Patent ID: 8244976
Filing Date: 2012-08-14
Classification: G06F

Abstract:
1. An apparatus external to a storage area network (SAN) and coupled to the SAN, the apparatus comprising: at least one processor; a memory coupled to the at least one processor; and a performance monitor residing in the memory and executed by the at least one processor, the performance monitor determining ranges corresponding to SAN logical and SAN physical accesses in the SAN, each SAN logical access comprising an access to data in memory in the SAN and each SAN physical access comprising an access to data in a disk drive in the SAN, the performance monitor defining windows of access times corresponding to the SAN logical and SAN physical accesses from the ranges, wherein a size of the window of SAN logical access times is greater than a size of the SAN logical range and a size of the window of SAN physical access times is greater than a size of the SAN physical range, wherein the window of SAN logical access times and the window of SAN physical access times are mutually exclusive, and reporting SAN logical and SAN physical accesses by the apparatus based on whether an access time to the SAN by the apparatus falls within the defined windows, wherein the performance monitor determines the ranges corresponding to SAN logical and SAN physical accesses by monitoring a plurality of service times corresponding to accesses to the SAN, and wherein each of the plurality of service times corresponding to the accesses to the SAN is received as a numerical value from the SAN.