Abstract: Systems and methods for pre-fetching data based on memory usage patterns. An example method comprises: receiving a first memory access request identifying a first memory block; receiving a second memory access request identifying a second memory block; update a memory access tracking data structure by incrementing a sequence counter corresponding to a memory access sequence that references the first memory block and the second memory block; receive a third memory access request identifying a third memory block; identifying, based on the memory access tracking data structure, a sequence counter having a maximal value among sequence counters associated with memory access sequences that reference the third memory block; and pre-fetching a fourth memory block corresponding to the identified sequence counter.

Abstract: Systems and methods for facilitating access to files that are stored by network-accessible file storage services. An example system comprises a plurality of file access nodes including a control node, wherein the control node is configured to: receive a file access request initiated by a client, wherein the file access request comprises an identifier of a file, an identifier of a file storage service, and an access token associated with the file stored by the file storage service; request, using the access token, metadata associated with the file from the file storage service; define, using the metadata, a plurality of portions forming the file; and forward, to the plurality of file access nodes, identifiers of the plurality of portions.

Abstract: A system and method is provided for managing virtualized computing resources. An exemplary method includes executing a computing service comprised of virtualized computing resources including a first virtual machine and a network address mapping module. The method further includes, responsive to receiving an indication that additional virtualized computing resources are needed to handle one or more requests from a client and directed to the computing service, generating a second virtual machine that can handle requests for the computing service by performing a linked cloning operation of the first virtual machine. The method includes, configuring the network address mapping module to modify requests for the second virtual machine, such that the second virtual machine has the same network address as the first virtual machine.

Abstract: A system and method is provided for managing virtualized computing resources. An exemplary method includes executing a computing service comprised of virtualized computing resources including a first virtual machine and a network address mapping module. The method further includes, responsive to receiving an indication that additional virtualized computing resources are needed to handle one or more requests from a client and directed to the computing service, generating a second virtual machine that can handle requests for the computing service by performing a linked cloning operation of the first virtual machine. The method includes, configuring the network address mapping module to modify requests for the second virtual machine, such that the second virtual machine has the same network address as the first virtual machine.

Abstract: Systems and methods for facilitating access to files that are stored by network-accessible file storage services. An example system comprises a plurality of file access nodes including a control node, wherein the control node is configured to: receive a file access request initiated by a client, wherein the file access request comprises an identifier of a file, an identifier of a file storage service, and an access token associated with the file stored by the file storage service; request, using the access token, metadata associated with the file from the file storage service; define, using the metadata, a plurality of portions forming the file; and forward, to the plurality of file access nodes, identifiers of the plurality of portions.

Abstract: Systems and methods for pre-fetching data based on memory usage patterns. An example method comprises: receiving a first memory access request identifying a first memory block; receiving a second memory access request identifying a second memory block; update a memory access tracking data structure by incrementing a sequence counter corresponding to a memory access sequence that references the first memory block and the second memory block; receive a third memory access request identifying a third memory block; identifying, based on the memory access tracking data structure, a sequence counter having a maximal value among sequence counters associated with memory access sequences that reference the third memory block; and pre-fetching a fourth memory block corresponding to the identified sequence counter.

Abstract: Systems and methods for facilitating access to files that are stored by network-accessible file storage services. An example system comprises a plurality of file access nodes including a control node, wherein the control node is configured to: receive a file access request initiated by a client, wherein the file access request comprises an identifier of a file, an identifier of a file storage service, and an access token associated with the file stored by the file storage service; request, using the access token, metadata associated with the file from the file storage service; define, using the metadata, a plurality of portions forming the file; and forward, to the plurality of file access nodes, identifiers of the plurality of portions.

Abstract: A document classifier, executed by a processing device, groups a plurality of stored documents using machine learning to create a plurality clusters that each include documents having similar characteristics. The document classifier further determines a document classification for each of the plurality of clusters based on a subset of the documents in each respective cluster. In addition, the document classifier associates a determined document classification with each of the plurality of documents, wherein resulting classifications of documents are used to filter search results in response to queries of end users.

Abstract: Disclosed are systems and methods for parallel processing an input data set. During a map stage of a computation, starting with a first virtual machine (VM) acting as a parent VM and an input data set, the system clones the parent VM to generate at least one linked clone child VM. The system further divides the input data set into a first chunk for the parent VM and a second chunk for the at least one child VM by determining a starting pointer for each chunk. Each chunk is processed by a VM to generate an intermediate data result, which is stored in a network storage device. The plurality of VMs then perform a reduce stage on the plurality of intermediate data results stored in the network storage device.

