US20150089383A1 - Virtual Desktop Infrastructure (VDI) Login Acceleration - Google Patents
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- US20150089383A1 US20150089383A1 US14/555,395 US201414555395A US2015089383A1 US 20150089383 A1 US20150089383 A1 US 20150089383A1 US 201414555395 A US201414555395 A US 201414555395A US 2015089383 A1 US2015089383 A1 US 2015089383A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/08—Protocols specially adapted for terminal emulation, e.g. Telnet
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- H04L67/2842—
Definitions
- the present invention relates generally to virtual desktop infrastructure (VDI) login acceleration.
- VDI virtual desktop infrastructure
- Remote desktop applications allow users to access services provided by remote servers via a graphical user interface (GUI) on a local client device.
- GUI graphical user interface
- One significant consideration for remote desktop applications is that performance is heavily influenced by network conditions, as the quality of user experience may suffer greatly when network conditions are poor (e.g., low connection speeds, latency, etc.). More specifically, screen images from the remote server must be transported over the network before being viewed by the user on the local device. Techniques for improving the performance of remote desktop services are desired.
- VDI virtual desktop infrastructure
- a method for providing remote desktop services includes displaying a first image on a client device during a first remote desktop session.
- the first remote desktop session corresponds to a service provided by a remote server over a network.
- the method further includes caching data for the first image in a persistent storage location on the client device, and using the cached data to display a second image on the client device during a second remote desktop session.
- the second image is at least partially correlated with the first image.
- the first remote desktop session is closed before the second remote desktop session is established, and the cached data remains stored in the persistent storage location of the client device between closing of the first remote desktop session and establishment of the second remote desktop session.
- An apparatus for performing this method is also provided.
- FIG. 1 illustrates a conventional network for providing remote desktop services.
- FIG. 2 illustrates an embodiment network for providing remote desktop services
- FIG. 3 illustrates a protocol diagram of a communications sequence for providing remote desktop services
- FIG. 4 illustrates a flowchart of a method for providing remote desktop services
- FIG. 5 illustrates a flowchart of another method for providing remote desktop services
- FIG. 6 illustrates a diagram of hash tables used for caching image data
- FIG. 7 illustrates a diagram of an embodiment communications device.
- image data of the desktop image may be cached in volatile memory (e.g., random access memory, etc.) on the client device such that the image data does not have to be constantly re-transported across the network during a remote desktop application session.
- volatile memory e.g., random access memory, etc.
- conventional caching is session based, and therefore only stores image data from the current session.
- image data cached for a given session will only be stored for so long as the given session continues its runtime operation.
- users may experience significant delays when starting a new remote desktop session. Such delays may be particularly burdensome in a multi-user network implantation (e.g., an office environment) during high traffic periods, such as in the morning when many users may start new remote desktop sessions. Accordingly, techniques for increasing performance of remote desktop application session initialization are desired.
- image data from an image displayed in an initial session may be stored after the initial session is closed, and thereafter used to display that same image during initialization of a subsequent remote desktop session.
- image data from a remote desktop session of one user may be cached in a location of a local network (e.g., local area network (LAN), or otherwise), and thereafter used to display the same or similar image during a remote desktop session of a different user.
- the image data may be broken up into portions of data representing macroblocks of the image.
- macro-blocks from one image may be used to display portions of a correlated image.
- cached data may improve remote desktop performance even when two distinct (yet correlated) images need to be displayed on the same or different user device.
- FIG. 1 illustrates a conventional network 100 in which a server 120 provides remote desktop services to a client device 110 .
- the server 120 may communicate image data to the client device 110 over the network 140 .
- the image data may be any data capable of displaying an image on the display 112 of the client device 110 , including Joint Photographic Experts Group PEG) data, graphics interchange format (GIF) data, and others.
- the client device 110 may include an image cache 114 , which may be used to cache image data received during a session.
- the image data may be stored in a volatile or non-persistent memory location (e.g., RAM), such that the image data is cleared from the image cache upon termination of the session. As such, redundant image data may need to be re-transported over the network 140 each time a new remote desktop session is initiated on the client device 110 .
- RAM volatile or non-persistent memory location
- FIG. 2 illustrates an embodiment network 200 in which a server 220 provides remote desktop services to a client device 210 over a network 240 .
- the network 200 may include a persistent cache 230 for storing image data between remote desktop sessions. More specifically, image data stored in the image cache 214 may be migrated to the persistent cache 230 when a set time, e.g., when a session closes, at periodic intervals, etc.
