摘要:
Various embodiments for an Input/Output (I/O) path selection based on workload types are provided. A port workload controller is adapted to control the workload types of ports for accessing a storage device. A storage access command is received by the port workload controller from an application being executed on a virtual server on a physical server. The workload types related to the storage access command are determined. Storage access paths between the application and the storage device having the same workload types as the determined workload types related to the storage access command are determined. Storage access paths mapping data that is controlled by the port workload controller is used. A selected storage access path is selected out of the determined storage access paths having the least utilization. The storage device is accessed via the selected one of the plurality of storage access paths.
摘要:
A mechanism is provided for optimizing migration/copying of de-duplicated data from an internal storage system to a removable storage system. A preliminary number of clusters to be generated are determined for sets of data objects stored on the internal storage system based on a number of the sets of data objects. The preliminary number of clusters is generated based on shortest distances between the sets of data objects, each cluster comprising one or more sets of data objects and each set of data objects comprising one or more chunks of data. A chosen cluster is identified from a set of clusters by identifying a cluster having a greatest number of common chunks within as few sets of data objects. Responsive to an export-size of the chosen cluster failing to exceed the available storage capacity of the removable storage system, the chosen cluster is exported to the removable storage system.
摘要:
Method, data processing systems, and computer program products are provided for virtualizing and managing a storage virtualization system (SVS) in a storage management architecture. Source data is copied from the source storage media to target data in a target storage media based on a predefined copy policy in a copy mapping table. A relation between the source data and the target data is tracked in a copy mapping table. It is determined if a copy of the requested data exists using the copy mapping table. A least utilized storage system having a copy of the requested storage media is determined. Access to the requested storage media in the least utilized storage system is tested. If access is not possible, access to a copy of the requested storage media in another storage system is provided by updating a frontend-backend mapping table and forwarding all data access commands to the other system.
摘要:
A power transmission mechanism for transmitting power between a driving engine and an output drive, including: an input and an output; a hydrodynamic component with a pump wheel and a turbine wheel; an apparatus for at least partially bridging over the hydrodynamic component, the apparatus including a control device with a piston element that is chargeable with pressurizing agent; an influencing element for influencing a difference in speeds of rotation of moving fluids on both sides of the piston element, the influencing element rotatable in rotational synchronicity with the piston element, which extends outward in the radial direction free of any direct connection with the piston element, and which is situated in the radial direction at least in the range of the outside diameter, forming at least part of an axial space with the piston element.
摘要:
A torsional vibration damper with a friction device. The friction device is formed on at least one friction surface on two contra-rotationally and oppositely disposed disc parts that are in frictional contact with one another. In order to propose how to determine the initial stressing effect of the frictional action independently of external support of the disc parts, the frictional surfaces are pressurized against one another by means of at least one spring element.
摘要:
A power transmission device for configuration in a drive train between a prime mover and a power take-off with a hub element forming an output and a damper configuration connected upstream of the output, including at least two dampers disposed in radial direction offset relative to one another and coupled with one another—a first damper forming a main damper stage and a second internal damper—wherein the second internal damper is coupled with the hub.The dampers forming individual damper stages can be preassembled respectively as a unit and are connected with one another via a coupling.
摘要:
A hydrodynamic torque converter has a rotary housing which carries a pump assembly and can be driven by the output element of a prime mover in the power train of a motor vehicle, a turbine which is rotatable in the housing and has a hub mounted on the input shaft of a change-speed transmission, and a lockup clutch which, when engaged, can transmit torque from the housing directly to the turbine. The axially movable piston of the clutch is rotatable with the housing; this piston defines a first chamber with the housing and a second chamber with the turbine. The first chamber can receive pressurized hydraulic fluid to cause the piston to disengage the clutch so that the turbine can be rotated by the pump assembly by way of the body of fluid in the housing between the pump assembly and the turbine. The second chamber can receive fluid along at least one first path to engage the clutch by moving the piston toward the housing, and along at least one second path when the clutch is at least partially engaged.
摘要:
A mechanism is provided for optimizing migration/copying of de-duplicated data from an internal storage system to a removable storage system. A preliminary number of clusters to be generated are determined for sets of data objects stored on the internal storage system based on a number of the sets of data objects. The preliminary number of clusters is generated based on shortest distances between the sets of data objects, each cluster comprising one or more sets of data objects and each set of data objects comprising one or more chunks of data. A chosen cluster is identified from a set of clusters by identifying a cluster having a greatest number of common chunks within as few sets of data objects. Responsive to an export-size of the chosen cluster failing to exceed the available storage capacity of the removable storage system, the chosen cluster is exported to the removable storage system.
摘要:
Various embodiments for managing a virtual tape library cluster are provided. A virtual tape library system is enhanced by representing virtual tape resources in cluster nodes with a unique serial number. A least utilized cluster node is determined. One of the virtual tape resources represented within the least utilized cluster node is selected.
摘要:
A centrifugal pendulum mechanism that includes a pendulum flange and pendulum masses which are fastened on both sides of the pendulum flange by a spacing bolt accommodated in a curved cutout of the pendulum flange to form a pair of pendulum masses, where the pair of pendulum masses is guided relative to the pendulum flange by the at least two rollers and can be pivoted restrictively because of a stop, where the rollers are accommodated in curved guide tracks in the pendulum masses and in complementary curved guide tracks in the pendulum flange and can be rolled, and at least two pairs of pendulum masses are arranged so as to be circumferentially adjacent to each other.