Abstract: In a method for determining a winding temperature of a winding of an electric motor, a measurement operating state of the electric motor is specified for measuring an electrical winding resistance of the winding, with the measurement operating state being specified by an operating state in which an electric current flowing in the winding is modulated with a modulation frequency. The winding resistance is measured in the measurement operating state of the electric motor, with the winding resistance being calculated from modulations of the electric current and an associated electric voltage that is applied to the winding. The winding temperature is calculated from the measured winding resistance. In an operating state of the electric motor which operating state is different from a measurement operating state, the winding temperature is calculated from an operating parameter of the electric motor using a thermal model.

Abstract: The technology disclosed herein enables enforcement of Information Lifecycle Management (ILM) policies across tenants in an object storage system using tags associated with the ILM policies. In a particular example, a method includes identifying ILM policies for an object storage system having multiple tenants and associating respective tags with the ILM policies. The method further includes enabling a subset of the tags to be assigned to data objects of a tenant of the multiple tenants and enforcing a portion of the ILM policies on the data objects, wherein the portion of the ILM policies corresponds to tags of the subset assigned to the data objects.

Abstract: A method and system for migrating massive amounts of data in a secure and traceable fashion using a distributed storage system is described. Data shuttle storage devices moves large quantities of content from one source location to one or more target locations by first acting in local communication with the source location, then being physically moved to a location where a shuttle storage device may be in local communication with the target location. This migration does not compromise data accessibility, reliability, or security. Dynamic configurable policy-driven data placement specifies the number and location of multiple copies of each digital data object. Each digital data object replica remains traceable even as the hardware onto which it is stored is being relocated. The content remains accessible at any time.

Abstract: This disclosure describes identification of fixed content objects in a distributed fixed content storage system. Unique object identifiers are assigned in a distributed object storage system which consists of a plurality of storage media interconnected over networks subject to disruptions. The object identifier assignment prevents object identifier collisions in a distributed non-connected system regardless of the numbers of objects being stored and ensures continued operation of the object storage system in the presence of network disruptions without requiring unique identifiers for entities performing allocations. Embodiments may be used within any system where there is a need for globally unique identifiers, and the allocation of the globally unique identifiers needs to occur in the absence of network connectivity. The globally unique identifiers may be transformed for security purposes.

Abstract: A method and apparatus for the management of the placement of immutable fixed-content objects in a distributed, multi-site, multi-tier non-volatile storage hierarchy consisting of a plurality of storage media connected together over networks of varying bandwidth where the computing, storage, and network resources are subject to failure. The disclosure provides for scalability, performance, and robustness by distributing the object placement management tasks amongst a plurality of computing resources and eliminating the need for global synchronization or locking amongst said computing resources.

Abstract: This disclosure describes identification of fixed content objects in a distributed fixed content storage system. Unique object identifiers are assigned in a distributed object storage system which consists of a plurality of storage media interconnected over networks subject to disruptions. The object identifier assignment prevents object identifier collisions in a distributed non-connected system regardless of the numbers of objects being stored and ensures continued operation of the object storage system in the presence of network disruptions without requiring unique identifiers for entities performing allocations. Embodiments may be used within any system where there is a need for globally unique identifiers, and the allocation of the globally unique identifiers needs to occur in the absence of network connectivity. The globally unique identifiers may be transformed for security purposes.

Abstract: A method and apparatus for the management of the placement of immutable fixed-content objects in a distributed, multi-site, multi-tier non-volatile storage hierarchy consisting of a plurality of storage media connected together over networks of varying bandwidth where the computing, storage, and network resources are subject to failure. The disclosure provides for scalability, performance, and robustness by distributing the object placement management tasks amongst a plurality of computing resources and eliminating the need for global synchronization or locking amongst said computing resources.