PERFORMANCE OF DE-CLUSTERED DISK ARRAY

摘要

Embodiments of the present invention relate to a method and apparatus for improving performance of a de-clustered disk array by making statistics on a number and types of active input/output (I/O) requests of each of the plurality of physical disks; dividing the plurality of physical disks at least into a first schedule group and a second schedule group based on the statistic number and types of the active I/O requests of the each physical disk for a predetermined time period, the first schedule group having a first schedule priority, the second schedule group having a second schedule priority higher than the first schedule priority; and selecting, in a decreasing order of the schedule priority, a physical disk for schedule from one of the resulting schedule groups thereby preventing too many I/O requests from concentrating on some physical disks and thereby improve overall performance of a de-clustered RAID.

主权项

1. A method for improving performance of a de-clustered disk array, the de-clustered disk array comprising a plurality of physical disks, the method comprising:
generating statistics on a number and types of active input/output (I/O) requests of each of the plurality of physical disks; dividing the plurality of physical disks at least into a first schedule group and a second schedule group based on the generated statistics on the number and the types of the active I/O requests of each of the physical disk for a predetermined time period, the first schedule group having a first schedule priority, the second schedule group having a second schedule priority, wherein the second schedule priority is higher than the first schedule priority; and selecting, in a decreasing order of the schedule priority, a first physical disk to schedule from one of the resulting schedule groups.