Emc IP Holding Company LLC

Inga Petryaevskaya

Vitaly Stanislavovitch Kozlovsky

Alexey Fomin

Yuri Zagrebin

Alexander Shadrin

Denis Serov

Aleksandr Valentinovich Shadrin

Konstantin Tyapochkin

Automated Tiered Storage (ATS) has become widely accepted technique in IT industry. Since IO data has different data densities on storage systems, higher storage capacity and improved performance can be achieved by combining two or more storage device tiers having different performance and cost characteristics. These multiple different storage device tiers can be combined into one automated storage pool, which automatically chooses optimal data placement for achieving both the highest performance and the lowest cost. When the storage device tier information can be stored as metadata for each of the data chunks. When there is a system failure and data needs to recovered, the device tier information metadata can be used to restore data to the predetermined optimum storage device tier of the ATS system which shortens the post-recovery warm-up time.

Dynamic rule based model for long term retention

Methods and apparatus are provided for block similarity based block level deduplication of data. An exemplary method comprises obtaining a deduplicated dataset comprising a plurality of unique data chunks; determining a number of differences between two of the unique data chunks; evaluating whether the number of differences satisfies a predefined similarity criteria (e.g., that the number of bit differences cannot exceed a specified limit); and storing metadata for a first one of the two unique data chunks if the predefined similarity criteria is satisfied for the two unique data chunks, wherein the metadata comprises a pointer to a second one of the two unique data chunks and bit differences between the two unique data chunks. The bit differences comprise an executable code and/or a bit mask. The predefined similarity threshold is optionally a tunable parameter. The first one of the two unique data chunks can be restored by processing the metadata.

Block level deduplication with block similarity

Example embodiments of the present invention relate to a method, an apparatus, and a computer program product for IT appliance control. The method comprises determining an action regarding a storage system, encoding the action regarding the storage system, and representing the action regarding the storage system as a graphical representation.

Method and apparatus for IT appliance control

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St. Petersburg, Russia

Inga Petryaevskaya