公开(公告)号：JP2001159989A

公开(公告)日：2001-06-12

申请号：JP2000321949

申请日：2000-09-14

Applicant: EMC CORP

Inventor： BACHMAT EITHAN ,  OFEK YUVAL ,  ZAKAI AVINOAM ,  SCHREIBER MOSHE ,  DUBROVSKY VICTORIA ,  LAM TAO KAI ,  MICHEL RUBEN

IPC: G06F12/16 ,  G06F3/06 ,  G06F11/34 ,  G06F12/00 ,  G11B17/22

Abstract: PROBLEM TO BE SOLVED: To provide a method regarding management of a data processing system in general and more particularly regarding management of a disk array storage device. SOLUTION: The balancing of loads of the degree of activity on a physical disk storage device is achieved by monitoring reading and writing to blocks at adjacent storage positions on the physical disk storage device. A list of exchangeable pairs of blocks is developed by size. Statistical values accumulated over a certain time interval are used for obtaining the values of the degree of activity of access to the each block and the each physical disk derive. One pair of blocks are selected by statistical analysis. Exchange is performed after a test to determine an adverse effect generated by the change of blocks and the loads are distributed on individual physical storage devices with one layer in average.

公开(公告)号：JP2001175427A

公开(公告)日：2001-06-29

申请号：JP2000321950

申请日：2000-09-14

Applicant: EMC CORP

Inventor： BACHMAT EITHAN ,  OFEK YUVAL ,  LAM TAO KAI ,  DUBROVSKY VICTORIA ,  MICHEL RUBEN

IPC: G06F3/06 ,  G06F11/34 ,  G11B17/22 ,  G11B20/10

Abstract: PROBLEM TO BE SOLVED: To generally realize a method for the titled method in the management of a data processing system, and especially to attain the method in the management of a disk array storage device. SOLUTION: The load averaging of activity on a physical disk storage device is achieved, by monitoring reading and writing for blocks at adjacent storage positions on the physical disk storage device. The list of a pair of exchangeable blocks is formed based on the size and function. Statistic stored across a certain intervals is used for obtaining an access activation value related with each block and each physical disk drive. The activity is expressed as a disk seek time, a wait time, and a data transfer time. A pair of blocks are selected by statistical analysis. Then, the exchange is conducted after test for certifying adverse effects generated due to the change is operated, and loads are further evenly distributed on each physical disk storage device.