Abstract: Disclosed are a virtual computer system and method, wherein computer resources are automatically and optimally allocated to logical partitions according to loads to be accomplished by operating systems in the logical partitions and setting information based on a knowledge of workloads that run on the operating systems. Load measuring modules are installed on the operating systems in order to measure the loads to be accomplished by the operating systems. A manager designates the knowledge concerning the workloads on the operating systems through a user interface. An adaptive control module determines the allocation rations of the computer resources relative to the logical partitions according to the loads and the settings, and issues an allocation varying instruction to a hypervisor so as to thus instruct variation of allocations.

Abstract: A system includes at least a user and a file system connected to the user through a network. An estimated write size of a write operation of the user into the file system is managed as an accumulated value. The timing of judging the limit of the disk usage amount is specified from the accumulated value and a predetermined threshold value, and the limit of the disk usage amount is judged at the specified timing, so that disk usage amount by a user may be limited and managed.

Abstract: Disclosed are a virtual computer system and method, wherein computer resources are automatically and optimally allocated to logical partitions according to loads to be accomplished by operating systems in the logical partitions and setting information based on a knowledge of workloads that run on the operating systems. Load measuring modules are installed on the operating systems in order to measure the loads to be accomplished by the operating systems. A manager designates the knowledge concerning the workloads on the operating systems through a user interface. An adaptive control module determines the allocation rations of the computer resources relative to the logical partitions according to the loads and the settings, and issues an allocation varying instruction to a hypervisor so as to thus instruct variation of allocations.

Abstract: Disclosed are a virtual computer system and method, wherein computer resources are automatically and optimally allocated to logical partitions according to loads to be accomplished by operating systems in the logical partitions and setting information based on a knowledge of workloads that run on the operating systems. Load measuring modules are installed on the operating systems in order to measure the loads to be accomplished by the operating systems. A manager designates the knowledge concerning the workloads on the operating systems through a user interface. An adaptive control module determines the allocation rations of the computer resources relative to the logical partitions according to the loads and the settings, and issues an allocation varying instruction to a hypervisor so as to thus instruct variation of allocations.

Abstract: A virtualizing file system view method for virtualizing one or more network storage devices into a virtualized file system view network storage system wherein destination network storage information of stored files is compactly held regardless of the number of files, and files are separated into one or more file groups and the file groups managed in destination network storage units. Until now, managing network storage unit information in individual files was necessary however the virtualizing file system view method reduces the management information that must be held and efficiently utilizes network storage capacity without holding destination network storage information in individual files. The cost of rewriting information is also lowered during structural changes such as adding or deleting network storage units since storage destination network information can be rewritten in file groups.

Abstract: A system and method for virtualizing a new network storage additionally installed and an existing network storage as a single file system by inheriting a directories tree structure from the existing network storage, wherein a virtualizing system of the new network storage has the function of reading out setup information of the existing network storage according to an expansion request from the administrator, registering the existing network storage as a member of the virtualizing system, copying a directories tree structure of the existing network storage, and swapping setup information of the existing network storage and that of he new network storage with each other.

Abstract: Changes such as addition or removal of a device in a system composed of a number of devices are automatically detected and the physical location of the devices is managed. A management method of this invention includes a step (S502) of detecting the physical location of servers (S1 through S3) connected to a network switch (2) that is to be monitored, steps (S512 and S513) of collecting a globally unique MAC address which is unique to equipment of the servers (S1 through S3) connected to the network switch (2) and is not shared by the equipments, and a step (S517) of creating configuration information from the MAC address and from the physical connection location of the network switch (2).

Abstract: A system includes at least a user and a file system connected to the user through a network. An estimated write size of a write operation of the user into the file system is managed as an accumulated value. The timing of judging the limit of the disk usage amount is specified from the accumulated value and a predetermined threshold value, and the limit of the disk usage amount is judged at the specified timing, so that disk usage amount by a user may be limited and managed.

Abstract: Disclosed are a virtual computer system and method, wherein computer resources are automatically and optimally allocated to logical partitions according to loads to be accomplished by operating systems in the logical partitions and setting information based on a knowledge of workloads that run on the operating systems. Load measuring modules are installed on the operating systems in order to measure the loads to be accomplished by the operating systems. A manager designates the knowledge concerning the workloads on the operating systems through a user interface. An adaptive control module determines the allocation rations of the computer resources relative to the logical partitions according to the loads and the settings, and issues an allocation varying instruction to a hypervisor so as to thus instruct variation of allocations.

Abstract: A system includes at least a user and a file system connected to the user through a network. An estimated write size of a write operation of the user into the file system is managed as an accumulated value. The timing of judging the limit of the disk usage amount is specified from the accumulated value and a predetermined threshold value, and the limit of the disk usage amount is judged at the specified timing, so that disk usage amount by a user may be limited and managed.

