88results about How to "Maintain availability" patented technology

A distributed gateway for controlling computer network data traffic dynamically reconfigures traffic assignments among multiple gateway machines for increased network availability. If one of the distributed gateway machines becomes unavailable, traffic assignments are moved among the multiple machines such that network availability is substantially unchanged. The machines of the distributed gateway form a cluster and communicate with each other using a Group Membership protocol word such that automatic, dynamic traffic assignment reconfiguration occurs in response to machines being added and deleted from the cluster, with no loss in functionality for the gateway overall, in a process that is transparent to network users, thereby providing a distributed gateway functionality that is scalable. Operation of the distributed gateway remains consistent as machines are added and deleted from the cluster. A scalable, distributed, highly available, load balancing network gateway is thereby provided, having multiple machines that function as a front server layer between the network and a back-end server layer having multiple machines functioning as Web file servers, FTP servers, or other application servers. The front layer machines comprise a server cluster that performs fail-over and dynamic load balancing for both server layers.

A high tier storage area stores a stub file and a lower tier cloud storage area stores the file corresponding to the stub file. When a client apparatus requests segments of the file from the high tier storage area, reference is made to the stub file to determine a predicted non-sequential pattern of requests to the segments by the client apparatus. The high tier storage area follows the predicted non-sequential pattern of requests to retrieve the segments of the file from the cloud prior to the client apparatus actually requesting the segments. As such, the file may be efficiently provided to the client apparatus while also efficiently storing the file on the lower tier cloud storage area.

A modeling system for universal specification of user interfaces. The system provides a means for defining user interfaces, including highly complex and dynamic user interfaces, in a manner that is independent of any implementation context. The modeling system leads from a user-friendly visual representation of the user interface, through progressively detailed specifications of structural and behavioral aspects of the user interface parts, until a rigorous definition of the user interface in all its contexts of use is achieved. Using the information captured in the model, tools that automatically generate the fully working user interface code can be built.

A method and apparatus for managing a migration of a data set from at least one first storage location to at least one second storage location, wherein read requests to the data set from at least one application program executing on a computer system initially are serviced from the at least one first storage location. The data set is copied from the at least one first storage location to the at least one second storage location, and then at least one aspect of the computer system is modified so that read requests to the data set are serviced from the at least one second storage location to achieve the migration. In one embodiment, the migration is subsequently undone by modifying the at least one aspect of the computer system so that read requests to the data set are again serviced from the at least one first storage location. In another embodiment, after the migration is performed, a determination is made as to whether to finalize the migration.

Methods and apparatus for migrating a logical object. In one embodiment, a migration is performed by automatically determining the source location(s) of the logical object, moving the data stored therein to a target location while maintaining the availability of the data at the source location to an application program, and automatically servicing access requests from the application program at the target location after moving the data. In another embodiment, a migration is performed by automatically provisioning target location(s) to store a logical object, moving the data in the logical object to the target location(s) while maintaining its availability to an application program, and automatically servicing access requests from the application program at the target location after moving the data. In a further embodiment, a migration is performed by moving the data within a logical object from a source logical volume to a target logical volume, automatically servicing access requests from an application program at the target logical volume after moving the data, and retiring the source logical volume.

Within a moving robot of narrow footprint, having quick traveling performance on a plane-surface, as well as, anti-tumbling function, and further being suitable for operations under coexistence with a human being, being able to travel coping with traveling situations on a level difference, etc.: in front and rear of main driving wheels 2 and 3, each being controlled through the inverted pendulum control, are disposed supporting legs 4 and 5, tips of which can be lifted up and down, wherein the tips of the supporting legs 4 and 5 are positioned to keep a predetermined distance between a traveling surface, when running on the inverted two-wheels travel, and the supporting legs 4 and 5 are fixed or either one in the fall-down direction is thrust out into the fall-down direction, so as to protect it from falling down. Further, upon the basis of detection information of floor-surface distance sensors 4e and 5e and side-surface distance sensor 4f, 4g, 5f and 5g, which are provided at the tips of the supporting legs 4 and 5, the robot senses an existence of a level difference and/or an inclined surface, so as to let the supporting legs to escape from the level difference and/or the inclined surface, and holds the position of gravity center thereof, stably, through other one of the supporting legs, being landed on the ground, and the main driving wheels 2 and 3; thereby enabling to travel over the level difference and the inclines surface.

In the mobile telephone 1 relating to the present invention, a control section 2 performs control for switching between a non-active state which refuses inputs to an application program, and a rest state in which the application program is temporarily halted. The control section 2 performs control for switching the execution state of the application program from the non-active state to the rest state, in accordance with instructions from an input section 3. The control section 2 further performs control for switching the execution state of the application program from the non-active state to the rest state, in accordance with a function contained in an application program.

