Abstract: Testing execution of workloads in a computing system is provided. The testing includes: providing a definition of one or more workloads for each one of a plurality of users of the computing system, mapping each production computing machine of each test workload on a staging computing machine of a staging environment common to the users, mirroring the production computing machine, executing each work unit of each test workload on the corresponding staging computing machine, and determining a test result of an execution of each test workload according to an execution result of one or more executions of the work units of the test workload.

Abstract: A method, system, and apparatus are provided for accelerated atomic resource allocation on a multiprocessor platform. In particular, a resource allocation engine (RAE) performs the following: counting available units for each of the one or more resources; parsing a multi-resource ticket (MRT) for a processor, wherein the parsing identifies one or more requested resource types, each resource type being paired with a requested resource units; comparing the multi-resource ticket to one or more resource queues for the requested resource types, wherein the comparing determines an availability status of at least one the requested resource types; and based on the availability status, calculating whether or not all of the requested resource types can be allocated for the processor, wherein the calculating is completed before allocating a next requested resource for a next processor.

Abstract: A computer manages methods for determining workload placement in a computing environment. The computer receives a plurality of workloads with associated information, wherein the associated information for each workload contains at least: contract information, billing information, and resource availability information. The computer determines a profitability factor for each workload of the plurality of workloads, wherein the profitability factor is at least based on the billing information. The computer determines a penalty factor for each workload of the plurality of workloads, wherein the penalty factor is at least based on the contract information. The computer determines a preference factor for each workload of the plurality of workloads, wherein the preference factor is at least based on the resource availability information. The computer assigns a priority ordering for each of the workloads from the plurality of workloads.

Abstract: Converting a hybrid flow can include combining each of a plurality of task nodes with a plurality of corresponding operators of the hybrid flow and converting the combined plurality of task nodes and the plurality of corresponding operators of the hybrid flow to a data flow graph using a code template.

Abstract: A method includes tracking, for each of a plurality of workloads, a wear rate incurred by a component of a given component type as a result of processing an instance of the workload on a compute node that includes the component. The method further comprises determining a remaining lifespan for a plurality of components in a plurality of compute nodes, and identifying a component from among the plurality of components having a remaining lifespan of less than a first threshold amount. Sill further, the method comprises identifying an instance of one of the workloads that needs processing and has a wear rate greater than a second threshold amount, and processing the identified workload instance on the identified component.

Abstract: A technology is described for a load time updatable driver. An example method may include presenting a driver interface to a computing instance launched in a computing service environment that enables the computing instance to interact with a virtualized resource, where the driver interface is an interface to driver functionality that enables the computing instance to interact with the virtualized resource via a hypervisor. Context information for the computing instance may be obtained and the context information may be used to identify a driver image for the virtualized resource that enables the computing instance to interact with the virtualized resource. The driver image for the virtualized resource may be obtained and the driver image may be loaded into computer memory and registered with the driver interface.

Abstract: An electronic device can be used for synchronizing tasks of an appliance that includes a memory access controller having inputs associated with priority levels. The device includes control circuits configured for receiving signals from events and delivering in response signals for activation of tasks. A configurable interface for external events designed to receive first event signals from at least one circuit of the appliance and to route some of them to the corresponding control circuits as a function of a first law of correspondence. A configurable interface for internal events designed to receive second event signals corresponding to the signals for activation of tasks and to route some of them to the control circuits as a function of a second law of correspondence.

Abstract: An example method of providing memory deduplication protection for one or more memory pages includes inserting an identifier of a first memory page into a list of memory pages for which memory deduplication is avoided. The first memory page is located in a virtual address space allocated to a memory consumer. The method also includes determining whether to deduplicate a second memory page. The method further includes determining whether an identifier of the second memory page is included in the list of memory pages. The method also includes in response to determining that the identifier of the second memory page is included in the list of memory pages, determining that the second memory page should not be deduplicated to provide memory deduplication protection for the second memory page.

Abstract: Some embodiments provide a method for securing a managed forwarding element (MFE) that operates in a data compute node (DCN) executing in a host machine. The method receives a notification that the MFE is loaded on the DCN. The MFE is for implementing a set of logical forwarding elements of a logical network that logically connects the DCN to several other DCNs. The method secures the MFE by isolating, in a physical memory of the host machine, executable code and data of the MFE from executable code and data of other applications that execute in the DCN.

Abstract: A streams manager monitors performance of parallel portions of a streaming application implemented in multiple virtual machines (VMs). When the performance provided by the multiple VMs is no longer needed, one or more of the VMs can be torn down. The performance of the VMs is monitored. When the least performing VM can be torn down, it is torn down. When the least performing VM cannot be torn down, information regarding a better performing VM is gathered, and it is determined whether the least performing VM can be made more similar to the better performing VM. When the least performing VM can be made more similar to the better performing VM, the least performing VM is changed to improve its performance, and the better performing VM is torn down.