- the persistent cache 230 may comprise any type of storage medium, including non-volatile or persistent storage (e.g., read only memory (ROM), etc.), and may be located on the client device 110 , or in a local area network 250 .
- FIG. 3 illustrates a diagram of a protocol 300 for providing remote desktop services to a client 310 .
- the protocol 300 begins when a remote desktop session 316 is closed. Thereafter, image data is read from the cache 314 , and written to the persistent cache 330 . Next, a new connection is started, and the image data is read from the persistent cache to the display such that the image may be shown. Notably, the image is shown without having to re-transport the image from the server 320 over a network, thereby circumventing at least some of the delay associated with conventional session initialize. Subsequently, the image data is cached in the cache memory, and the server is notified of all the cache keys.
- FIG. 4 illustrates a method 400 for providing remote desktop services in accordance with embodiments of this disclosure.
- the method 400 begins at step 410 , where an image is displayed on a client device during an initial virtual desktop session.
- the method 400 proceeds to step 420 , where the initial virtual desktop session is closed.
- the method 400 proceeds to step 430 , where image data for the image displayed during the initial virtual desktop session is cached in a persistent storage location.
- the method 400 proceeds to step 440 , where a new virtual desktop session begins.
- the method 400 proceeds to step 450 , where cached data from the initial virtual desktop session is used to display the image during the new virtual desktop session.
- FIG. 5 illustrates a method 500 for providing remote desktop services in accordance with embodiments of this disclosure.
- the method 500 begins at step 510 , where an image is displayed on a first client device during a virtual desktop session. Thereafter, the method 500 proceeds to step 520 , where image data relating to the image displayed on the first client device is stored in a persistent storage location. Next, the method 500 proceeds to step 530 , where another virtual desktop session begins on a second client device.
- the method 500 proceeds to step 540 , where cached data from the first client device's virtual desktop session is used to display an image on the second client device.
- the image displayed on the second client device need not be identical to the image displayed on the first client device. Instead, the images may be at least partially correlated.
- the persistent storage location may be located in a LAN server providing access to both client devices. Alternatively, the persistent storage location may be positioned locally in one or both of the client devices.
- images may be broken down into portions (e.g., macroblocks), with the image data including data corresponding to individual macroblocks.
- the image data may be cached using a plurality of reference indexes (e.g., cyclic redundancy checks (CRCs)), such that portions of the image data may be used to display correlated portions of a separate/distinct image.
- CRCs cyclic redundancy checks
- a hash function may be applied to each portion of image data to obtain a hash value for said portions of image data.
- FIG. 6 illustrates an example of how distinct (yet correlated images) may share common hash values.
- a hash value (hash 4 ) is common between a hash key queue for a first image (ID 1 ) and a hash key queue for a second image (ID 2 ).
- image data cached for the first image may be used to reduce the amount of image data that must be transported over the network to display the second image.
- FIG. 7 illustrates a block diagram of an embodiment of a communications device 700 , which may be equivalent to one or more devices (e.g., server, client device, LAN device, etc.) discussed above.
- the communications device 700 may include a processor 704 , a memory 706 , and a plurality of interfaces 710 - 714 , which may (or may not) be arranged as shown in FIG. 7 .
- the processor 704 may be any component capable of performing computations and/or other processing related tasks
- the memory 706 may be any component capable of storing programming and/or instructions for the processor 704 .
- the interfaces 710 - 714 may be any components or collection of components that allow the communications device 700 to communicate with other devices.
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Abstract
The time required to login to a remote or virtual desktop can be reduced by caching image data in a persistent memory location of a client device in-between remote desktop sessions. For instance, image data related to an image displayed on the client device during a first virtual desktop session may be cached after terminating the first virtual desktop session. The cached data can then be used to display the same image, or a correlated image, on the client device during a subsequent remote desktop session, thereby avoiding the need to re-transport the image data over a network.
Description
- This patent application is a continuation of U.S. application Ser. No. 13/730,887, filed on Dec. 29, 2012 and entitled “Virtual Desktop Infrastructure (VDI) Login Acceleration,” which is hereby incorporated by reference herein as if reproduced in its entirety.
- The present invention relates generally to virtual desktop infrastructure (VDI) login acceleration.
- Remote desktop applications allow users to access services provided by remote servers via a graphical user interface (GUI) on a local client device. One significant consideration for remote desktop applications is that performance is heavily influenced by network conditions, as the quality of user experience may suffer greatly when network conditions are poor (e.g., low connection speeds, latency, etc.). More specifically, screen images from the remote server must be transported over the network before being viewed by the user on the local device. Techniques for improving the performance of remote desktop services are desired.