The invention relates to a downgrading management system of a train control system based on train-train communication. The downgrading management system comprises a safety equipment trackside TKTC system, a safety equipment ID device and a safety equipment ID reader, wherein the safety equipment trackside TKTC system is in communication connection with a vehicle-mounted CC, a safety equipment trackside TKIC, an ATS and the safety equipment ID reader; the safety equipment ID device is in communication connection with the safety equipment ID reader correspondingly; and when the vehicle-mounted CC fails or the train-ground wireless safety communication fails to downgrade, the safety equipment trackside TKTC system performs tasks instead of the vehicle-mounted CC. Compared with the prior art,the downgrading management system can still maintain the normal operation of a failed train and other trains when the vehicle-mounted fault of the train control system based on the train-train communication is downgraded, and the availability and safety of the whole system are ensured.

The invention provides nucleotide analogs for use in sequencing nucleic acid molecules.

A seat apparatus for a vehicle includes a conversion mechanism that converts a disposition of a seatback between a normal position to a converted position, the normal position being a position at which the seatback is disposed at a rear section of the seat cushion and a sitting direction of an occupant is facing forward, the converted position being a position at which the seatback is disposed at a front section of the seat cushion and a sitting direction of an occupant is facing rearward, and a reclining mechanism that biases the seatback toward a neutral position at which the seatback stands upward and that reclines the seatback forward and rearward from the neutral position.

A pattern image of either a registration correction pattern including a plurality of position detecting marks or a misregistration correction performing determination pattern having a plurality of position detecting marks, the number of which marks is smaller than that of the registration correction pattern image is formed. A misregistration amount is calculated based on an image formed position detected with the use of the pattern image. It is determined whether the registration correction is to be carried out, based on the misregistration amount with the use of an image formed position of the correction performing determination pattern. When it is determined to carry out the misregistration correction, the misregistration correction is carried out based on the misregistration amount with the use of image formed positions of the misregistration correction pattern.

This disclosure enables a user to incrementally increase or decrease the size of the cluster and, in particular, to incrementally increase or decrease the number of map regions implemented in a metadata manager associated with the cluster while maintaining availability of the cluster. In a representative embodiment, a configurable target map size is identified, either manually (e.g., by the user) or programmatically. If the target map size is found to be within an acceptable value (given the available node configuration), a procedure to create a new map is triggered. The new map preferably is generated as follows. Initially, one or more new temporary region(s) are created either to split or join the existing regions (depending on whether the map is being increased or decreased). For each temporary region, the process also generates MDPL backup regions. Metadata from an original region (or regions) is then migrated to the temporary region(s). Once the migrations have been completed, the old region or regions (from which the metadata is migrated) are removed and what were the temporary regions are, in effect, promoted. The result is the new map.

Provided are a system, method and computer program product for redistribution of data in an online shared nothing database, said shared nothing database comprising a plurality of original partitions and at least one new partition. Said method comprising: a collocation-set identifier for identifying two or more collocated tables in the original partitions to be redistributed over the original partitions and at least one new partition, said tables having data rows, each data row residing on a partition governed by a distribution key; a table factory for creating corresponding new tables in the new partition; a view creator for creating a UNION ALL view of all the data from both the original and new tables using the check constraints, said check constraints in turn based on the distribution keys; a counter for defining a loop of intervals over the distribution key range; a data mover for performing data movement of each data row over the current distribution key interval from the original tables to the new tables; a data changer for altering the check constraints for each distribution key interval so that the UNION ALL view is preserved thereby ensuring collocation and data integrity is maintained; a loop finisher for looping back for the next distribution key interval until all the distribution key intervals have been processed such that all the data has been moved to the new table whereby collocation and data integrity is maintained, redistribution is transparent for queries performed on the database, and tables are fully available during redistribution for read and write.

Pressurized and superheated, dry steam is admitted into the working chamber of a spark ignition engine for the purpose of increasing the thermal efficiency of the engine. The steam is admitted into the working chamber near the end of compression, and before ignition of the fuel. An igniter ignites the fuel. Additional work is pneumatically recovered from the steam, thus augmenting the total work obtained by the engine.

A system and method for cryptography. The system may include a cryptography module in communication with a database and configured to perform cryptography operations on data in the database, a rotation module configured to rotate data in the database, and one or more application interfaces configured to remain responsive while the rotation module rotates the data in the database. Rotating the data in the database may include decrypting a stored value in a system with a first key to produce a decrypted value, encrypting the decrypted value with a second key to produce an encrypted value, and replacing the stored value with the encrypted value.

Process for producing wines with a high alcohol content, using 4 or 5 fermentation bioreactors, wherein the ferment is recovered, reactivated and recycled by separating the yeast-free wine from the ferment, yeast treatment with acid, separating the cells from the weak water and reactivating the cells by adding nutrients. The fermentation step takes place in an equipment that has a novel design, as well as the separation step.