Abstract: Systems and methods for providing access to a remote network via an external endpoint are provided. A client establishes a secure connection between an external endpoint and a remote network. Transmissions from clients to the external endpoint are supplemented with additional information regarding handling within the remote network, and then transmitted to an internal endpoint within the remote network. The internal endpoint processes the transmission based on the supplemental information and returns a response to the external endpoint. A response is then returned to the client. Access policies may be created by authorized users to establish processing of client transmissions. These policies may be stored and enforced by the internal endpoint or the external endpoint.

Abstract: A query optimizer may receive a query block that includes a hint. The hint may include a unique object identifier to specify an object to which the hint applies. In some instances, the object may correspond to a nested query block. A query optimization plan may be determined based, at least in part, on the hint. The query execution plan may then be executed to query a data store.

Abstract: Disclosed are various embodiments for hover activation based on movement by an input device pointer. A first panel in a user interface is rendered for display, the first panel comprising a plurality of elements. A second panel in the user interface is rendered for display according to the input device pointer hovering over an element among the plurality of elements in the first panel. A triangular region is identified according to a distance traversed by the input device pointer. The user interface is modified according to a delay and a current position of the input device pointer, wherein the current position is determined from the distance traversed by the input device pointer.

Abstract: A customer of a computing resource service provider may use an interface to access a graphical composer and generate one or more graphical representations of applications that may be provided to a variety of users of the customer's one or more resources. Once the customer has created a graphical representation of an application, a domain specific language model based at least on the graphical representation of the application may be created such that one or more simulations may be performed to determine whether the requested application includes any errors or conflicts. If the one or more simulations result in the application including no errors or conflicts, the domain specific language model may be compiled in an executable programming language to create the application. The application may then be provided to users who may utilize devices capable of understanding the executable programming language to install the application.

Abstract: A graphic session coordinator is established to enable remote virtualized graphics operations on behalf of a set of graphics request generators. A request generator submits a graphics session request to the session coordinator. A configuration operation is performed at one or more routing devices to enable graphics operation request packets from the request generator to be delivered to a first remote virtualized graphics device and to enable graphics operation response packets to be transmitted to a destination.

Abstract: A database engine may maintain a collection of data on a first storage device. A workflow manager node may receive a request to bulk load data into the collection. The workflow manager may instruct a control plane node to allocate and configure a secondary database node and to make operable thereon a second database using a second storage device. Data may be bulk loaded to the second storage device using a schema and storage unit format compatible with the collection of data. Storage units from the second storage device may be transferred to the first storage device and integrated into the collection of data.

Abstract: Disclosed herein are techniques for monitoring the performance of a storage-class memory (SCM). In some embodiments, a performance monitoring circuit at an interface between the SCM and a memory controller of the SCM receives transaction commands from the memory controller to the SCM, measures statistics associated with the transaction commands, and determines a utilization rate of the SCM based on the statistics. Based on the determined utilization rate of the SCM, future transaction requests can be optimized to improve the utilization rate of the SCM.

Abstract: A distributed system may implement analyzing bit vectors for resource placement. Bit vectors may be maintained or generated for currently hosted resources in a distributed system according to placement criteria so that individual bit values of a bit vector indicate whether a corresponding one of the placement criteria is satisfied for the current placement of the resource. A resource may be identified for migration and a possible placement determined for the resource. A bit vector may be generated for the possible placement and compared with the bit vector for the current placement of the resource to determine whether the possible placement improves the placement of the resource with respect to the placement criteria.

Abstract: Erasure encoded fragments are generated by an erasure encoding scheme, represented by an erasure encoding matrix, operating on a data file. A new erasure encoded fragment may be generated from previously-generated erasure encoded fragments without reconstructing the original data file. Available and valid erasure encoded fragments are identified and a set of those fragments is selected. A composite encoding matrix is generated based upon the selected fragments and the fragment specified to be generated. The composite matrix is applied to the selected fragments to produce a plurality of partial sums. The partial sums are then combined to generate the specified fragment. The partial sums may be produced by different devices so as to distribute the computational workload and/or to reduce network traffic. The integrity of a generated fragment may be verified by generating the specified fragment twice, using two different sets of fragments, and then comparing the two results.

