Described embodiments provide systems and methods for detection of the degradation of a virtual desktop environment. A computing device may receive data from a plurality of client devices. The computing device may identify a subset of client devices from the plurality of client devices with at least one characteristic in common based on the received data. The computing device may determine a ratio of the identified subset of client devices, the ratio being a comparison of client devices of the subset with a value above a first threshold to a total number of client devices of the subset, and the value being indicative of a characteristic of performance for that client device. The computing device may identify a cause of an anomaly in the performance of the application based on the ratio exceeding a second threshold.

Described herein is a method, system, and non-transitory computer readable medium for helping customers in accessing data through an application from a replica database, detecting whether the replica database, zone of availability of the replica database, or geographical region encompassing the zone of availability is experiencing an outage or other failure, and re-routing traffic to a backup replica database accordingly. To assess the status of the database, metrics are pushed in a secure manner from a private subnet to a public-facing monitoring agent, achieving a clear segregation of private subnet and public facing components. Further, circuit-breaker logic is included for preventing failure during updating DNS addresses during the re-routing process.

A technique involves, in response to encountering a predefined number of consecutive I/O errors using a drive path to a storage drive, transitioning the drive path from online to quarantined to temporarily deny further I/O operations from being processed using the drive path. The technique further involves starting a quarantine timer that defines a quarantine time period. The technique further involves performing an update operation that updates the drive path. The update operation (i) changes the drive path from quarantined to removed to continue denying further I/O operations from being processed using the drive path when a removal notification is received before the quarantine time period expires, and (ii) changes the drive path from quarantined to back to online to allow further I/O operations to be processed using the drive path when a removal notification is not received before the quarantine time period expires.

Techniques are provided for path management and failure prediction in a multipath environment using target port power levels. One method comprises obtaining, by a first entity that communicates with a second entity via multiple paths, a transmit power level and/or a receive power level of a target port associated with the second entity; evaluating the transmit power level and/or the receive power level of the target port relative to a threshold; and setting, by the first entity, a path state of one or more paths between the first entity and the target port to a standby state based on the evaluating, wherein the first entity establishes paths between the first entity and one or more other target ports of the second entity in an active state. Existing communications on the one or more paths between the first entity and the target port may be allowed to complete in the standby state.

A server system comprising storage devices, processing devices and a storage fabric all operating according to a storage fabric protocol. The storage fabric comprises a plurality of individual switches having a modular design from which an overall switch is built, and the individual switches have individual respective configuration settings which determine which processing devices are allocated to use which of the storage devices. The system comprises an API enabling a software control function to configure the overall switch. The API is operable to receive from the control function an overall mapping of the storage devices to the processing devices instead of requiring the individual configuration settings of each of the individual switches to be specified by the control function, the API being configured to convert the overall mapping into the individual configuration settings of the individual switches to produce the overall mapping.

Embodiments of the present invention provide systems and methods for recovering a high availability storage system. The storage system includes a first layer and a second layer, each layer including a controller board, a router board, and storage elements. When a component of a layer fails, the storage system continues to function in the presence of a single failure of any component, up to two storage element failures in either layer, or a single power supply failure. While a component is down, the storage system will run in a degraded mode. The passive zone is not serving input/output requests, but is continuously updating its state in dynamic random access memory to enable failover within a short period of time using the layer that is fully operational. When the issue with the failed zone is corrected, a failback procedure brings the system back to a normal operating state.

Migrating a source volume from a source appliance to a destination appliance, wherein the source volume is assigned to an asymmetric namespace access (ANA) group and initially exposed to a host computer as accessible at the source appliance, includes creating a destination volume on the destination appliance and expanding the ANA group to include the destination volume, with the ANA group initially exposing the destination volume as inaccessible to the host computer at the destination appliance. Subsequently, the destination volume is synchronized to the source volume and then a cutover is performed that includes (i) copying volume metadata including host reservations from the source volume to the destination volume, and (ii) changing the ANA group to expose the source volume as inaccessible at the source appliance and the destination volume as accessible at the destination appliance.

Some embodiments provide a three-dimensional (3D) circuit structure that has two or more vertically stacked bonded layers with a machine-trained network on at least one bonded layer. As described above, each bonded layer can be an IC die or an IC wafer in some embodiments with different embodiments encompassing different combinations of wafers and dies for the different bonded layers. The machine-trained network in some embodiments includes several stages of machine-trained processing nodes with routing fabric that supplies the outputs of earlier stage nodes to drive the inputs of later stage nodes. In some embodiments, the machine-trained network is a neural network and the processing nodes are neurons of the neural network. In some embodiments, one or more parameters associated with each processing node (e.g., each neuron) is defined through machine-trained processes that define the values of these parameters in order to allow the machine-trained network (e.g., neural network) to perform particular operations (e.g., face recognition, voice recognition, etc.). For example, in some embodiments, the machine-trained parameters are weight values that are used to aggregate (e.g., to sum) several output values of several earlier stage processing nodes to produce an input value for a later stage processing node.

A method of reconfiguring an addressing mechanism in a system-on-chip comprising system circuitry and monitoring circuitry having tree-structured units for routing communications through the system, includes sending a discovery message, receiving discovery responses from the units, each discovery response identifying the number of individually addressable entities in that unit and those units in the branch above that unit; in response to not receiving a response from one or more units, determining that one of those units is defective; enabling a crosslink between a first unit in the same branch as the defective unit and a second unit in an adjacent branch; sending a further discovery message; receiving a further discovery response from the second unit identifying the number of individually addressable entities in that second unit, those units in the branch above that second unit, the first unit, and those units in the branch above the first unit; and reconfiguring the address of the crosslink so as to cause a subsequent communication to an individually addressable entity in the defective unit's branch to be routed via the adjacent branch and the crosslink, thereby bypassing the defective unit.

Methods, apparatus, systems, and articles of manufacture are disclosed to increase resiliency in self-healing mechanisms. At least one non-transitory machine-readable medium comprises instructions that, when executed, cause at least one processor to at least partition computational resources of a first host into a primary partition and a shadow partition, the primary partition to communicate with a second host, apply a fix for the primary partition, determine if the primary partition can communicate with the second host during the application of the fix, cause, in response to the determination that the primary partition cannot communicate with the second host during the application of the fix, the shadow partition to communicate with the second host; and transfer communication with the second host from the shadow partition to the primary partition, the transfer in response to a determination that the application of the fix is complete.