Abstract: A roller bearing assembly configured to guide linear movement of a shaft with a polygonal cross section. The roller bearing assembly includes a housing unit, which may contain a centrally-placed hole for mounting the assembly, and a plurality of cavities on the surface of both ends of the housing unit. The bearing assembly further includes a plurality of axially-displaceable roller bearings placed in one or more sets of pairs in the cavities of the housing. The roller bearings contact the shaft to guide movement axially and to resist torque, and thereby prevent the rotation of the shaft relative to the housing unit.

Abstract: A fixture for temporarily mounting connectors of a plurality of cable assemblies is provided for use while replacing an electronic component having a plurality of receptacles. Each cable assembly has a connector disposed in one of the receptacles. The fixture includes a body, an array of cavities disposed on the body, and an array of body indicia. Each cavity receives one of the connectors therein and each body indicia is disposed adjacent one of the cavities, with each body indicia being unique relative to other body indicia. A plurality of the pluggable identifier elements are provided with each pluggable identifier element being pluggable into one of the cavities and including an element indicia. Each element indicia corresponds to one of the body indicia and is unique relative to other element indicia. A kit of pluggable identifier elements and a method of replacing an electronic component is also provided.

Abstract: At a logging service, a representation of a transaction requested by a client is received. The transaction includes at least a first write operation directed to a data object at a first data store. Based at least in part on the contents of the representation and contents of a persistent log of the logging service, a determination is made that the requested transaction is to be committed. A log record corresponding to the first write operation is inserted into the persistent log. The first write is propagated to the first data store after the record has been inserted in the persistent log.

Abstract: A technology is described for providing a nondeterministic value to computing instances executing an application as part of a high availability system. An example method may include receiving a request for a nondeterministic value at a physical host that hosts a first computing instance, where the request may be for an application executing on the first computing instance. A nondeterministic value may be obtained from a nondeterministic value source located on the physical host and provided to the application executing on the first computing instance. A second request from a second computing instance may be received at the physical host, where the second request may be associated with a copy of the application executing on the second computing instance. The nondeterministic value may then be identified in the computer memory of the physical host and provided to the second computing instance over a computer network.

Abstract: Deployment feedback for updates to resources implemented in a private network may be implemented. Feedback codes may be generated and included in deployments sent to a private network for deployment at resources implemented in the private network. One or more of the included feedback codes may be selected based on the performance of the deployment and provided via a feedback communication channel that is disconnected and distinct from the private network. Once received, a current status of the deployment may be determined based on the one or more feedback codes provided via the feedback communication channel.

Abstract: Methods and apparatus for providing scalable private services in service provider networking environments. A service provider that provides a large, public, multi-tenant implementation of a web service to multiple customers via a public API endpoint may allow a customer to request the establishment of a private implementation of the service. In response, a service private instance may be automatically and/or manually established for the customer that provides a private API endpoint to the service and that is at least in part implemented on single-tenant hardware that is not shared with other customers. The service private instance may initially be implemented as a relatively small scale and possibly limited implementation of the service when compared to the service public instance. As the needs of the customer grow, the service private instance may be automatically and/or manually scaled up from the initial implementation.

Abstract: At a logging service, a representation of a transaction requested by a client is received. The transaction includes at least a first write operation directed to a data object at a first data store. Based at least in part on the contents of the representation and contents of a persistent log of the logging service, a determination is made that the requested transaction is to be committed. A log record corresponding to the first write operation is inserted into the persistent log. The first write is propagated to the first data store after the record has been inserted in the persistent log.

Abstract: Methods and systems for a topology service providing an interface for specifying a topology and answering queries regarding the topology. Further, the topology service may create, from a specified topology, a directed acyclic graph and corresponding closure table. The topology service may also provide an interface for receiving metadata regarding the topology. In this way, the topology service, based at least in part on connections between nodes in the entries of the closure table and based at least in part on the metadata regarding the topology, may answer queries in regard to the specified topology.

Abstract: Methods and systems for a topology service providing an interface for specifying a topology and answering queries regarding the topology. Further, the topology service may create, from a specified topology, a directed acyclic graph and corresponding closure table. The topology service may also provide an interface for receiving metadata regarding the topology. In this way, the topology service, based at least in part on connections between nodes in the entries of the closure table and based at least in part on the metadata regarding the topology, may answer queries in regard to the specified topology.

Abstract: Methods and apparatus for providing scalable private services in service provider networking environments. A service provider that provides a large, public, multi-tenant implementation of a web service to multiple customers via a public API endpoint may allow a customer to request the establishment of a private implementation of the service. In response, a service private instance may be automatically and/or manually established for the customer that provides a private API endpoint to the service and that is at least in part implemented on single-tenant hardware that is not shared with other customers. The service private instance may initially be implemented as a relatively small scale and possibly limited implementation of the service when compared to the service public instance. As the needs of the customer grow, the service private instance may be automatically and/or manually scaled up from the initial implementation.

Abstract: A computer cursor control system (10) including a foot operated cursor control device (16) connected to a Central Processing Unit (CPU) (12). The cursor (20) is positioned by the operator (18) by depressing a left pedal (24), a right pedal (26), or both. Reverse movement is provided using a left or right reverse button (28, 30) on a keyboard (22). Response sensitivity of cursor (20) movement is provided in a control window (40), with individual left and right pedal controls (42 and 44).

Abstract: A computer cursor control system (10) including a foot operated cursor control device (16) connected to a Central Processing Unit (CPU) (12). The cursor (20) is positioned by the operator (18) by depressing a left pedal (24), a right pedal (26), or both. Reverse movement is provided using a left or right reverse button (28, 30) on a keyboard (22). Response sensitivity of cursor (20) movement is provided in a control window (40), with individual left and right pedal controls (42 and 44).