Citrix Systems, Inc.

Stratus Technologies Bermuda Ltd.

Simon P Graham

Jeffrey S Somers

Daniel J Lussier

Moso Lee

Steven Michael Haid

John W Edwards, Jr

Graham Macdonald

John Baboval

Yuhua Lu

Dan Lussier

Thomas Goetz

Timothy Wegner

Laurent Fournie

Tim Wegner

Mark Roddy

A virtual disk is provided to a computing environment. The virtual disk includes identity information to enable identification of a virtual machine within the computing environment. A size of the virtual disk is increased within the computing environment to enable the virtual disk to act as a storage for the identity information and as a cache of other system data to operate the virtual machine. The virtual machine is booted within the computing environment. The virtual machine is configured to at least access the virtual disk that includes both identity information and caches other system data to operate the virtual machine. Related apparatus, systems, techniques and articles are also described.

Provisioning virtual machines with a single identity and cache virtual disk

A computer system is provided. The computer system includes a memory and at least one processor coupled to the memory. The processor is configured to identify a message to a plug and play (PnP) manager of an operating system, the message comprising an identifier of a device to be configured by the PnP manager, determine whether the device is targeted for device identifier translation at least in part by determining whether the device satisfies one or more target device criteria, and replace the identifier of the device with a reference identifier different from the identifier of the device in response to a determination that the device is targeted for device identifier translation, the reference identifier being usable by the PnP manager to install or configure the device.

Device identifier translation systems and methods

A computing system includes a server to stream a base disk image over a communications network, and a client machine. The client machine includes a read cache to store preboot data including a network driver, and a processor coupled to the read cache. The processor initiates prebooting of the client machine using the preboot data, and after the network driver is running, receives the streamed base disk image from the server via the communications network to continue booting the client machine.

Provisioning services (PVS) cloud streaming with read cache file storing preboot data including a network driver

Systems and methods for operating a cloud based computing system. The methods comprise: receiving, by a cloud server, a request for accessing Virtual Hard Disk ('VHD') data associated with a first location in the VHD of a Virtual Machine ('VM') hosted by a remote computing device; extracting, by the cloud server, at least a first address specifying the first location from the request; translating, by the cloud server, the first address into a second address specifying a second location in a cloud storage where the VHD data is stored; and communicating from the cloud server the second address to the remote computing device for facilitating access to the VHD data stored in the cloud storage.

Thin provisioning virtual desktop infrastructure virtual machines in cloud environments without thin clone support

Secure shared access to encrypted data in a data store is facilitated by using a data control server (DCS) to maintain a data storage reference table (DSRT) for shared data units present in a shared data pool hosted by least one data storage device, and accessible to a plurality of computing entities. The DSRT specifies for each shared data unit identifier information, location information for accessing the shared data unit in the shared data pool, and a hash value which has been computed for the shared data unit. The DCS selectively facilitates a decryption operation by providing hash values which serves as a basis for deriving a decryption key for decrypting shared data units which have been identified.

Secured encrypted shared cloud storage

A first computing device is provided for virtual disk provisioning. The first computing device includes one or more processors configured to provide a first virtual disk and a first publish differencing disk. The one or more processors are further configured to obtain meta data associated with the first virtual disk and the first publish differencing disk, and generate one or more first differencing patches and one or more second differencing patches. The first and second differencing patches having a binary format. The first computing device further includes a storage configured to store data associated with the first virtual disk and the first publish differencing disk, the meta data, and the one or more first and second differencing patches. The first computing device further includes a communication subsystem configured to provide one or more first and second differencing patches to provision the virtual machine associated with a second computing device.

Method and system for optimizing virtual disk provisioning

A distributed virtual desktop infrastructure system includes at least one management server and a plurality of client management applications. The management server includes at least one processor, and is programmed and/or configured to determine a home system of the plurality of client systems for at least one user. The plurality of client management applications are in communication with the at least one management server, and are configured to execute on the plurality of client system and display, on at least one client system, a virtual desktop of at least one virtual machine executing on the home system. Related systems and methods are also described.

System and method for a distributed virtual desktop infrastructure

A transparent high-availability solution utilizing virtualization technology is presented. A cluster environment and management thereof is implemented through an automated installation and setup procedure resulting in a cluster acting as a single system. The cluster is setup in an isolated virtual machine on each of a number of physical nodes of the system. Customer applications are run within separate application virtual machines on one physical node at a time and are run independently and unaware of their configuration as part of a high-availability cluster. Upon detection of a failure, traffic is rerouted through a redundant node and the application virtual machines are migrated from the failing node to another node using live migration techniques.

Systems and methods of high availability cluster environment failover protection

A system is provided for rapidly synchronizing two or more processing elements in a fault-tolerant computing system. Embodiments of this system allow for the rapid synchronization of two processing elements through partial copies of the contents of memory associate with each processing element.

Systems and methods for maintaining lock step operation

Methods and systems are provided by which a computer system, and in particular, a lockstep fault-tolerant computer system, may be split into a plurality of independently operational subsystems. Each subsystem may be examined, managed or upgraded by an administrator while the overall computer system continues to service end-users. Finally, the separate subsystems may be merged in an efficient fashion and fault-tolerant operation will resume upon the combined system.

Systems and methods for split mode operation of fault-tolerant computer systems

A computer system includes a port duplex driver (PDD) that creates a &ldquo;virtual SCSI adaptor,&rdquo; to control the operations of one or more redundant SCSI adaptors. During boot-up operations or when the status of a device on a SCSI bus changes, the PDD identifies the virtual SCSI adaptor as the only adaptor that provides access to particular storage devices on the SCSI bus. System components then direct data transfer operations through the virtual SCSI adaptor to the storage devices. The PDD intercepts commands that are directed through the virtual SCSI adaptor, and redirects the commands to a selected one of the actual SCSI adaptors. The selected SCSI adaptor then operates in a conventional manner, to translate the generic commands from the system components to device-specific commands for the storage devices on the SCSI bus. If the selected SCSI adaptor fails, the PDD redirects the data transfer operations instead through one of the redundant SCSI adaptors. The failure does not affect the remainder of the system, which continues to conduct data transfer operations through the virtual SCSI adaptor.

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Maynard, MA, United States of America

Simon P Graham