Methods and systems for distributed cache tag management

Methods and systems are disclosed that relate to locating cached data corresponding to data in persistent memory within a data storage facility. An exemplary method includes receiving a request for data in persistent memory, applying a function to a persistent memory address of the requested data to determine an address of one of a plurality of cache tag controllers, each of which controls nonduplicative cache tags, and looking up, at the addressed cache tag controller, a cache memory address for data corresponding to the requested data.