Patent ID: 9069616
Filing Date: 2015-06-30
Classification: G06F

Abstract:
1. A computer-implemented method, the method comprising: receiving a first disk access request for disk input/output (I/O) access on a virtual disk of a virtual machine, the virtual disk emulating a local physical disk for the virtual machine, wherein the virtual disk includes logical data blocks that map to physical data blocks distributed among multiple physical storage devices, the access by the virtual disk to the multiple physical storage devices being in parallel; deriving a simulated latency cost for the requested disk I/O access according to one or more latency and throughput characteristics of the local physical disk emulated by the virtual disk, the simulated latency cost including a simulated data transfer latency for carrying out the requested disk I/O access on the local physical disk emulated by the virtual disk and a simulated random access latency for carrying out the requested disk I/O access on the local physical disk emulated by the virtual disk; and