Methods and apparatus for cut-through cache management for a mirrored virtual volume of a virtualized storage system

Abstract

Methods and apparatus for cut-through cache memory management in write command processing on a mirrored virtual volume of a virtualized storage system, the virtual volume comprising a plurality of physical storage devices coupled with the storage system.

How it works

Rather than using traditional store-and-forward methods that require multiple cache accesses, this invention implements cut-through cache processing. When the first physical storage device in a mirrored set is ready to receive data, the system simultaneously stores incoming write data in cache memory while transmitting it to that device — eliminating redundant reads and reducing cache memory bandwidth utilization.