WORKLOAD SELECTION AND CACHE CAPACITY PLANNING FOR A VIRTUAL STORAGE AREA NETWORK

摘要

Exemplary methods, apparatuses, and systems receive a first input/output (I/O) trace including storage addresses that were subject to a plurality of I/O requests from a first workload during a first period of time. The first I/O trace is run through a cache simulation using a plurality of simulated cache sizes. A first state of the cache simulation is stored upon completing the first I/O trace simulation. The first I/O trace is deleted in response to storing the first state. A second I/O trace including storage addresses that were subject to a plurality of I/O requests from the first workload during a second period of time is received. A cumulative miss ratio curve for the first workload is generated by loading the stored first state as a starting point for simulating the second I/O trace and running the second I/O trace through the cache simulation.

主权项

1. A computer-implemented method, comprising:
receiving a first input/output (I/O) trace including storage addresses that were subject to a plurality of I/O requests from a first workload during a first period of time; running the first I/O trace through a cache simulation using a plurality of simulated cache sizes; storing a first state of the cache simulation upon completing a simulation of the first I/O trace; deleting the first I/O trace in response to storing the first state of the cache simulation; receiving a second I/O trace including storage addresses that were subject to a plurality of I/O requests from the first workload during a second period of time; and generating a cumulative miss ratio curve (MRC) for the first workload by loading the stored first state as a starting point for simulating the second I/O trace and running the second I/O trace through the cache simulation from the starting point.