Hitachi, Ltd.

Hidehisa Shitomi

Manabu Kitamura

Yasunori Kaneda

Takuya Okamoto

Akira Yamamoto

Yohsuke Ishii

Mitsuru Ikezawa

Takashi Oeda

Takahiro Nakano

Yuichi Yagawa

Yoji Nakatani

Yoshiki Kano

Tomoki Shoji

Kiyokazu Saigo

The present invention concerns one of the plurality of first storage apparatuses, prior to a file migration to the second storage apparatus, notifies to the second storage apparatus of file migration information being information relating to the file migration, the second storage apparatus calculates an increment of a load on the second storage apparatus that is generated by the file migration based on information written in the file migration information, the second storage apparatus determines whether the file migration is allowable based on a current load on the second storage apparatus itself and the increment, the second storage apparatus notifies the determination result to the one of the plurality of first storage apparatuses that has notified the file migration information, and the one of the plurality of first storage apparatuses determines whether to migrate the file to the second storage apparatus based on the determination result.

Information processing system and method for controlling the same

A storage system includes a virtual volume configured on a storage controller and mapping to a physical storage capacity maintained at a remote location by a storage service provider (SSP). The storage controller receives an I/O command in a block-based protocol specifying a logical block address (LBA). The storage controller correlates the LBA with a file name of a file stored by the SSP, translates the I/O command to an IP-supported protocol, and forwards the translated I/O command with the file name to the SSP for processing. In the case of a write command, the SSP stores the write data using the specified file name. In the case of a read command, the SSP enables download of data from the specified file name. In an alternative embodiment, a NAS head may replace the storage controller for correlating the LBA with a file name and translating the I/O command.

Method and apparatus for storage-service-provider-aware storage system

For each of multiple migration policies, a server systemthat accesses a storage apparatusobtains a resource use amount needed to execute the migration. Each of the migration policies includes information for specifying a resource use amount of the server systemneeded to execute the migration according to the policy. Then, the server systemallocates an amount of usable resources to each of the policies in accordance with the resource use amount obtained for the policy; in the migration according to each of the policies, allocates a certain amount of resources usable for executing the migration, to the virtual server which serves as either of a migration destination and a migration source, while determining the certain amount of resources within the amount of resources allocated to the policy; and executes the migration according to each of the policies in accordance with the resource use amount allocated to the policy.

Method for executing migration between virtual servers and server system used for the same

For the purpose of optimizing the performance separation according to the usage status of the protocol and the storage system performance, in a storage systemincluding multiple storage deviceswhich includes a storage controlling unitperforming data write to or data read from a storage driveaccording to data input/output requests from an external deviceand a protocol processing unitthat responds to a processing result for the input/output requests to the external deviceand is capable of responding to data input/output requests transmitted from the external devicefollowing at least two or more protocols, in which each of the storage devicesincludes a cluster processing unitconfiguring clusterswith the other storage devicesfor the external deviceand a cluster processing unitthe cluster processing unitis set to configure cluster groupsfor each protocol.

Performance separation optimization according to protocol usage status and storage system performance

Data migration is efficiently executed with optional timing. A file server outputs an instruction to a CPU of a storage apparatus to migrate a file belonging to Tierto Tierwhen, based on policy information, a condition for migrating the file belonging to Tierto Tieris fulfilled. Based on the instruction from the file server, the CPU copies the data of migration target files in Tierfrom a page to a Tiervirtual page, copies the data which has been copied to the Tiervirtual pageto a Tiervirtual page, copies the data which has been copied to the Tiervirtual page to any page in Tier, and then overwrites and releases the Tierand Tiervirtual pages, and migrates files belonging to Tierto Tier

Storage system and method of controlling same

Remote replication is implemented with hierarchical storage. In exemplary embodiments, a first storage site has a first storage system providing an upper tier of storage and a second storage system providing a lower tier of storage. A remote second storage site has third and fourth storage systems configured to receive remote replication from the first and second storage systems, respectively. When a file is migrated from the upper tier to the lower tier, a stub file is stored in place of the migrated file indicating a storage location of the migrated file on the second storage system. When copies of the migrated file and the stub file are replicated to the fourth and third storage systems, respectively, information is transmitted to the second storage site for linking the copy of the stub file at the third storage system to the copy of the migrated file at the fourth storage system.

