Vmware, Inc.

Omnissa, LLC

Alcatel-lucent USA Inc.

Kun Shi

Hui Yuan

Hui Zhang

Weigang Huang

Mangui She

Dong Wang

Haiou Jiang

Feng Yan

Peng Guo

Yunfei San

Bo Liu

Adam Gregory Gross

Wenlong Shao

Jin Yu

Haiwei Zhao

Lingjun Kong

Wu Bai

Qi Sun

Li Huang

Qi An

David Snowdon

Hua Zhang

Zhao Li

Yue Zhao

Ning Yu

Ji Min Zhang

Jinxing Hu

Yuping Wei

Na Sun

Yueting Zhang

Tong Zhao

Gang Si

Hai Jiang

Songli Li

Bomin Nie

Xi Yin Liu

Yan Lai Wang

Zhiyu Li

Ji Zheng Zhang

Example methods and systems to implement an economic printing mode are described. In one example, a computer system may provide a user interface specifying multiple selectable levels associated with economic printing mode. The source printing content may be transformed to generate target printing content that is printable using a lower ink consumption compared to the source printing content. For example, in response to a selection of a first level, print quality may be reduced. In response to a selection of a second level, image information in the source printing content may be modified. In response to a selection of a third level, font information associated with textual information in the source printing content may be modified. The computer system may provide the target printing content that includes modified font information to the printer for printing and/or generate a preview of the target printing content prior to printing using the printer.

Economic printing mode

Secure printing may be performed in a virtual desktop infrastructure (VDI) in a virtualized computing environment. When a file is selected for secure printing, print data for the file is stored, and a corresponding entry is created in a metadata map. A message is sent to a user device to inform a user that the file is available for secure printing. The message may include a uniform resource locator (URL) link having a hash code corresponding to the stored print data. If the user accesses the URL link to request the secure printing, the hash code is retrieved from the URL link and compared against the entry in the metadata map. If there is a match between the hash code and the entry in the metadata map, the file is sent to a target local printer for printing.

Secure printing in a virtualized computing environment

The disclosure provides a method of associating thread identifiers (IDs) to input/output (I/O) requests in a remote computing environment. The method generally includes receiving, by a mini-filter on a remote device that is remote from a client device, a request from an application on the remote device to access resources at the client device, determining, by the mini-filter, a thread identifier (ID) associated with the request, the thread ID corresponding to an application thread of the application that generated the request, determining, by the mini-filter, one or more parameters of the request, and transmitting, by the mini-filter, to a redirection server process on the remote device, a message comprising the thread ID and the one or more parameters of the request, wherein the thread ID and the one or more parameters of the request are added to a cache maintained by the redirection server process.

Input/output (I/O) performance in remote computing environments using a mini-filter driver

System and methods are provided for improved directory enumeration on shared client directories in virtual desktops. A merged I/O request containing multiple expected I/O requests for enumerating a directory can be produced on the virtual desktop. The merged I/O request can be conveyed to the client device and a merged I/O response containing multiple I/O responses to the expected I/O requests can be received from the client device. The received I/O responses can be stored in cache memory on the virtual desktop and used to respond to subsequent queries for enumerating the directory on the virtual desktop.

Merged input/output for accelerating directory listing phase in client drive redirection

System and method are described for copying and pasting files and folders between a client and a virtual desktop via clipboard redirection. A virtual desktop session can be established by the client on the virtual desktop. The user can copy a file or folder to the virtual desktop clipboard and a path corresponding to the file or folder can be stored in the virtual desktop clipboard in a path list. When the user ungrabs the agent or switches focus out of the virtual desktop to the client, the path list can be transferred to the client device and set into the client clipboard. Subsequently, a request can be received in the client device to paste the copied file or folder to a target location in the client device. In response to the request, the client device can retrieve the contents of the copied file or folder from the agent and the contents can be placed in the target location to complete the paste operation.

File copy and paste between local and remote system in virtual desktops via clipboard redirection

Example methods and systems are described to add a watermark for printing in a virtual desktop environment having an agent side and a client side. A watermark can be configured at the agent side for printing at the client side. At the agent side, a fallback font can be determined for text of the watermark, and coordinate space calculation can be performed, so that the watermark prints correctly at the client side.

