Hitachi, Ltd.

Hitachi Vantara Corporation

Hiroka Ihara

Nobuhiro Yokoi

Akira Deguchi

Takashi Nagao

Yoshihiro Yoshii

A storage system includes: a central processing unit; a main memory; first management information that associates a hash value of received data with an address in a volume; and an I/O processing package. The I/O processing package includes an I/O processor and an I/O memory. The I/O processor executes protocol processing. The I/O processor executes at least a part of search processing of an address associated with a hash value of first received data in the first management information. The central processing unit controls execution of deduplication processing of the first received data based on data of an address associated with the hash value of the first received data.

Enhanced data management in distributed storage systems using dynamic load-based allocation of search and deduplication processes

A primary storage system reads a plurality of journal data, and performs collective compression that is compression of data that is at least a part of the plurality of pieces of journal data in the plurality of journals and is larger than a size of one journal data. The collectively compressed data, which is a plurality of pieces of journal data subjected to collective compression, is a transfer target from the primary storage system to the secondary storage system. The journal is journal data and metadata including a write order of the journal data and associated with the journal data. The journal data is a copy of data written in the primary volume. The secondary storage system acquires a plurality of pieces of journal data by decompressing one or more pieces of collectively compressed data, and writes the plurality of pieces of journal data to the secondary volume.

Remote copy system and remote copy method

A network interface includes a processor, memory, and a cache between the processor and the memory. The processor secures a plurality of buffers for storing transfer data in the memory, and manages an allocation order of available buffers of the plurality of buffers. The processor returns a buffer released after data transfer to a position before a predetermined position of the allocation order.

Network interface and buffer control method thereof

A network interface for a storage controller includes a processor and a memory that stores an instruction code to be executed by the processor. The processor executes protocol processing for transmitting and receiving packets via a network. The processor reproduces a first packet not received from the network, from a plurality of other received packets included in an error correction packet group same as that of the first packet.

Network interface for storage controller

Remote copy of compressed journal data and corresponding metadata

An information processing system includes a first storage system for supplying a primary site, and a second storage system for supplying a secondary site. The first storage system is allowed to execute replication by transferring a processing history of a data volume of the first storage system to the second storage system, and to transfer multiple processing histories collectively. The first storage system integrates histories of multiple write accesses included in the multiple processing histories to be collectively transferred, which are duplicatedly addressed on the volume for transfer.

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Tokyo, Japan

Hiroka Ihara