Integrated remote replication in hierarchical storage systems

A unified storage system for executing a variety of types of storage control software using a single standardized hardware platform includes multiple storage control modules connected to storage devices for storing data related to input/output (I/O) operations. A first type of storage control software is initially installed and executed on a first storage control module for processing a first type of I/O operations. A management module replaces the first type of storage control software by installing a second type of storage control software onto the first storage control module. When the second type of storage control software is installed and executed, the first storage control module processes a second type of I/O operation, different from the first type of I/O operation. Control of volumes originally accessed by the first storage control module may be transferred to a second storage control module having the first type of storage control software installed.

Method and apparatus for a unified storage system

By incorporating a referral mechanism, a failover method and system for remotely mirrored clustered file servers enables a client computer to transparently access a remotely mirrored file system during a failover of a first NAS (network attached storage) storing the file system. The first NAS is clustered with a second NAS that takes over the IP address of the first NAS on failover. A mirroring relationship is established between the first NAS and a third NAS whereby a copy of the file system is replicated to the third NAS. A referral is created on the second NAS, such that an access attempt from the client computer for accessing the first file system that is directed to the second NAS following IP address takeover from the first NAS after failover is referred to the third NAS by the referral to enable the client computer to access the copy of the file system.

Failover method of remotely-mirrored clustered file servers

A sort server including a central processing unit, a memory and a network interface configured to interconnect the sort server with a search server, at least one storage system and multiple processing servers using at least one network. The sort server is configured to receive a search result from the search server and to assign multiple tasks to the processing servers. The assignment of the multiple tasks is based on a condition including the search result. Assignment of the tasks to servers may be based on CPU load of at least some of the multiple servers, network architecture, network distance between the servers and the storage system storing the required object, failure information, urgency of the task, Level Agreement associated with the servers and other tasks performed by the servers.

Method and apparatus for unstructured data mining and distributed processing

A system and a method for causing migration of VNASs formed on NAS heads of one NAS system to other NAS heads on the same NAS system or on other NAS systems including independent storage systems. A VNAS management program on each NAS head includes a VNAS assign program, a failure detect program and a load balance program, that all include a capability for causing remote migration of VNASs on the NAS head in case a VNAS fails, the NAS head fails, or the entire NAS system fails. The VNAS management capability may cause VNAS migration if a NAS head is over loaded or if it is lightly loaded and may be powered down after its VNASs have been transferred.

Method and apparatus for virtual network attached storage remote migration

An apparatus, system, and method for replicating a snapshot volume in a first storage system to a second storage system includes mapping information corresponding to data in the first storage system that is transferred from the first storage system to the second storage system so that a file system in the second storage system can mount the data after replication. Replication of the snapshot volume can be accomplished using a remote copy mechanism. The snapshot volume can be obtained from a primary source volume P-VOL and a differential source volume D-VOL. If the corresponding destination volumes are not known, a search is conducted to locate appropriate volumes in the second storage system. Mapping information regarding these destination volumes is utilized to enable the file system in the second storage system to mount the replicated snapshot volume.

Method for replicating snapshot volumes between storage systems

An integrated NAS/CAS system is disclosed. The system includes a view management program that is able to provide a NAS view and a CAS view of files to NAS and CAS clients. The system applied NAS or CAS features to stored files according to the view status of the file. Migration of files from NAS to CAS for archiving may be done without transmitting the file, thereby reducing bandwidth requirements and increasing security. CAS features, such as retention policy and metadata can be added to the file when its view is changed from NAS to CAS.

Growing community of inventors

Mountain View, CA, United States of America

Hidehisa Shitomi