Adding a watermark on a document for printing in a virtual desktop infrastructure (VDI) environment

The capability to print to a portable document format (PDF) file is provided in a virtualized computing environment that supports a virtual desktop infrastructure (VDI). Printing-related properties, of local printers coupled to a client device, are provided to a host, so that virtual printers at the host can be configured with the printing-related properties. A simulator may be provided at the host to receive the printing-related properties from the client device and to receive a query from a virtualized computing instance for the printing-related properties, instead of the query being directly sent to the client device.

Document printing in a virtualized computing environment

A method of copying at least first and second files stored in a client computing device to a host server, includes the steps of: generating at the host server a first read I/O request for data of the first file based on responses to pre-read I/O requests for the first file, received from the client computing device; transmitting a merged I/O request that includes the first read I/O request for data of the first file and pre-read I/O requests for the second file from the host server to the client computing device; generating at the host server a second read I/O request for data of the second file based on responses to the pre-read I/O requests for the second file, received from the client computing device; and transmitting the second read I/O request for data of the second file from the host server to the client computing device.

Method to improve copy performance of client drive redirection with per-thread merged input/output

A print driver store is usable for redirection printing in a virtualized computing environment that supports virtual desktops. Native print drivers are uploaded to the print driver store from a client side. When an agent attempts to instantiate a virtual printer at the agent side that corresponds to a physical printer at the client side, the agent checks to determine if a native print driver for the physical printer is installed at the agent side. If the native print driver is not installed, then the agent obtains the native print driver from the print driver store and installs the native print driver at the agent side. The agent completes the instantiation of the virtual printer at the agent side and associates the native print driver with the virtual printer.

Print driver store for redirection printing in a virtualized computing environment

Techniques are described for auditing print content during printer redirection in a virtual desktop. The ability to audit redirected print content allows an organization to pre-define certain sensitive data and to track whether print redirection requests in the virtual desktop environment contain any such sensitive data. If such sensitive data is contained in a printer redirection request, a file is generated containing information about the sensitive data, as well as a watermark that encodes information about the printer redirection request, such the user identifier of the user who initiated the print request and a timestamp of when the print request occurred. The generated file is transmitted to one or more registered recipients.

Print content auditing during printer redirection in virtual desktop environments

Example methods and systems to implement an economic printing mode with font information modification are described. In one example, a computer system may obtain source printing content associated with a print job that is destined for a printer and the economic printing mode may be selected for the print job. The computer system may extract, from the source printing content, (a) textual information to be printed and (b) font information associated with the textual information. The source printing content may be transformed to generate target printing content that is printable using a lower ink consumption compared to the source printing content by modifying the font information associated with the textual information. The computer system may provide the target printing content that includes modified font information to the printer for printing and/or generate a preview of the target printing content prior to printing using the printer.

Economic printing mode with font information modification

Example methods and systems for printing ink consumption estimation are described. In one example, a computer system may obtain printing content associated with a document that is printable using a printer. Based on the printing content, the computer system may generate an image representation of the document, wherein the image representation includes an array of multiple pixels associated with first color information from a first color space. Color conversion may be performed by converting (a) the first color information from the first color space to (b) second color information from a second color space associated with the printer. The computer system may estimate an amount of printing ink required for printing the document based on the second color information and provide the estimated amount of printing ink to a user via a user interface.

Printing ink consumption estimation

The disclosure provides an approach for print redirection in a remote computing environment. Embodiments include receiving, on a remote device, a request to perform a printing task using a printing device associated with a client device. Embodiments include determining, on the remote device, that data associated with the request to perform the printing task exceeds a size threshold. Embodiments include generating, on the remote device, a plurality of data slices based on the data, wherein each respective data slice of the plurality of data slices comprises a respective subset of the data that does not exceed the size threshold. Embodiments include transmitting, from the remote device to the client device, the plurality of data slices as separate transmissions in separate time intervals along with information that allows the data to be reconstructed from the plurality of data slices for performing the printing task on the client device.

Feature-based flow control in remote computing environments

A varied least recently used (VLRU) caching technique is used to enable print data to be available at a cache of a client for printing, even after an agent performs a deletion of a hash value for the print data at a cache of the agent. The deletion of the print data (cached at the cache of the client) is postponed at the client device via the use of a waiting list, so that the cached print data can be printed at a physical printer of the client, in response to receiving a delayed print job from the agent that specifies the hash value as a result of a deduplication process performed by the agent.

Cache management in a printing system in a virtualized computing environment

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Beijing, China

Kun Shi