Cache Management Device Parallel Flushing Storage Blocks

The patent merges multiple cache page flush operations into a single unified operation. When multiple cache pages map to the same storage block, the system combines these flush operations and writes all data simultaneously in one I/O operation, rather than performing sequential writes. This merging approach maintains data reliability while significantly improving cache flushing efficiency by reducing the number of I/O operations and eliminating redundant storage block locking.

The patent changes the parameter of cache page granularity by introducing the concept of cache line as the fundamental unit of data access. Instead of working with fixed-size cache pages that may not align with storage block sizes, the system uses cache lines (smaller granular units) and dynamically groups them based on their mapping relationships with storage blocks. This parameter change allows fine-grained data access while simplifying the flushing mechanism by using size-adaptive page merging.

The patent applies preliminary action by pre-establishing a mapping relationship between cache pages and storage blocks before the flushing operation begins. The system uses a page-to-block mapping table that is maintained and updated during normal cache operations. When flushing is needed, the system queries this pre-established mapping to identify which cache pages map to the same storage block, enabling immediate parallel flush operations without complex runtime analysis. This preliminary preparation reduces both management complexity and response time.