3422 results about "Data migration" patented technology

Methods, apparatus and computer programs have been provided for mitigating a problem of non-optimal recovery from storage device failures. A method involves determining a required write performance for rebuilding data of a failed device, based at least partly on the potential read performance of storage devices in a data rebuild; and allocating a virtual storage area within available storage, which allocation of virtual storage is based at least partly on the required write performance. Data is rebuilt by writing to the allocated virtual storage area, and data recovery is completed by migrating this rebuilt data to at least one data storage device such as a spare physical storage device within the array.

Systems and methods for performing hierarchical storage operations on electronic data in a computer network are provided. In one embodiment, the present invention may store electronic data from a network device to a network attached storage (NAS) device pursuant to certain storage criteria. The data stored on the NAS may be migrated to a secondary storage and a stub file having a pointer pointing to the secondary storage may be put at the location the data was previously stored on the NAS. The stub file may redirect the network device to the secondary storage if a read request for the data is received from the network device.

The present invention provides a system and method for dynamic object-driven database manipulation and mapping system which relates in general to correlating or translating one type of database to another type of database or to an object programming application. Correlating or translating involves relational to object translation, object to object translation, relational to relational, or a combination of the above. Thus, the present invention is directed to dynamic mapping of databases to selected objects. Also provided are systems and methods that optionally include caching components, security features, data migration facilities, and components for reading, writing, interpreting and manipulating XML and XMI data files.

In one implementation, a storage system comprises host computers, a management terminal and a storage system having block interface to communicate with the host computers/clients. The storage system also incorporates a deduplication capability using chunks (divided storage area). The storage system maintains a threshold (upper limit) with respect to the degree of deduplication (i.e. number of virtual data for one real data) specified by users or the management software. The storage system counts the number of links for each chunk and does not perform deduplication when the number of reduced data for a chunk exceeds the threshold, even if duplication is detected. In another implementation, the storage system additionally incorporates a data migration capability and migrates physical data to high reliability area such as area protected with double parity (i.e. RAID6) when the deduplication level for a chunk exceeds the threshold.

In an SDN environment, data is migrated after checking whether the data conforms to a legal system of a migration destination. A control device changes a communication setting between first and second servers based on migration destination information and migration source information received from the first server and SDN setting data on a communication setting of the SDN stored in advance. The first server receives data on the legal system and determines whether the data conforms to the legal system to thereby determine whether the data can be migrated, or not. The control device executes a change in the communication setting when it is determined that the migration is enabled from the first server. The first server transmits data stored in a first storage unit to the second server according to the changed communication setting and the data is stored in a second storage unit.

A computer system includes a transparent data migration facility (TDNff) to accomplish automated movement of data (migration) from one location to another in the system. A data migration program includes a main module to control the start of a migration session when said application programs are using data accessed to and from the source volume, to migrate data from the source volume to the target volume, and to end the migration session whereby the application programs are using data accessed to and from the target volume. The data migration program includes a volume module to control the volumes during the migration session. The data migration program includes a copy module to control the copying of data from the source module to the target module during the migration session. The data migration program includes a monitor module for monitoring I/O transfers to the data volumes during the migration sessions. The computer system may have a plurality of operating systems associated with instances of the data migration program which allows for concurrent data migrations. The plurality of instances of the data migration program may also be controlled in a master slave relationship. A migration session may include a plurality of migration phases such as activation, copy, refresh, quiesce, synchronize, redirect, resume and termination phases.

A system including a storage processing device with an input/output module. The input/output module has port processors to receive and transmit network traffic. The input/output module also has a switch connecting the port processors. Each port processor categorizes the network traffic as fast path network traffic or control path network traffic. The switch routes fast path network traffic from an ingress port processor to a specified egress port processor. The storage processing device also includes a control module to process the control path network traffic received from the ingress port processor. The control module routes processed control path network traffic to the switch for routing to a defined egress port processor. The control module is connected to the input/output module. The input/output module and the control module are configured to interactively support data virtualization, data migration, data journaling, and snapshotting. The distributed control and fast path processors achieve scaling of storage network software. The storage processors provide line-speed processing of storage data using a rich set of storage-optimized hardware acceleration engines. The multi-protocol switching fabric provides a low-latency, protocol-neutral interconnect that integrally links all components with any-to-any non-blocking throughput.