- Technical advantages are generally achieved, by embodiments of this disclosure which describe virtual desktop infrastructure (VDI) login acceleration.
- In accordance with an embodiment, a method for providing remote desktop services is provided. In this example, the method includes displaying a first image on a client device during a first remote desktop session. The first remote desktop session corresponds to a service provided by a remote server over a network. The method further includes caching data for the first image in a persistent storage location on the client device, and using the cached data to display a second image on the client device during a second remote desktop session. The second image is at least partially correlated with the first image. The first remote desktop session is closed before the second remote desktop session is established, and the cached data remains stored in the persistent storage location of the client device between closing of the first remote desktop session and establishment of the second remote desktop session. An apparatus for performing this method is also provided.
- For a more complete understanding of the present disclosure, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:
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FIG. 1 illustrates a conventional network for providing remote desktop services. -
FIG. 2 illustrates an embodiment network for providing remote desktop services; -
FIG. 3 illustrates a protocol diagram of a communications sequence for providing remote desktop services; -
FIG. 4 illustrates a flowchart of a method for providing remote desktop services; -
FIG. 5 illustrates a flowchart of another method for providing remote desktop services; -
FIG. 6 illustrates a diagram of hash tables used for caching image data; and -
FIG. 7 illustrates a diagram of an embodiment communications device. - Corresponding numerals and symbols in the different figures generally refer to corresponding parts unless otherwise indicated. The figures are drawn to clearly illustrate the relevant aspects of the embodiments and are not necessarily drawn to scale.
- The making and using of embodiments of this disclosure are discussed in detail below. It should be appreciated, however, that the concepts disclosed herein can be embodied in a wide variety of specific contexts, and that the specific embodiments discussed herein are merely illustrative and do not serve to limit the scope of the claims. Further, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of this disclosure as defined by the appended claims.
- One technique for improving the performance of remote desktop applications is to cache image data on the client side of the network. For instance, image data of the desktop image may be cached in volatile memory (e.g., random access memory, etc.) on the client device such that the image data does not have to be constantly re-transported across the network during a remote desktop application session. However, conventional caching is session based, and therefore only stores image data from the current session. To wit, image data cached for a given session will only be stored for so long as the given session continues its runtime operation. As such, users may experience significant delays when starting a new remote desktop session. Such delays may be particularly burdensome in a multi-user network implantation (e.g., an office environment) during high traffic periods, such as in the morning when many users may start new remote desktop sessions. Accordingly, techniques for increasing performance of remote desktop application session initialization are desired.
- Disclosed herein are techniques and mechanisms that reduce delays associated with remote desktop application session initialization through caching image data in persistent (e.g., non-volatile memory) in-between sessions. For instance, in one embodiment image data from an image displayed in an initial session may be stored after the initial session is closed, and thereafter used to display that same image during initialization of a subsequent remote desktop session. In another embodiment, image data from a remote desktop session of one user may be cached in a location of a local network (e.g., local area network (LAN), or otherwise), and thereafter used to display the same or similar image during a remote desktop session of a different user. In some embodiments, the image data may be broken up into portions of data representing macroblocks of the image. In such embodiments, macro-blocks from one image may be used to display portions of a correlated image. Hence, cached data may improve remote desktop performance even when two distinct (yet correlated) images need to be displayed on the same or different user device.
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FIG. 1 illustrates aconventional network 100 in which aserver 120 provides remote desktop services to aclient device 110. In providing the remote desktop service, theserver 120 may communicate image data to theclient device 110 over thenetwork 140. The image data may be any data capable of displaying an image on thedisplay 112 of theclient device 110, including Joint Photographic Experts Group PEG) data, graphics interchange format (GIF) data, and others. Theclient device 110 may include animage cache 114, which may be used to cache image data received during a session. However, the image data may be stored in a volatile or non-persistent memory location (e.g., RAM), such that the image data is cleared from the image cache upon termination of the session. As such, redundant image data may need to be re-transported over thenetwork 140 each time a new remote desktop session is initiated on theclient device 110. - One solution may be to store the image data in a persistent cache, such that image data is stored between sessions.
