Patent attributes
A method of responding to requests to read data from a computerized data storage system is disclosed. The method includes (a) receiving a request to access a set of data stored in an extent of persistent storage of the computerized data storage system, (b) obtaining, from mapping metadata provided for locating the requested extent, a hash digest of the set of data, the hash digest identifying contents of the set of data, (c) indexing into a content-based cache within memory of the computerized data storage system with a key based on the hash digest to locate a cached copy of the set of data within the memory, and (d) returning the cached copy of the set of data from the memory without accessing the extent of data from persistent storage. An apparatus, system, and computer program product for performing a similar method are also provided.
