbeats of the slave cluster program, thereby realizing failure monitoring through the certain amount of heartbeats without depending on the number of guest OS's. Further, when the master cluster program monitors failures of the slave cluster program of its own computer to find a normal operation of the guest OS, the amount of communication through heartbeats is reduced by eliminating the necessity of communication to a standby system slave cluster program.
摘要:
Even when a large number of guest OSs exist, a failover method meeting high availability needed by the guest OSs is provided for the each guest OS. In the event of a physical or logical change of a system, or change of operation states, a smooth failover method can be realized by preventing the consumption of resource amounts due to excessive failover methods, and the occurrence of systemdown due to an inadequate failover method. In a server virtualization environment, in a cluster configuration having a failover method due to hot standby and cold standby, by selecting a failover method meeting high availability requirements specifying performance during failover of applications on the guest OSs, a suitable cluster configuration is realized. Failure monitoring is realized by quantitative heartbeat.
摘要:
A method is provided which eliminates redundancy from the shadow PT operation performed by the virtual machine monitor (VMM) when the guest operating system running on a virtual machine updates a guest page table (PT) address. The VMM associates a plurality of shadow PTs with guest PTs and allocates their relation in memory. When it detects the update of a guest PT address, the VMM searches for a shadow PT corresponding to the updated guest PT. If the associated shadow PT exists, the VMM omits rewriting the shadow PT and registers the address of the shadow PT with the central processing unit (CPU). If the associated shadow PT does not exist, the VMM allocates a memory, creates a shadow PT, registers an address of the created shadow PT with the CPU, and records a relationship between the updated guest PT and the generated shadow PT.
摘要:
Provided is a failover method for a cluster system for realizing smooth failover of the guest OS's, even when there are many guest OS's, while reducing consumption of computer resources of a server. Smooth failover is realized by preventing competition during failover even when the number of guest OS's is increased. In a cluster configuration in which a slave/master cluster program is operated in a guest OS/host OS, the master cluster program (510) collects and transmits heartbeats of the slave cluster program, thereby realizing failure monitoring through the certain amount of heartbeats without depending on the number of guest OS's. Further, when the master cluster program monitors failures of the slave cluster program of its own computer to find a normal operation of the guest OS, the amount of communication through heartbeats is reduced by eliminating the necessity of communication to a standby system slave cluster program.
摘要:
Provided is a technology for increasing reliability of communication carried out by OSes and application programs operating on logical partitions set on a computer. The computer has multiple logical partitions constructed therein by a control program, the physical interfaces are shared by virtual interfaces respectively set for the multiple logical partitions, and the memory module stores management information indicating correspondences between the physical interface and the virtual interface. The control method comprising the steps of: obtaining, by the control module, communication data transferred to the external device and received by the virtual interface; obtaining, by the control module, correspondences between the physical interface and the virtual interface, selecting, by the control module, the physical interface used for the communication with the external device based on the correspondences between the physical interface and the virtual interface; and changing, by the control module, the correspondence between the physical interface and the virtual interface if a failure occurs in the communication path.