FIG. 2 illustrates anembodiment network 200 in which aserver 220 provides remote desktop services to aclient device 210 over anetwork 240. Unlike thenetwork 100, thenetwork 200 may include apersistent cache 230 for storing image data between remote desktop sessions. More specifically, image data stored in theimage cache 214 may be migrated to thepersistent cache 230 when a set time, e.g., when a session closes, at periodic intervals, etc. Thepersistent cache 230 may comprise any type of storage medium, including non-volatile or persistent storage (e.g., read only memory (ROM), etc.), and may be located on theclient device 110, or in alocal area network 250. -
FIG. 3 illustrates a diagram of aprotocol 300 for providing remote desktop services to aclient 310. Theprotocol 300 begins when aremote desktop session 316 is closed. Thereafter, image data is read from thecache 314, and written to thepersistent cache 330. Next, a new connection is started, and the image data is read from the persistent cache to the display such that the image may be shown. Notably, the image is shown without having to re-transport the image from theserver 320 over a network, thereby circumventing at least some of the delay associated with conventional session initialize. Subsequently, the image data is cached in the cache memory, and the server is notified of all the cache keys. -
FIG. 4 illustrates amethod 400 for providing remote desktop services in accordance with embodiments of this disclosure. Themethod 400 begins atstep 410, where an image is displayed on a client device during an initial virtual desktop session. Next, themethod 400 proceeds to step 420, where the initial virtual desktop session is closed. Subsequently, themethod 400 proceeds to step 430, where image data for the image displayed during the initial virtual desktop session is cached in a persistent storage location. Thereafter, themethod 400 proceeds to step 440, where a new virtual desktop session begins. Next, themethod 400 proceeds to step 450, where cached data from the initial virtual desktop session is used to display the image during the new virtual desktop session. - In some embodiments, image data from one user's virtual desktop session may be used by another user's virtual desktop session. For instance, two employees at the same company may run similar virtual desktop applications, and may utilize one another's cached image data to achieve improved virtual desktop application performance.
FIG. 5 illustrates amethod 500 for providing remote desktop services in accordance with embodiments of this disclosure. Themethod 500 begins atstep 510, where an image is displayed on a first client device during a virtual desktop session. Thereafter, themethod 500 proceeds to step 520, where image data relating to the image displayed on the first client device is stored in a persistent storage location. Next, themethod 500 proceeds to step 530, where another virtual desktop session begins on a second client device. Subsequently, themethod 500 proceeds to step 540, where cached data from the first client device's virtual desktop session is used to display an image on the second client device. Notably, the image displayed on the second client device need not be identical to the image displayed on the first client device. Instead, the images may be at least partially correlated. Further, the persistent storage location may be located in a LAN server providing access to both client devices. Alternatively, the persistent storage location may be positioned locally in one or both of the client devices. - As discussed above, images may be broken down into portions (e.g., macroblocks), with the image data including data corresponding to individual macroblocks. Accordingly, the image data may be cached using a plurality of reference indexes (e.g., cyclic redundancy checks (CRCs)), such that portions of the image data may be used to display correlated portions of a separate/distinct image. Accordingly, a hash function may be applied to each portion of image data to obtain a hash value for said portions of image data.
FIG. 6 illustrates an example of how distinct (yet correlated images) may share common hash values. As shown, a hash value (hash 4) is common between a hash key queue for a first image (ID1) and a hash key queue for a second image (ID2). As such, image data cached for the first image may be used to reduce the amount of image data that must be transported over the network to display the second image. -
FIG. 7 illustrates a block diagram of an embodiment of acommunications device 700, which may be equivalent to one or more devices (e.g., server, client device, LAN device, etc.) discussed above. Thecommunications device 700 may include aprocessor 704, amemory 706, and a plurality of interfaces 710-714, which may (or may not) be arranged as shown inFIG. 7 . Theprocessor 704 may be any component capable of performing computations and/or other processing related tasks, and thememory 706 may be any component capable of storing programming and/or instructions for theprocessor 704. The interfaces 710-714 may be any components or collection of components that allow thecommunications device 700 to communicate with other devices. - Although the description has been described in detail, it should be understood that various changes, substitutions and alterations can be made without departing from the spirit and scope of this disclosure as defined by the appended claims. Moreover, the scope of the disclosure is not intended to be limited to the particular embodiments described herein, as one of ordinary skill in the art will readily appreciate from this disclosure that processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, may perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
Claims (20)
1. A method for providing remote desktop services, the method comprising:
displaying a first image on a client device during a first remote desktop session, wherein the first remote desktop session corresponds to a service provided by a remote server over a network;
caching data for the first image in a persistent storage location on the client device; and
using the cached data to display a second image on the client device during a second remote desktop session, the second image being at least partially correlated with the first image, wherein the first remote desktop session is closed before the second remote desktop session is established, and
wherein the cached data remains stored in the persistent storage location of the client device between closing of the first remote desktop session and establishment of the second remote desktop session.
