Storage system and data management method

摘要

A storage system is provided with a plurality of physical storage devices, a cache memory, a control device that is coupled to the plurality of physical storage devices and the cache memory, and a buffer part. The buffer part is a storage region that is formed by using at least a part of a storage region of the plurality of physical storage devices and that is configured to temporarily store at least one target data element that is to be transmitted to a predetermined target. The control device stores a target data element into a cache region that has been allocated to a buffer region (that is a part of the cache memory and that is a storage region of a write destination of the target data element for the buffer part). The control device transmits the target data element from the cache memory. In the case in which a new target data element is generated, the control device executes a control in such a manner that the new target data element has a high tendency to be stored for a buffer region in which the transmitted target data element has been stored and to which a cache region has been allocated.

主权项

1. A storage system comprising:
a plurality of physical storage devices; a cache memory; a control device that is coupled to the plurality of physical storage devices and the cache memory; and a buffer that is at least a part of a storage region of the plurality of physical storage devices, wherein the control device is configured to, in a case in which there is a new target data element which will be stored in the buffer:
(x1) determine whether or not the buffer has a buffer region whose state means transmitted,(x2) if the determination result of (x1) is false, change the state of the buffer region from unused, which means data has not yet been stored, to used, which means that data has been stored but has not yet been transmitted, allocate a cache region of the cache memory to the buffer region and store the new target element data in the allocated cache region, and(x3) if the determination result of (x1) is true, change the state of the buffer region from transmitted to used, and store the new target element data in a cache region which has been already allocated to the buffer region, and, the control device is configured to transmit a target data element from the cache region which is allocated to the buffer region whose state means used, to a predetermined target, and change the state of the buffer region from used to transmitted.