Abstract: In one embodiment, a method receives current latency values from a plurality of host computers where a current latency value is calculated by a respective host computer based on an amount of time spent in the respective host computer's issue queue by an IO request most recently removed from the issue queue of the respective host computer. The issue queue of the respective host computer is used to transmit IO requests from the respective host computer to a storage system. The method then calculates a combined average latency value based on the current latency values and sends the combined average latency value to the plurality of host computers. Each respective host computer adjusts a size of the respective host computer's issue queue based on the combined average latency value, and the size controls a number of IO requests that are added to the respective host computer's issue queue.

Abstract: Application resource scheduler module is provided to achieve cooperative application workload scheduling for a consolidated virtual environment. The application resource scheduler aids an application workload scheduler that is part of a distributed computing application, such as Hadoop, to achieve a specified relative priority of the application workload virtual machines to other virtual machines in the virtual environment. The application resource scheduler assists in achieving cooperative workload scheduling by revising the amount of resources that the application workload scheduler sees as available and by setting resource controls for the virtual machines of the distributed computing application to influence the resources the virtual machines receive from the underlying consolidated virtual environment.

Abstract: A method for offloading decoding of encoded video data from a computer system executing a video player application playing the encoded video data to a remote display terminal still enables the video player application to overlay transparent or semi-transparent graphical elements, such elements, such as user interface controls, onto the video, despite not having access to decoded video data. A video decoding function call from the video player application is intercepted and replacement video data is provided to the video player application rather than a decoded version of the encoded video data. The video player application is thereby able to overlay graphical elements onto the replacement video data to create composite video from which the graphical elements are then able to be subsequently extracted and transmitted with the encoded video data to remote display terminal, which decodes the video data and overlays the graphical elements for display.

Abstract: In one embodiment, a method includes determining an instrumentation action to perform with the software program when a logging statement is encountered during execution of a software program. The instrumentation action is performed by an instrumentation service associated with a logging service and the execution of the software program is monitored based on the instrumentation action being performed.

Abstract: A method and a system of making a virtual machine space efficient are disclosed. The virtual machine includes a virtual disk. The method includes creating a temporary virtual disk and adding the temporary virtual disk to the virtual machine. The temporary virtual disk works in conjunction with the virtual disk. The virtual machine is configured to store temporary files in the temporary virtual disk rather than the virtual disk.

Abstract: Methods, systems, and computer programs for performing management tasks in a virtual infrastructure are presented. The method includes detecting a decrease, below a predetermined threshold, in a number of tasks waiting to be processed by a plurality of virtual centers (VCs) executing as virtual machines (VMs) in a virtual infrastructure, wherein each of the plurality of VCs is a management VM for the managed objects of the virtual infrastructure. The method further includes, based on the detected decrease in the number of tasks waiting to be processed, selecting one or more VCs of the plurality of VCs to be removed, distributing managed objects handled by the selected one or more VCs to one or more non-selected VCs of the plurality of VCs, and removing the selected one or more VCs.

Abstract: A cloud computing environment provides the ability to deploy a web application that has been developed using one of a plurality of application frameworks and is configured to execute within one of a plurality of runtime environments. The cloud computing environment receives the web application in a package compatible with the runtime environment and dynamically binds available services by appropriately inserting service provisioning data (e.g., service network address, login credentials, etc.) into the package. The cloud computing environment then packages an instance of the runtime environment, a start script and the package into a web application deployment package, which is then transmitted to an application (e.g., container virtual machine, etc.).

Abstract: A virtual machine system decouples dynamic program analysis from program execution. Program analysis is decoupled from program execution through the use of a virtual machine to record program execution and an analysis platform to replay and analyze the program execution. Optimization techniques are applied to prevent the analysis platform from falling too far behind the program execution platform during replay.

Abstract: A shared input/output (IO) resource is managed in a decentralized manner. Each of multiple hosts having IO access to the shared resource, computes an average latency value that is normalized with respect to average IO request sizes, and stores the computed normalized latency value for later use. The normalized latency values thus computed and stored may be used for a variety of different applications, including enforcing a quality of service (QoS) policy that is applied to the hosts, detecting a condition known as an anomaly where a host that is not bound by a QoS policy accesses the shared resource at a rate that impacts the level of service received by the plurality of hosts that are bound by the QoS policy, and migration of workloads between storage arrays to achieve load balancing across the storage arrays.

Abstract: In a virtualized system using memory page sharing, a method is provided for maintaining sharing when Guest code attempts to write to the shared memory. In one embodiment, virtualization logic uses a pattern matcher to recognize and intercept page zeroing code in the Guest OS. When the page zeroing code is about to run against a page that is already zeroed, i.e., contains all zeros, and is being shared, the memory writes in the page zeroing code have no effect. The virtualization logic skips over the writes, providing an appearance that the Guest OS page zeroing code has run to completion but without performing any of the writes that would have caused a loss of page sharing. The pattern matcher can be part of a binary translator that inspects code before it executes.