Indirect access to local file systems is provided using storage tank protocols, allowing federation of a local file system into a distributed file system while preserving local access to the existing data in the local file system. The goal of the present system is to federate and migrate the data on a computer system with minimum disruption to applications operating on the computer system. Existing applications on a computer system continue to operate during data federation and migration and require little or no reconfiguration either when the data migration starts or when it ends. Data consistency is maintained: existing applications may modify data in the file system during migration or federation. During federation, other computer systems (or hosts) may modify the data in the file system if access control information allows them to do so. All changes in the file system are seen consistently on all hosts. Minimal downtime is required to install the present system and reconfigure the existing applications to communicate with the present system.

A technique is provided whereby a stream of data located in a first storage location is registered for migration administration and according to preset criteria, portion(s) of the stream of data that are suited to another storage location are migrated to maximize system storage efficiencies. The file system may have use of facilities that enable the monitoring of files/streams that have been registered for migration administration or files/streams may be polled according to preset criteria. If the stream of data has portions to migrate to another storage location, the hierarchical storage management (HSM) system migrates the data to the other storage location, such as to long term or off-line storage, and preserves the data relationships of the stream via metadata. The technique allows for multiple volumes to be spanned by the migration target location, and multiple file systems may service the source and target.

A virtual storage migration method is provided, including: starting a data migration process, and copying, from a source storage device to a destination storage device, a data block in a virtual disk to be migrated; when a VM front-end I/O read request is received, directly reading, corresponding data from the source storage device; when a VM front-end I/O write request is received, determining whether a migration data block that corresponds to the write request is being migrated, if yes, executing a write operation that corresponds to the write request after the migration of the migration data block is completed, if no, executing a write operation that corresponds to the write request; and after all the data blocks in the virtual disk to be migrated are copied to the destination storage device, stopping the data migration, and switching the virtual disk from the source storage device to the destination storage device.

Methods and systems are provided for minimizing disruptions when host data on a source logical unit is migrated onto a target logical unit. I/O requests are managed in a particular order during various states of the migration. After the target logical unit is synchronized with the source logical unit and before a commitment to the target logical unit is made, the target logical unit can be evaluated. At that point, the migration can be aborted. During the evaluation of the target logical unit, I/O requests that were directed to the source logical unit are redirected to the target logical unit and I/O requests that were directed to the target logical unit are redirected to the source logical unit. The disclosed methods and systems are equally effective at enabling less disruptive virtualization of a source logical unit as a target logical unit.

The invention provides a system and a method for data migration. The system specifically comprises a configuration reading module, a reading module, a data exchange buffer module and a writing module, wherein the configuration reading module is used for reading a configuration file of a data migration task, and the configuration file comprises data reading information and data writing information; the reading module is used for reading the data according to the data reading information in the configuration file and converting the read data into an intermediate format to be written into the data exchange buffer module; the data exchange buffer module is used for temporarily storing the written intermediate format data; and the writing module is used for reading the intermediate format data from the data exchange buffer module, writing the information according to the data in the configuration file and converting the intermediate format data into a target format to be written into a target address. By the system, the data migration performance can be improved, and the maintenance cost and the development cost which are spent on data migration are lowered.

The invention discloses a method for distributing metadata of a distributed type file system. The method uses a catalogue of the file system as a basic unit of Hash, adopts an extensible Hash method to distribute the metadata to each metadata server to ensure that clients can position the position of the metadata; the metadata has high accessing efficiency, even distribution and balanced load; meanwhile, the method maintains storage locality of the catalogue, realizes conveniently prefetching, and improves the accessing efficiency. A unique and unchanged identifier is given to the catalogue to avoid metadata migration caused by the path name of Hash and improve the system performance; participation or exit of the metadata server cannot cause redistribution of mass metadata so as to furthest reduce the metadata migration and ensure high expandability.

Disk failures can be statistically predicted at the platform level using information about disks attached to the storage platform and other platform-specific information. In one embodiment, the present invention includes collecting information about a plurality of disks, and predicting that an errant disk has a high likelihood of failure based on the information collected about the plurality of disks. In one embodiment, the invention also includes automatically migrating data from the errant disk to a health disk. In one embodiment, the migration is performed by triggering a RAID mirror event. Other embodiments are described and claimed.

A cloud data storage system is provided for multiple clients to access data of files comprising at least one node connecting to a first storage means; at least one namenode module for processing file operations issued from the clients, namenode module issuing data access instructions to access and maintain the metadata on the first storage means; at least one datanode module respectively executing on at least one node, each datanode module functioning to scan and access a second storage means connected thereto; at least one data import module selectively executing on nodes in which datanode module are executing, the data import module scanning a second storage means newly connected to the cloud data storage system and obtaining a corresponding metadata, and executing data migration operation for the data in second storage means without actual physical uploading operation.