Abstract: Systems and methods for providing object versioning in a storage system may support the logical deletion of stored objects. In response to a delete operation specifying both a user key and a version identifier, the storage system may permanently delete the specified version of an object having the specified key. In response to a delete operation specifying a user key, but not a version identifier, the storage system may create a delete marker object that does not contain object data, and may generate a new version identifier for the delete marker. The delete marker may be stored as the latest object version of the user key, and may be addressable in the storage system using a composite key comprising the user key and the new version identifier. Subsequent attempts to retrieve the user key without specifying a version identifier may return an error, although the object was not actually deleted.

Abstract: A power conversion unit may include two or more power modules for providing high-voltage direct current power to electrical loads, such as one or more propulsion motors aboard an aerial vehicle. Each of the power modules may be controlled by hysteresis, and may include one or more pairs of transistors that are switched by a gate driver with respect to differences between a reference current and a sensed current passing through a boost inductor. The number, size and shape of the power modules may be selected to accommodate the electrical loads, and may be switched on or off, as necessary. The power conversion unit may feature at least one more power module than is required to meet all anticipated electrical loads, thereby ensuring that the power conversion unit may continue to provide power even in the event that one of the power modules experiences a fault of any kind.

Abstract: Functionality is disclosed herein for converting shared files to message attachments. A message interface is displayed that allows a user to compose an electronic message and to specify files to attachments. For example, a user may use a messaging client to specify the files to be converted to an attachment. The files that are specified to be attached to the electronic message are stored by a sharing service that is separate from the messaging service. Instead of downloading the specified files to the messaging client, the sharing service communicates the specified files directly to the messaging service. In this way, the amount of data downloaded to the messaging client associated with the computing device is reduced. When the user sends the message, the messaging client sends the message with the attachments to one or more recipients.

Abstract: A computer-implemented service uses information associated with a client device to generate a first shared secret. The service receives, from the client, a claim of access to a second shared secret and determines whether the first shared secret and the second shared secret match. If the shared secrets match, the service uses the first shared secret to encrypt a one-time password. The service provides the encrypted one-time password to the client device. The client device transmits a claim of access to the one-time password, which the service uses to determine whether the claim of access to the one-time password indicates access to the one-time password. If the claim of access to the one-time password indicates that the client device has access to the one-time password, the service allows the client device to access the service.

Abstract: A machine and associated methods are provided to decouple the level of detail shown within a map from the zoom level of the map. A user interface is provided to receive commands to increase or decrease the level of detail of items shown in a map, including the number of geographical elements shown in the map, independent of a control of a change in the zoom level for the map. Rendering circuitry can responsively render different versions of a map having different levels of detail within the same zoom level. The different versions of the map can be displayed on a display device.

Abstract: Autonomous vehicles may be deployed to areas where an item is in demand, and configured to fulfill orders for the item received from the areas. The autonomous vehicles are loaded with the item and dispatched to the area under their own power or in a carrier. When an order for the item is received, an autonomous vehicle delivers the item to a location in the area. Autonomous vehicles may also be equipped with a 3D printer or other equipment and loaded with materials for manufacturing the item. When an order for the item is received, the autonomous vehicle manufactures the item from such materials, and delivers the item. Autonomous vehicles may be configured for collaboration, such as to deliver or manufacture items in multiple stages and to transfer the items between vehicles. Autonomous vehicles may also be configured to automatically access locations in the area, e.g., using wireless access codes.

Abstract: A system and method for performing edit actions on media of a first resolution, wherein the media of the first resolution is obtained from a media capture device and the media of the first resolution is stored in a data store. A set of edit actions is obtained, wherein the set of edit actions were previously applied to media of the second resolution, wherein the media of the second resolution is a lower-resolution copy of the media of the first resolution, and edited media is produced by applying the set of edit actions to the at least a portion of the media of the first resolution.

Abstract: Given a current configuration of virtual node groups in a computing cluster and a new configuration indicating one or more changes to the virtual node groups, a cluster manager generates a reconfiguration plan to arrange virtual nodes into the desired virtual node groups of the new configuration while minimizing a number of virtual nodes to be moved between physical nodes in the computing cluster.

Abstract: A log-structured data store may implement optimized log storage for asynchronous log updates. In some embodiments, log records may be received indicating updates to data stored for a storage client and indicating positions in a log record sequence. The log records themselves may not be guaranteed to be received according to the log record sequence. Received log records may be stored in a hot log portion of a block-based storage device according to an order in which they are received. Log records in the hot log portion may then be identified to be moved to a cold log portion of the block-based storage device in order to complete a next portion of the log record sequence. Log records may be modified, such as compressed, or coalesced, before being stored together in a data block of the cold log portion according to the log record sequence.