2. The method of claim 1 , wherein the second image is identical to the first image.
3. The method of claim 1 , wherein the first image and the second image are non-identical.
4. The method of claim 1 , wherein the first remote desktop session does not overlap with the second remote desktop session.
5. The method of claim 1 , wherein caching the data for the first image in the persistent storage location on the client device comprises:
caching the data for the first image in a non-persistent storage location on the client device during the first remote desktop session;
closing the first remote desktop session; and
migrating the data from the non-persistent storage location of the client device to the persistent storage location of the client device upon closing the remote desktop session.
6. The method of claim 5 , wherein the non-persistent storage location comprises a volatile memory location on the client device.
7. The method of claim 6 , wherein the non-persistent storage location comprises a non-volatile memory location on the client device.
8. The method of claim 5 , wherein using the cached data to display the second image on the client device during the second remote desktop session comprises:
opening the second remote desktop session on the client device;
determining, by the client device, that the second image is at least partially correlated with the first image;
migrating, by the client device, the data from the persistent storage location back to the non-persistent storage location upon determining that the second image is at least partially correlated with the first image; and
using the data to display correlated portions of the second image on the client device during the second remote desktop session.
9. The method of claim 8 , wherein the data is used to display the correlated portions of the second image without the data being communicated to the client device from an external device between closing the first desktop session and displaying the second image.
10. The method of claim 5 , wherein using the cached data to display the second image on the client device during the second remote desktop session comprises:
opening the second remote desktop session on the client device;
determining, by the client device, that the second image is identical to the first image;
migrating, by the client device, the data from the persistent storage location back to the non-persistent storage location upon determining that the second image is at least partially correlated with the first image; and
using the data to display the second image on the client device during the second remote desktop session without receiving any of portion of the data used to display the second image from external devices between closing the first desktop session and displaying the second image.
11. A client device comprising:
a processor; and
a computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
display a first image on a client device during a first remote desktop session, wherein the first remote desktop session corresponds to a service provided by a remote server over a network;
cache data for the first image in a persistent storage location on the client device; and
use the cached data to display a second image on the client device during a second remote desktop session, the second image being at least partially correlated with the first image, wherein the first remote desktop session is closed before the second remote desktop session is established, and
wherein the cached data remains stored in the persistent storage location of the client device between closing of the first remote desktop session and establishment of the second remote desktop session.
12. The client device of claim 11 , wherein the second image is identical to the first image.
13. The client device of claim 11 , wherein the first image and the second image are non-identical.
14. The client device of claim 11 , wherein the first remote desktop session does not overlap with the second remote desktop session.
15. The client device of claim 11 , wherein the instructions to cache the data for the first image in the persistent storage location on the client device include instructions to:
cache the data for the first image in a non-persistent storage location on the client device during the first remote desktop session;
close the first remote desktop session; and
migrate the data from the non-persistent storage location of the client device to the persistent storage location of the client device upon closing the remote desktop session.
16. The client device of claim 15 , wherein the non-persistent storage location comprises a volatile memory location on the client device.
17. The client device of claim 16 , wherein the non-persistent storage location comprises a non-volatile memory location on the client device.
18. The client device of claim 16 , wherein the instructions to use the cached data to display the second image on the client device during the second remote desktop session include instructions to:
open the second remote desktop session on the client device;
determine that the second image is at least partially correlated with the first image;
migrate the data from the persistent storage location back to the non-persistent storage location upon determining that the second image is at least partially correlated with the first image; and
use the data to display correlated portions of the second image on the client device during the second remote desktop session.
19. The client device of claim 18 , wherein the data is used to display the correlated portions of the second image without the data being communicated to the client device from an external device between closing the first desktop session and displaying the second image.
20. The client device of claim 18 , wherein the instructions to use the cached data to display the second image on the client device during the second remote desktop session include instructions to:
open the second remote desktop session on the client device;
determine that the second image is identical to the first image;
migrate the data from the persistent storage location back to the non-persistent storage location upon determining that the second image is at least partially correlated with the first image;
use the data to display the second image on the client device during the second remote desktop session without receiving any of portion of the data used to display the second image from external devices between closing the first desktop session and displaying the second image.
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US8949320B2 (en) * | 2012-11-30 | 2015-02-03 | Red Hat Israel, Ltd. | Managing a distributed cache for virtual machines |
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US20140188982A1 (en) | 2014-07-03 |
US20140189035A1 (en) | 2014-07-03 |
US8924478B2 (en) | 2014-12-30 |
US8819139B2 (en) | 2014-08-26 |
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