Input/output de-duplication based on variable-size chunks

摘要

Techniques, systems, and articles of manufacture for input/output de-duplication based on variable-size chunks. A method includes partitioning virtual block data into multiple variable-sized chunks, caching each of the multiple variable-sized chunks in a chunk cache according to content of each of the multiple variable-sized chunks, initializing virtual block-to-chunk mapping and chunk-to-physical block mapping for each of the multiple variable-sized chunks, and detecting duplicate disk input and/or output requests across multiple hosts based on content-based mappings of the input and/or output requests to the chunk cache and the virtual block-to-chunk mapping and chunk-to-physical block mapping for each of the multiple variable-sized chunks in the chunk cache.

主权项

1. A method comprising:
partitioning virtual block data into multiple variable-sized chunks; caching each of the multiple variable-sized chunks in a chunk cache according to content of each of the multiple variable-sized chunks; initializing virtual block-to-chunk mapping and chunk-to-physical block mapping for each of the multiple variable-sized chunks; and detecting duplicate disk input and/or output requests across multiple hosts based on (i) content-based mappings of the input and/or output requests to the chunk cache and (ii) the virtual block-to-chunk mapping and chunk-to-physical block mapping for each of the multiple variable-sized chunks in the chunk cache; wherein at least one of the steps is carried out by a computer device.