Computer realizing high-speed access and data protection of storage device, computer system, and I/O request processing method

摘要

In a computer, a logical partition for calculation in which an OS and an application operate and a logical partition for storage for providing a storage function are constructed. In the logical partition for calculation, a device corresponding to a storage device is provided, while the logical partition for storage provides a volume. A memory space that can be shared by the both logical partitions is prepared, and management information describing a sorting destination or a sorting method of an I/O request issued by an application is provided in the memory. If the logical partition for calculation receives an I/O request from the application, the partition refers to the management information and sorts the I/O request to the storage device or the logical partition for storage. The logical partition for storage processes the received I/O request by the storage function and transmits the result to the storage device.

主权项

1. A computer system comprising:
a CPU and storage devices providing RAID (Redundant Array of Inexpensive Disks) areas, in which data is stored with RAID configuration and Raw areas, which are accessed directly and in which data is stored without RAID configurations, wherein the CPU is configured to: provide at least a first logical partition and a second logical partition by partitioning physical resources including the CPU and the storage devices, wherein CPU resources allocated to the first logical partition are configured to: provide one or more first virtual devices to an application, receive a first I/O (input/output) request from the application and access the Raw area based on the first I/O request, receive a second I/O request form the application and transmit a request to the second logical partition based on the second I/O request, wherein the CPU resources allocated to the second logical partition are configured to: control access to the RAID area with RAID control function; control access to the Raw area without RAID control function; and provide a plurality of volumes providing RAID areas, wherein each of the virtual devices correlate to at least one of the volumes, wherein at least one path which is coupled to either the RAID areas or the Raw areas are set to each of the virtual devices, wherein, when data stored in a first volume is migrated to the Raw areas, the CPU allocated to the second logical partition is configured to: create a second volume as a mirror volume of the first volume; create a third volume coupled to the Raw area as an external storage; and synchronize the second volume with the third volume, and the CPU allocated to the first logical partition is configured to: create a second virtual device, wherein a first path of the second virtual device is set to the second volume and a second path of the second virtual device is set to the Raw area; and change a mapping of the first path of the second virtual device to the third volume after the synchronization of the second volume with the third volume.