Compressed storage access system with uncompressed frequent use data

Abstract

Storage system that includes: an address search section for i) storing an address for frequent use data and a data index assigned to the address, ii) acquiring an address of write or read data, and iii) searching stored addresses with the acquired address, a frequent use data storage section for i) storing a tag related to the use data and the index, ii) acquiring the index when an address acquired by the search section has hit a stored address, and iii) identifying frequent use data that corresponds to the tag, a data comparator for i) acquiring the frequent use data from the storage section, ii) comparing the data with write data, and iii) identifying frequent use data that hit the write data, and an compression-expansion section for acquiring and compressing the write data and the frequent use data from the comparator, and for acquiring the read data.