Hitachi, Ltd.

Takayuki Fukatani

Hitoshi Kamei

Yoshiaki Eguchi

Yasutomo Yamamoto

Tomohiro Kawaguchi

Masanori Takada

Masaaki Iwasaki

Keiichi Matsuzawa

Tomonori Esaka

Takahiro Nakano

Nobuyuki Saika

Mitsuo Hayasaka

Takaki Nakamura

Yohsuke Ishii

Akiyoshi Hashimoto

Masanori Takata

Akira Hayakawa

Shigeyuki Kabano

Yugo Yamauchi

It aims to make it possible to readily and rapidly scale up the server which executes one application. In a computer system which includes one or more compute server(s) which each has an application container which executes the one application and a management server which manages the compute server(s), the management server is configured to, in a case of increasing the number of the compute servers which each has the execution unit which executes the one application, specify a logic unit that a data unit that the execution unit of an existing compute server utilizes upon execution of an application is stored, and in a case where the execution unit of a newly added computer server executes the application, set the newly added compute server so as to refer to the specified logic unit.

Computer system and scale-up management method

In a multi-storage node system including a plurality of storage nodes, a plurality of storage nodes include a plurality of drives that store data and a control unit that controls writing of data to the drives. The control unit divides storage areas of the plurality of drives into a plurality of physical chunks, allocates the divided physical chunks to logical chunks, and stores data. A plurality of storage nodes are divided into fault sets affected by a single failure and manage the multi-storage node system. The control unit of one primary node that manages the multi-storage node system among a plurality of storage nodes includes a database for managing allocation of the physical chunks of a plurality of storage nodes to the logical chunks for each drive, each storage node, or for each fault set.

Multi-storage node system and capacity management method of multi-storage node system

In the present invention, in order to provide an effective synchronization process control method between sites in a multi-site file system sharing through a data center, a synchronization process target file group is split into sub trees of an appropriate size, in accordance with a conflict frequency of an update file between sites, and a throughput between site-data center. Then, the split sub tree is synchronized from the one having high conflict frequency.

Information processing system and data synchronization control scheme thereof

A file server is coupled to a plurality of user terminals and a remote file server. The file server, stores, in a storage device, data of files received from the plurality of user terminals, replicates the files to the remote file server, stubs the files stored in storage, and, upon receiving an access request from the user terminal, reads out data of the file from storage and transmits the data to the user terminal if a file related to the access request is not stubbed. If a file related to the access request is stubbed, the file server recalls data of the file from the remote file server and transmits data of the file to the user terminal. The file server replicates, to the remote file server, data of a user who performs a session disconnection request to the file server within a certain time in preference to another user.

File server, information system, and control method thereof

It is provided a computer system, comprising a server and first and second storage systems. The first storage system stores deduplicated data sharing at least a part of data with other data, shared data shared by a plurality of pieces of the deduplicated data, and first type data representing a type of the stored data including the deduplicated data and the shared data. The deduplicated data is associated with the shared data by a pointer to the shared data, and includes differential data indicating a difference from the shared data. The server creates second type data representing a type of the data stored in the second storage system from the first type data. The second storage system stores the shared data associated with the deduplicate data at a reading position before a position at which the deduplicated data is read in sequential reading and stores the second type data.

Computer system for backing up data

A file storage performs control to create a virtual parent file having an identifier capable of uniquely identifying a parent file among storage systems and volumes, and to acquire block layout information of the parent file using said identifier. The file storage creates a virtual parent file in the volume in which the clone file is created, and sets the file as a virtual parent file of the clone file so as to enable creation of a clone file of a parent file that exists in a different volume or a different storage system. Moreover, by combining creating the virtual parent file and switching the identifier of the parent file which is pointed by the virtual parent file, migration of clone files and parent files astride storage systems and volumes is enabled.

File storage system and file cloning method

An aspect of this invention is a computer system, including: a storage apparatus for allocating real storage areas of a plurality of tiers of a tiered real storage area pool to a volume, and migrating and relocating data within the volume between the plurality of tiers; and a host apparatus that accesses the volume provided by the storage apparatus. The host apparatus is configured to refer to tier information including information on a corresponding one of the plurality of tiers to which an access destination address within the volume belongs to identify the corresponding one of the plurality of tiers to which the access destination address belongs and refer to settings predetermined for the plurality of tiers to perform I/O control for the access destination address based on settings of the identified corresponding one of the plurality of tiers.

Computer system and method of controlling I/O with respect to storage apparatus

For at least one of storage unit, processor and cache memory which are I/O process-participating devices related to I/O command process, when a load of one or more I/O process-participating devices or a part thereof is a low load equal to or less than a predetermined threshold value, a processing related to a state of one or more of the I/O process-participating devices or a part thereof is redirected to another one or more I/O process-participating devices or a part thereof, and the state of the one or more I/O process-participating devices or a part thereof is shifted to a power-saving state.

Storage system comprising function for reducing power consumption

A file management sub-system executes file migration without causing an unintended drop in the response time or the like. When a management computer issues a file migration direction, a file storage apparatus notifies client computer associated with a migration target file that file migration is scheduled. When postponement or suspension of file migration is requested by the client computer, the file migration is postponed or suspended.

File management sub-system and file migration control method in hierarchical file system

Appropriate control is performed for data blocks and data block groups in a file. A file system having various functions provides an upper program with an interface for changing size, storage position and processing method in each function of extents being data block management units in a file. The file system can improve the effects aimed by the respective functions by implementing the extent configuration and processing optimized for the various functions of the file system, based on the instruction from the upper program.

Information apparatus and method of controlling the same

Provided is a file server providing a file service to a host computer, including an interface coupled to the host computer; a processor; a memory; and an interface coupled to a disk drive. The file server is configured to calculate a capacity of storage areas in the memory, which is required to provide the file service; execute a first memory check in which the storage areas having the calculated capacity are tested; execute, after the first memory check is completed, a second memory check in which remaining storage areas in the memory are tested; and start, in a period after the first memory check is completed and before the second memory check is completed, providing the file service.

Growing community of inventors

Yokohama, Japan

Takayuki Fukatani