SYSTEM AND METHOD OF VERSIONING CACHE FOR A CLUSTERING TOPOLOGY

摘要

Aspects of the disclosure pertain to a system and method for versioning cache for a clustered topology. In the clustered topology, a first controller mirrors write data from a cache of the first controller to a cache of the second controller. When communication between controllers of the topology is disrupted (e.g., when the second controller goes offline, while the first controller stays online), the first controller increments a cache version number stored in a disk data format of a logical disk, the logical disk being owned by the first controller and associated with the write data. The incremented cache version number provides an indication to the second controller that the data of the cache of the second controller is stale.

主权项

1. A method of operation of a system, the method comprising:
recording a cache version number in a memory of a first controller of the system; recording the cache version number in a memory of a second controller of the system; recording the cache version number in a disk data format of a logical disk of the system; and receiving write data associated with the logical disk in a cache of the first controller, wherein the logical disk is owned by the first controller, the cache version number being associated with the logical disk, the cache version number being a first value.