Abstract: A computer-executable method, system, and computer program product for managing a data storage system using a distributed write-through cache, wherein the data storage system comprises a first node, a second node, and a data storage array, wherein the first node includes a first cache and the second node includes a second cache, the computer-executable method, system, and computer program product comprising providing cache coherency on the data storage system by synchronizing the second cache with the first cache based on I/O requests received at the first node.

Abstract: Example embodiments of the present invention relate to a method, a system, and a computer program product for re-syncing a distributed cache after node disconnection. The method includes stopping cache coherency among a plurality of nodes at times a first node among the plurality of nodes is in a disconnected state and determining the first node is no longer in the disconnected state. A second cache at a second node then may dump portions of the second cache at the second node inconsistent with changes made to a first cache at the first node at times the first node was in the disconnected state.