Abstract: A component manages and minimizes latency introduced by virtualization. The virtualization component determines that a currently scheduled guest process has executed functionality responsive to which the virtualization component is to execute a virtualization based operation, wherein the virtualization based operation is one that is not visible to the guest operating system. The virtualization component causes the guest operating system to de-schedule the currently scheduled guest process and schedule at least one separate guest process. The virtualization component then executes the virtualization based operation concurrently with the execution of the at least one separate guest process. Responsive to completing the execution of the virtualization based operation, the virtualization component causes the guest operating system to re-schedule the de-scheduled guest process.

Abstract: A method of direct access by a virtual machine (VM) running on a host machine to physical storage via a virtual function (VF) running on an input/output (IO) adapter comprising: providing by a virtualization intermediary running on the host machine an indication of an active path associated with a virtual storage device; obtaining by a guest driver running within a guest operating system of the VM the stored indication of the active path from the shared memory region; dispatching an IO request by the guest driver to the VF that includes an indication of the active path; and sending by the VF an IO request that includes the indicated active path.

Abstract: Systems and methods are disclosed that allow for transparently recovering from an uncorrected multi-bit error of arbitrary length located at a memory address. Storing one or more parity pages, for a set of pages in system memory, such that a page in the set of pages may be reconstructed using one of the parity pages is disclosed. Storing an indication of one or more page's disk location such that the one or more pages may be reconstructed by refilling the page from disk is also disclosed.

Abstract: A system and related method of operation for migrating the memory of a virtual machine from one NUMA node to another. Once the VM is migrated to a new node, migration of memory pages is performed while giving priority to the most utilized pages, so that access to these pages becomes local as soon as possible. Various heuristics are described to enable different implementations for different situations or scenarios.

Abstract: In one embodiment, a method displays images from a remote desktop of a desktop GUI on a client device. The method receives a plurality of image blocks for a frame update of an image of the desktop GUI being displayed on the client device. The remote desktop is being run on a host. The client device determines that one or more missing image blocks have not been received for the frame update and determines if the frame update should be performed without the one or more missing image blocks. If the frame update of the desktop GUI should be performed without the one or more missing image blocks, the client device performs the frame update of the desktop GUI using the plurality of image blocks without using the one or more missing image blocks.

Abstract: Systems and methods described herein facilitate determining desktop readiness using interactive measures. A host is in communication with a server and the host includes a virtual desktop and a virtual desktop agent. The virtual desktop agent is configured to perform one or more injecting events via one or more monitoring agents, wherein each of the injecting events is a simulated input device event. The desktop agent is further configured to receive, via a display module, a response to the injecting event(s), wherein the response is a display update causing pixel color values for the display module to alter. The desktop agent is also configured to identify, via the monitoring agent(s), whether the response to the injecting event(s) is an expected response. The desktop agent is also configured to determine, via the monitoring agent(s), a readiness of the virtual desktop based on the expected response.

Abstract: In one embodiment, a method determines a first set of virtual machines and a second set of virtual machines. The first set of virtual machines is associated with a first priority level and the second set of virtual machines is associated with a second priority level. A first set of computing resources and a second set of computing resources are associated with hosts. Upon determining a failure of a host, the method performs: generating a power off request for one or more of the second set of virtual machines powered on the second set of computing resources and generating a power on request for one or more virtual machines from the first set of virtual machines that were powered on the failed host, the power on request powering on the one or more virtual machines from the first set of virtual machines on the second set of computing resources.

Abstract: Multiple servers sharing a distributed file system are used to perform copies of regions of a source file in parallel from a source storage unit to corresponding temporary files at a destination storage unit. These temporary files are then merged or combined into a single file at the destination storage unit in a way that preserves the inode structure and attributes of the source file. A substantial speedup is obtained by copying regions of the file in parallel.

Abstract: To generate a checkpoint for a virtual machine (VM), first, while the VM is still running, a copy-on-write (COW) disk file is created pointing to a parent disk file that the VM is using. Next, the VM is stopped, the VM's memory is marked COW, the device state of the VM is saved to memory, the VM is switched to use the COW disk file, and the VM begins running again for substantially the remainder of the checkpoint generation. Next, the device state that was stored in memory and the unmodified VM memory pages are saved to a checkpoint file. Also, a copy may be made of the parent disk file for retention as part of the checkpoint, or the original parent disk file may be retained as part of the checkpoint. If a copy of the parent disk file was made, then the COW disk file may be committed to the original parent disk file.

Abstract: Techniques are disclosed for a management application running on a virtualization management platform and a module on a virtual machine host to communicate via an opaque pass-through channel for transporting data through the management platform and intermediate layer(s) of the virtual machine host between the management application and the module. In one embodiment, the data is identified by a key which is unique across management applications and includes a namespace registered by the management application on the management platform and registered by the module on the virtual machine host. In another embodiment, the namespace may indicate an association of the data with one or more entities such as a distributed virtual switch, port groups, ports, and virtual machine hosts. Configuration property settings for an entity may be propagated to its sub-entities based on inheritance. Further, the data may be persisted in database(s) of the management platform and/or the intermediate layer(s).