Abstract: Methods, apparatus, and computer-accessible storage media for shadowing data stored on a local store to a remote store provided by a service provider. A gateway may be configured as a shadowing gateway on a customer network in response to receiving configuration information. The shadowing gateway may receive reads and writes to the local store. The gateway passes the requests to the local store, and also uploads write data indicated by the writes to the service provider to update a snapshot of the local store maintained by the service provider on the remote store. The write data may be buffered to a write log for uploading, and may be uploaded as blocks according to a block storage format used by the service provider. The shadowing process may be transparent to processes on the customer network. The shadowed data may be used to recover data on the local store.

Abstract: Techniques for analyzing stored video upon a request are described. For example, a method of receiving a first application programming interface (API) request to analyze a stored video, the API request to include a location of the stored video and at least one analysis action to perform on the stored video; accessing the location of the stored video to retrieve the stored video; segmenting the accessed video into chunks; processing each chunk with a chunk processor to perform the at least one analysis action, each chunk processor to utilize at least one machine learning model in performing the at least one analysis action; joining the results of the processing of each chunk to generate a final result; storing the final result; and providing the final result to a requestor in response to a second API request is described.

Abstract: A rack computer system can provide data indicating electrical power consumption by separate sets of the mass storage devices, including separate individual mass storage devices, of the rack computer system. A power sensor can be electrically coupled to a power transmission line for each mass storage device. The power sensor can be coupled to the power transmission line externally to the mass storage device. The power sensor can be an internal power sensor of the mass storage device, where a mass storage device microcontroller transmits internally-generated data to an external power monitoring system. A microcontroller can transmit the data to a baseboard management controller via a side-band connection between the mass storage device and the controller. The data can be transmitted via an in-band connection between a baseboard management controller and an instance of firmware which accesses internally-generated data from mass storage device microcontrollers.

Abstract: Provided are systems and methods for managing historically large flows in network visibility monitoring. In some implementations, provided is an integrated circuit. The integrated circuit may be operable to receive packet information describing a packet at the cycle of a clock input. The packet may be associated with a packet flow being transmitted across a network. The integrated circuit may further generate keys using information identifying a packet flow provided by the packet information. The integrated circuit may further read values for counters and state information associated with each counter from a memory, using the keys. The integrated circuit may further determine from the state information that the packet flow identified by the packet information is a historically large packet flow. Upon determining that the packet flow is a historically large packet flow, the integrated circuit may further update an entry in a flow memory using the packet information.

Abstract: Systems and methods are provided for managing a conference call with multiple voice-enabled and voice-capturing devices, such as smart speakers. Reproduced, duplicate voice commands can cause unexpected results in a conference call. The voice commands can be determined to be received from the same conference call. A voice command for a particular voice-enabled device can be selected based on an energy level of an audio signal, event data, time data, and/or user identification.

Abstract: A data storage service stores a dataset on a set of storage nodes in accordance with a first encoding. A set of shards constituting quorum, and one or more additional shards, are stored on the storage nodes. The data storage system determines to store the dataset according to a second encoding, in which the second encoding has a greater number of shards. The data storage system reconfigures the storage of the dataset in accordance with the second encoding, such that the reconfigured storage forms additional shards for the second encoding by combining portions of shards of the first encoding.

Abstract: A provider network determines which servers to use to host a group of virtual machines for a customer. A placement manager within the provider network employs a placement technique which prioritizes spreading virtual machines for the customer across different “subzones.” A subzone is a logical division of a provider network's hardware and/or software denoting risk boundaries. By placing virtual machines in separate subzones, the customer's virtual machines and thus the task collectively performed by the virtual machines are less impacted by a failure within one of the subzones.

Abstract: A computing device executes an application that is configured to call a sharing service application programming interface (“API”) to create a sharing session via a sharing service. The application can call the sharing service API to utilize one or more methods exposed by the sharing service API to connect to the sharing service and initiated the creation of the sharing session. The computing device can join the sharing session with one or more other computing devices. The computing device can receive data via the sharing session from one or more of the other computing devices. The data can include screen data and/or application data.

Abstract: Methods, systems, and computer-readable media for job scheduling based on job execution history are disclosed. A request is received to schedule a workload comprising a plurality of jobs. A resource allocation score for the workload is determined. The resource allocation score represents (at least in part) an estimated likelihood of successful execution of the workload. A first portion of the workload is scheduled for execution, and a remaining portion (if any) of the workload is delayed. A quantity of jobs in the first portion of the workload is determined based (at least in part) on the resource allocation score. Execution of the first portion of the workload is initiated.

Abstract: Systems and methods are provided for managing a conference call with multiple voice-enabled and voice-capturing devices, such as smart speakers. Reproduced, duplicate voice commands can cause unexpected results in a conference call. The voice commands can be determined to be received from the same conference call. A voice command for a particular voice-enabled device can be selected based on an energy level of an audio signal, event data, time data, and/or user identification.