Abstract: Method and apparatus for determining feature unavailability are disclosed. In the method and apparatus a user device attempts to communicate with a second server over a second network path whereby the communication may be blocked. The user device receives data from a first server over a first network path whereby the data indicates that communication using the second network path may be blocked.

Abstract: Techniques for providing user specific content may be provided. In some examples, a method may be provided for receiving a request for content that is configured to be revised with user content associated with a user. In some examples, a user profile that indicates a perceptual orientation of the user is determined based at least in part on user-initiated activity. A data object associated with the user's perceptual orientation may be generated based at least in part on the determined user profile. Further, in some examples, the content may be revised to at least include the data object and provided.

Abstract: Methods and systems for implementing network-aware caching are disclosed. Respective performance characteristics are determined for accessing a plurality of storage locations from a client computing device. The storage locations comprise one or more shared network-access storage locations accessible to the client computing device over a network and optionally one or more dedicated storage locations of the client computing device. One of the storage locations is selected for storing data to which access is requested by the client computing device. The selected storage location is determined based on the respective performance characteristics of the storage locations. The data is cached in the selected storage location.

Abstract: Methods and systems for implementing a network-backed file system are disclosed. Data indicative of a plurality of subscriptions by a plurality of clients to respective subsections of a file system is stored. The subscriptions comprise one or more read subscriptions and one or more write subscriptions. The read subscriptions are fulfilled by sending modified file chunks of subsections to subscribing clients. The write subscriptions are fulfilled by modifying file chunks of subsections based on write requests submitted by subscribing clients.

Abstract: Methods and systems for implementing client selection in a distributed strict queue are disclosed. A plurality of messages are distributed to a plurality of queue servers based on strict order parameters for the messages. Messages that share a value for the strict order parameter are distributed to the same queue server. The messages are enqueued at the queue servers. Messages that share a value for the strict order parameter are enqueued in a strict order based on the time of receipt at the queue server. One or more queue clients are selected to process the enqueued messages. The queue clients are selected based on their message processing capability along with the message processing throughput for values for the strict order parameter.

Abstract: Methods and systems for implementing client isolation in a distributed queue are disclosed. Messages are enqueued in one or more logical queues. Individual messages comprise respective values for an isolation parameter. A respective value for the isolation parameter is assigned to individual queue clients. Messages are sent to the queue clients based at least in part on the values for the isolation parameter. The queue clients are configured to attempt message processing for the messages. Messages having different values for the isolation parameter are isolated among different queue clients.

Abstract: Method and apparatus for determining feature unavailability are disclosed. In the method and apparatus a user device attempts to communicate with a second server over a second network path whereby the communication may be blocked. The user device receives data from a first server over a first network path whereby the data indicates that communication using the second network path may be blocked.

Abstract: Method and apparatus for determining feature unavailability are disclosed. In the method and apparatus a user device attempts to communicate with a second server over a second network path whereby the communication may be blocked. The user device receives data from a first server over a first network path whereby the data indicates that communication using the second network path may be blocked.

Abstract: Techniques for providing a recommendation for an item may be provided. In particular, a system can provide a recommendation for one or more items based at least in part on how easily a system can fulfill the recommended item. The ease of fulfillment may be affected by one or more items selected or selected by the user, so that when two potential items can be recommended for the user, the item that is easier to provide to the user with the selected item can receive a better recommendation by the system (e.g., through a ranked or scored recommendation list, by limiting the recommended items provided to a user).

Abstract: Methods and systems for implementing a pre-processing and processing pipeline for a queue client are disclosed. A queue client receives, from a queue service, data indicative of an estimated time to process a first message in a queue. The queue client initiates processing of the first message. The queue client receives, from the queue service, data indicative of an estimated time to pre-process a second message in the queue. The queue client initiates pre-processing of the second message during the processing of the first message. The pre-processing of the second message is scheduled based on the estimated time to process the first message and the estimated time to pre-process the second message.

Abstract: Techniques for providing user specific content may be provided. In some examples, a method may be provided for receiving a request for content that is configured to be revised with user content associated with a user. In some examples, a user profile that indicates a perceptual orientation of the user is determined based at least in part on user-initiated activity. A data object associated with the user's perceptual orientation may be generated based at least in part on the determined user profile. Further, in some examples, the content may be revised to at least include the data object and provided.