Abstract: A computer system receives a first instruction identifier identifying a first instruction being executed by a first thread associated with a first virtual machine and receives a second instruction identifier identifying a second instruction being executed by a second thread associated with the first virtual machine. The system produces an execution record comprising the first instruction identifier, a first thread identifier identifying the first thread, a first timestamp reflecting a first real-time clock value associated with executing the first instruction, the second instruction identifier, a second thread identifier identifying the second thread, and a second timestamp reflecting a second real-time clock value associated with executing the second instruction.

Abstract: Provided herein is a system and method for providing a virtual desktop service using a cache server, the system including a host server configured to provide the virtual desktop service to a user's device using a virtual machine, a distributed file system configured to store data for the virtual machine, and a cache server configured to, when a request to process data reading is received from the virtual machine inside the host server, pre-read a data segment for the requested process of data reading from the distributed file system and store the pre-read data segment in a cache, and perform the process of data reading using the cache.

Abstract: A method, system and computer readable media for managing virtual appliances are provided. The method includes discovering each of a plurality of components of an enterprise solution, the enterprise solution encompassing a plurality of virtual appliances and relationships among the plurality of virtual appliances. Each of the plurality of virtual appliances has one or more virtual machines, and the plurality of virtual appliances are implemented in a physical computing environment. The method includes reconfiguring the plurality of components in response to a change in a configuration of one or more of the plurality of components.

Abstract: Many storage devices (or drives) include a mechanism, such as a processor, to execute internal maintenance process(es) that maintain data integrity and long-term drive health. One example of such an internal maintenance process is a background media scan (BMS). However, on busy systems, the BMS may not have an opportunity to execute, which can damage long term drive performance. In one embodiment, a method includes sending a command from a host device to a storage device. The storage device can responsively run an internal maintenance process of the storage device. In one embodiment, the internal maintenance process can be an internal maintenance process such as a background media scan.

Abstract: A host machine may host a virtual machine. Virtual machine reboot information, used to reboot the virtual machine in the event of a failure or restart of the virtual machine, may be identified (e.g., file system metadata buffers, a virtual non-volatile random access memory log, user data buffers, and/or data used to reboot the virtual machine such as to perform a reboot mounting operation and/or a reboot replay operation of a volume of data associated with the virtual machine). The virtual machine reboot information may be cached within relatively fast host memory of the host machine (e.g., instead of merely within a relatively slower hard drive or other storage device). In this way, the cached virtual machine reboot information may be quickly retrieved so that the virtual machine may be rebooted in a relatively shorter amount of time.

Abstract: Migration of a virtual machine from a source host computing system to a target host computing system in a context in which a centralized portion of virtual machine state is maintained in a storage that is accessible to both the source host computing system and the target host computing system, and a localized portion of the virtual machine state is maintained in local storage of the source host computing system. For instance, the centralized portion of the virtual machine state might be user data, and the localized portion might be backing files for the virtual machine. In order to support the potential migration, at least a portion of the localized portion of the virtual machine state are backed up to a storage that is accessible to both the source and target host computing systems.

Abstract: A method includes (a) receiving a setup command directing a computing device to create a protocol endpoint to allow a remote host device to access storage volumes of the computing device presented to the remote host through the protocol endpoint as virtual storage volumes, (b) in response to receiving the setup command, creating a logical storage device object representing the protocol endpoint, the logical storage device object having zero underlying storage capacity, (c) subsequent to creating the logical storage device object, receiving a command directed at the protocol endpoint, and (d) in response to receiving the command, processing the command by a driver stack on the computing device containing the logical storage device object representing the protocol endpoint, the driver stack being shorter than another driver stack on the computing device used to process storage commands directed at another logical storage device object having non-zero underlying storage.

Abstract: An application such as a virtual machine are executed securely using a software-based, full-system emulator within a hardware-protected enclave, such as an SGX enclave. The emulator may thereby be secure even against a malicious underlying host operating system. In some cases, paging is used to allow even a large application may run within a small enclave using paging. Where the application itself uses enclaves, these guest enclaves may themselves be emulated within an emulator enclave such that the guest enclave(s) are nested as sibling enclaves by the emulator.

Abstract: In one embodiment, a system for managing communication connections in a virtualization environment, comprises a plurality of host machines implementing a virtualization environment, wherein each of the host machines comprises a hypervisor, at least one user virtual machine (UVM), a connection agent, and an I/O controller; and a virtual disk comprising a plurality of storage devices, the virtual disk being accessible by all of the I/O controllers, wherein the I/O controllers conduct I/O transactions with the virtual disk based on I/O requests received from the UVMs, and wherein, for each of the host machines: each of the UVMs on the host machine sends its respective I/O requests to a selected one of the I/O controllers, and for each of the UVMs on the host machine, the connection agent on the host machine selected one of the I/O controllers for the UVM based on a list of the available I/O controllers.

Abstract: Examples perform live migration of objects such as VMs from a source host to a destination host. The disclosure exposes the contents of the storage disk at the destination host, compares the storage disk of the destination host to the source host, and during migration, migrates only data which is not already stored at the destination host. The source and destination VMs have concurrent access to storage disks during migration. After migration, the destination VM executes, with exclusive access to the storage disks.