Information processing system

摘要

Deduplication is executed in a storage device having low random access performance, such as an optical disk library. When an optical disk that is not inserted into an optical disk drive needs to be accessed in order to execute binary compare, data to be binary compared is stored in a temporary memory area in order to postpone the binary compare, and on the timing when the optical disk is inserted, the postponed binary compare is executed. Before second deduplication, which is deduplication between data to be stored in the storage device and the data in the optical disk library, is executed, first deduplication, which is deduplication between the data to be stored in the storage device and the data in the temporary memory area, is executed.

主权项

1. An archive system comprising:
a deduplication server that receives input data; and a library device having a plurality of removable recording mediums, wherein: the deduplication server includes: a first memory area, a unique data generator that generates a unique value to each of a plurality of chunks generated by dividing the received input data, and a first management unit that manages unique data corresponding to data recorded on the plurality of removable recording mediums in the library device in a form of a table, and the library device includes: an accommodating unit that accommodates the plurality of removable recording mediums, a drive that is configured to perform at least one of recording data onto at least one of the plurality of removable recording mediums or reproduce the data recorded on the at least one of the plurality of removable recording mediums, and a carrying unit that carries the at least one of the plurality of removable recording mediums to the drive from the accommodating unit, for each chunk of the plurality of chunks, the deduplication server is configured to: determine a match by comparing the generated unique value of the chunk to unique data corresponding to at least a portion of the data recorded on the at least one of the plurality of removable recording medium, store the chunk in a second memory area of the deduplication server if a match is determined, otherwise, the chunk is stored in the first memory area, determine a match by binary comparing the chunk stored in the second memory area with the portion of the data recorded on the at least one of the plurality of removable recording medium, and discard the chunk stored in the second memory area if a match is determined.