Abstract: Methods and systems for implementing client selection in a distributed strict queue are disclosed. A plurality of messages are distributed to a plurality of queue servers based on strict order parameters for the messages. Messages that share a value for the strict order parameter are distributed to the same queue server. The messages are enqueued at the queue servers. Messages that share a value for the strict order parameter are enqueued in a strict order based on the time of receipt at the queue server. One or more queue clients are selected to process the enqueued messages. The queue clients are selected based on their message processing capability along with the message processing throughput for values for the strict order parameter.

Abstract: Methods and systems for implementing strict queue ordering in a distributed system are disclosed. A plurality of messages are distributed to a plurality of queue servers based on strict order parameters for the messages. Messages that share a strict order parameter are distributed to a respective one of the queue servers. Sequence identifiers are assigned to the plurality of messages at the queue servers. Each sequence identifier indicates a respective position in a message sequence for a corresponding one of the strict order parameters. The respective position is based on a time of receipt at the queue server. The plurality of messages are enqueued based on the sequence identifiers.

Abstract: Methods and systems for implementing message batching in a distributed strict queue are disclosed. A plurality of messages are distributed to a plurality of queue servers based on strict order parameters for the messages. Messages that share a value for the strict order parameter are distributed to the same queue server. The messages are enqueued at the queue servers. Messages that share a value for the strict order parameter are enqueued in a strict order based on the time of receipt at the queue server. A batch comprising individual messages is sent to a queue client. The messages that share a value for the strict order parameter are batched in the strict order.

Abstract: Methods and systems for implementing failure management in a distributed strict queue are disclosed. A plurality of messages are distributed to a plurality of queue servers based on strict order parameters for the messages. Messages that share a value for the strict order parameter are distributed to the same queue server. The messages are enqueued at the queue servers. Messages that share a value for the strict order parameter are enqueued in a strict order based on the time of receipt at the queue server. One or more queue clients are configured to attempt message processing for the enqueued messages. Log data is received from the one or more queue clients at the queue servers. The log data is descriptive of the attempted message processing.

Abstract: Methods and systems for implementing message inspection in a distributed strict queue are disclosed. A plurality of messages are inspected. Based on the inspecting, individual messages are classified for regular processing or for other processing. The messages classified for regular processing are distributed to queue servers based on their values for a strict order parameter; messages that share a value are distributed to the same queue server. The messages classified for regular processing are enqueued at the queue servers. Messages that share a value for the strict order parameter are enqueued in a strict order based on the time of receipt at the queue server. One or more other actions are performed for the messages classified for other processing.

Abstract: Methods and systems for implementing geographic awareness in a distributed strict queue are disclosed. A plurality of queue servers are selected to receive a plurality of messages from a plurality of queue producers. The queue servers are selected from a pool of available queue servers to optimize the performance of a distributed strict queue system. The plurality of messages are distributed to the queue servers based on strict order parameters for the messages. Messages that share a value for the strict order parameter are distributed to the same queue server. The messages are enqueued at the queue servers. Messages that share a value for the strict order parameter are enqueued in a strict order based on the time of receipt at the queue server.

Abstract: Methods and systems for implementing input/output management in a distributed strict queue are disclosed. A plurality of messages are distributed to a plurality of queue servers based on strict order parameters for the messages. Messages that share a value for the strict order parameter are distributed to the same queue server. The messages are enqueued at the queue servers. Messages that share a value for the strict order parameter are enqueued in a strict order based on the time of receipt at the queue server. One or more queue clients are configured to attempt message processing for the enqueued messages. Network interactions between the queue clients and one or more external components are configured to be routed through a network proxy.

Abstract: Methods and systems for implementing client control in a distributed strict queue are disclosed. A plurality of messages are distributed to a plurality of queue servers based on strict order parameters for the messages. Messages that share a value for the strict order parameter are distributed to the same queue server. The messages are enqueued at the queue servers. Messages that share a value for the strict order parameter are enqueued in a strict order based on the time of receipt at the queue server. A control message is sent from the queue servers to one or more queue clients. The control message causes modification of a configuration at the queue clients. The queue clients are configured to process the messages based on the configurations.

Abstract: Methods and systems for implementing multi-tiered processing in a distributed strict queue are disclosed. Original messages are dequeued from a first set of queues using a first layer of queue clients, each of which transforms a subset of the original messages into a transformed message and enqueues the transformed message into a second set of queues. The transformed messages are dequeued from the second set of queues using a second layer of queue clients, each of which summarizes a subset of the transformed messages into a summarized message and enqueues the summarized message into a third set of queues. The summarized messages are dequeued from the third set of queues using a third layer of queue clients, each of which aggregates a subset of the transformed messages into an aggregated message. A final result is generated based on the aggregated messages.