Abstract: Disclosed are a virtual computer system and method, wherein computer resources are automatically and optimally allocated to logical partitions according to loads to be accomplished by operating systems in the logical partitions and setting information based on a knowledge of workloads that run on the operating systems. Load measuring modules are installed on the operating systems in order to measure the loads to be accomplished by the operating systems. A manager designates the knowledge concerning the workloads on the operating systems through a user interface. An adaptive control module determines the alalocation ratios of the computer resources relative to the logical partitions according to the loads and the settings, and issues an allocation varying instruction to a hypervisor so as to thus instruct variation of allocations.

Abstract: A computer resource marketing system using LPAR (logical partitioning) technology that divides a computer resource into a plurality of logical partitions, including a lending server with a logical partition control unit 3 that designates at least one logical partition as a lendable partition, a client system that can borrow a logical partition in the lending server and submit processing to the logical partition, a resource database that stores lending conditions and certification information of logical partitions in the lending server, and a management server that searches the resource database based on a borrowing request from a client system, notifies the client system of a logical partition that meets the requirements of the borrowing request, and authorizes the client system to use the logical partition.

Abstract: In order to execute a flow control and a congestion control in a hop-by-hop manner in a data communication among computers connected to different networks, in a data communication between a client A1 and a remote server B, a communication proxy of the remote server B is located in a local server A in an LAN to which the client A belongs. A communication packet to be routed to the remote server B is stolen (received) and passed to a transport layer. A TCP communication between the client A1 and the remote server B is divided into two; a communication between the client A1 and the communication proxy of the remote server B and a communication between the communication proxy of the remote server B and the remote server B.

Abstract: Disclosed here is a simulator for simulating the propriety of each created policy less-expensively and fast in an autonomic management system controlled by a policy. The simulator that analyzes the behavior of the above described autonomic management system that receives information inputs of system configuration, load balance setting, system load conditions, software performance, software's transitional performance, and target autonomic management policy to calculate the system behavior (resource utilization rate, software response time, and system throughput) by giving consideration to the system's transitional behavior at a time, then apply an autonomic management policy to the behavior, determine the system configuration and load balance setting at the next time, and use the new system configuration and load balance setting for the next time simulation.

Abstract: Changes such as addition or removal of a device in a system composed of a number of devices are automatically detected and the physical location of the devices is managed. A management method of this invention includes a step (S502) of detecting the physical location of servers (S1 through S3) connected to a network switch (2) that is to be monitored, steps (S512 and S513) of collecting a globally unique MAC address which is unique to equipment of the servers (S1 through S3) connected to the network switch (2) and is not shared by the equipments, and a step (S517) of creating configuration information from the MAC address and from the physical connection location of the network switch (2).

Abstract: A system having at least a user and a file system connected to the user through a network is disclosed, in which an estimated write size of the user into the file system is managed as an accumulated value, the timing of judging the limit of the disk usage amount is specified from the accumulated value and a predetermined threshold value, and the limit of the disk usage amount is judged at the specified timing.

Abstract: A load distribution method is adopted by a client-server system comprising a plurality of clients 100 and a server cluster 1100, which includes a plurality of servers 800 each used for processing requests made by the clients 100 and allows the number of the servers 800 to be changed dynamically. Each of the clients 100 detects the number of servers 800 composing the server cluster 1100, sets an allocation of requests transmissible out to a newly added server 900 at a value small in comparison with that set for each of the other servers 800 right after detecting an increase in server count and then transmits out requests to the servers on the basis of the set allocation. It is thus possible to provide the clients 100 and the server-cluster system 1100 with the load distribution method suitable for a cluster reconfiguration technology for changing the number of servers composing the server-cluster system 1100 in accordance with an increase and a decrease in demand for a service.

Abstract: A cache coherence control system for a multi CPU system having a plurality of CPU nodes, memory nodes and I/O nodes interconnected by a network. Each CPU node control circuit has an access right memory for managing an access right of the node in the unit of an extended node larger than a block size of the internal cache of a CPU. When a memory access is performed, the access right memory is referred to, and if the node has an access right to the extended block including a target block, the block is accessed without cache coherence control at other nodes.

Abstract: A system and method for virtualizing a new network storage additionally installed and an existing network storage as a single file system by inheriting a directories tree structure from the existing network storage, wherein a virtualizing system of the new network storage has the function of reading out setup information of the existing network storage according to an expansion request from the administrator, registering the existing network storage as a member of the virtualizing system, copying a directories tree structure of the existing network storage, and swapping setup information of the existing network storage and that of he new network storage with each other.

Abstract: A virtualizing file system view method for virtualizing one or more network storage devices into a virtualized file system view network storage system wherein destination network storage information of stored files is compactly held regardless of the number of files, and files are separated into one or more file groups and the file groups managed in destination network storage units. Until now, managing network storage unit information in individual files was necessary however the virtualizing file system view method reduces the management information that must be held and efficiently utilizes network storage capacity without holding destination network storage information in individual files. The cost of rewriting information is also lowered during structural changes such as adding or deleting network storage units since storage destination network information can be rewritten in file groups.