Abstract: Items within a data set can be redistributed to different partitions of a distributed data store according to modified hash values. A redistribution event may, in some embodiments, trigger the redistribution of a data set. Modified hash values for items in the data set may be generated according to a secondary hashing scheme to be used for identifying the location of a new partition to store the item instead of hash values based on current key values that identify a current partition that stores the item. Access can be provided to items based on the modified hash values to determine the new partition that stores the item after redistribution.

Abstract: A network-based data store maintaining storage volumes for file systems at storage clients may implement dynamic storage volume scaling. A scaling event may be detected according to a specified scaling policy for a storage volume maintained at a network-based data store that is mounted at a storage client and configured for a file system. In a least some embodiments, the scaling policy for the storage volume may be received from the storage client. In response to detecting the storage event, storage maintaining the storage volume may be modified according to the scaling policy to scale the storage volume. An indication of the scaling event may be sent to the storage client in order to update the file system at the storage client so that the file system may utilize the scaled storage volume.

Abstract: Disclosed herein are techniques for preventing or minimizing completion timeout errors on a computer device. An apparatus includes a processing logic circuit configured to perform transactions requested by a requester device, and a timeout prevention logic coupled to the processing logic circuit. The timeout prevention logic includes a timeout logic and a moderation logic. The timeout logic is configured to, when the processing logic circuit fails to complete a particular transaction requested by the requester device within a reconfigurable time period, generate a timeout event and complete the particular requested transaction. The moderation logic is configured to determine a number of timeout events generated by the timeout logic during a monitoring time period, and set the reconfigurable time period based on the number of timeout events generated by the timeout logic during the monitoring time period.

Abstract: Data, attributes, and metrics from unavailable resource hosts may be collected and used for cluster analysis in order to correlate the different hosts and group similar hosts into clusters. The clusters may be ranked based on the collected information and used to provide a simple way to identify shared failure modes among the unavailable hosts. By identifying the hosts of each cluster, shared failures can be corrected for large groups of hosts at the same time, enabling the hosts to return to operational states.

Abstract: Methods and systems for implementing a highly available distributed queue using replicated messages are disclosed. An enqueue request is received from a client at a particular queue host of a plurality of queue hosts. The enqueue request comprises a message and a replica count greater than one. One or more copies of a replication request are sent from the particular queue host to one or more additional queue hosts. The replication request comprises the message. The quantity of copies of the replication request is determined based at least in part on the replica count. An initial replica of the message is enqueued at the particular queue host. One or more additional replicas of the message are enqueued at the one or more additional queue hosts. A quantity of the one or more additional replicas is determined based at least in part on the replica count.

Abstract: A scheduler of a batch job management service determines that a set of resources a client is insufficient to execute one or more jobs. The scheduler prepares a multi-dimensional statistical representation of resource requirements of the jobs, and transmits it to a resource controller. The resource controller uses the multi-dimensional representation and resource usage state information to make resource allocation change decisions.

Abstract: Methods, systems, and computer-readable media for a development environment for programming quantum computing resources are disclosed. A development environment receives information associated with a quantum algorithm. A quantum computing resource is selected for implementation of the quantum algorithm based at least in part on one or more metrics analyzed by the development environment. The quantum computing resource comprises a plurality of quantum bits and is selected from a pool of computing resources of a provider network. A program executable on the quantum computing resource is generated based at least in part on the information associated with the quantum algorithm.

Abstract: A data storage service receives commands configured according to a communication protocol, such as a small computer system interface protocol. The commands may be replications of commands sent to a block-level data storage system, such as a storage area network. Data to be written by execution of the commands is persisted using an object-based data storage system. When read commands are received, data blocks can be extracted from the data objects in which they are stored.