Abstract: Systems and methods for providing access to mobile applications by heterogeneous devices. An example method comprises: initializing, by a host computer system, a virtual machine running a mobile operating system (OS); intercepting, by a host agent running on the host computer system, a video output associated with a window of an application running on the virtual machine; forwarding the video output to a client device; receiving, from the client device, a user interface input directed to the application; and forwarding the user interface input to the virtual machine.

Abstract: A document search engine facilitates input prediction for searching content within stored documents associated with a user by maintaining a data structure comprising entries that are each associated with one of the stored documents, wherein each entry comprises textual content of one of the stored documents, and wherein the textual content comprises a plurality of characters. The textual content of each entry in the data structure is analyzed to identify sequential relationships between the characters in the textual content. An input text comprising a text character is received from a user as part of a search query, and a predicted text to follow the input text is determined, where the predicted text is based on the one or more sequential relationships between the characters in the textual content. The document search engine then provides the search query including the input text and the predicted text to the client device.

Abstract: A system and method is provided for performing computations on a virtual machine without a special hardware computation unit, such as a discrete graphics processing unit (GPU). The described method uses a computation module to intercept requests from a user application executing in a virtual machine on a first physical computer. The intercepted requests may include requests to configure GPU computation grids, start and finish accelerated code execution, and transfer data to and from the special computation unit. The computation module offloads accelerated code to a second physical computer having a physical special hardware unit (e.g., discrete GPU).

Abstract: Systems and methods are disclosed herein for caching data in a virtual storage environment. An exemplary method comprises monitoring, by a hardware processor, operations on a virtual storage device, identifying, by a hardware processor, transitions between blocks of the virtual storage device that have the operations performed thereon, determining, by a hardware processor, a relationship between each of the blocks based on the identified transitions, clustering the blocks into groups of related blocks based on the relationship and applying, by a hardware processor, one of a plurality of different caching policies to blocks in each of the groups based on clustering.

Abstract: Systems and methods for facilitating access to files that are stored by network-accessible file storage services. An example system comprises a plurality of file access nodes including a control node, wherein the control node is configured to: receive a file access request initiated by a client, wherein the file access request comprises an identifier of a file, an identifier of a file storage service, and an access token associated with the file stored by the file storage service; request, using the access token, metadata associated with the file from the file storage service; define, using the metadata, a plurality of portions forming the file; and forward, to the plurality of file access nodes, identifiers of the plurality of portions.

Abstract: A communication channel may be implemented from a host operating system (OS) to a guest OS of a virtual machine. The method may include receiving an instruction to create a communication channel between a guest OS of a virtual machine and host OS of a host computer system. The method may further include transmitting, to a virtual Universal Serial Bus (USB) hub executed by the host OS, a first request to create a virtual USB device on the virtual USB hub. The method may also include providing the virtual USB device to the guest OS and identifying an operation to be performed by the guest OS on the virtual USB device. The method may include providing, from the guest OS to the virtual USB hub of the host OS, a second request that includes the operation to be performed by the guest OS.

Abstract: A system and method is provided for migrating a virtual machine between servers to access physical resources. An exemplary method includes intercepting a request from a client device to access a physical resource; identifying a virtual machine on a first server that is currently hosting a remote application for the client device; identifying a second server associated with the physical resource; and migrating the virtual machine from the first server to the second server, such that the client device can access the physical resource using the second server.

Abstract: Disclosed are systems and methods for establishing secure communication between virtual machines, and, more particularly, to a system and method for establishing secure communication channels between two or more homogenous virtual machines. An exemplary method includes generating, by a first virtual machine, an encryption key compatible with a symmetric encryption algorithm and storing the encryption key in a memory of the first virtual machine; generating a second virtual machine by performing a virtual machine forking operation on the first virtual machine, wherein a memory of the generated second virtual machine contains the encryption key; receiving, by one of the at least two virtual machines, a communication transmitted by another of the at least two virtual machines, wherein the communication comprises data encrypted using the encryption key; and decrypting the data, by the recipient virtual machine, using the encryption key.

Abstract: A document manager facilitates indexing of a plurality of documents stored in a document repository by obtaining a document of the plurality of documents stored in the document repository, where the document comprises a plurality of morphemes. The document manager encodes a morpheme of the plurality of morphemes using an encryption passphrase associated with the client device to generate an encoded morpheme, encodes a location array using the encryption passphrase to generate an encoded location array, where the location array comprises each location of the morpheme within the document, and encodes a unique identifier associated with a location of the document in the document repository using the encryption passphrase to generate an encoded document identifier. The document manager then sends the encoded morpheme, the encoded location array, and the encoded document identifier to a server device to be stored in a search index.

Abstract: Implementations of the disclosure describe grouping documents by content similarity. A method of the disclosure includes determining a first set of document identifiers (IDs) for documents identified responsive to a search query, for each document ID of the first set: obtaining shingles corresponding to the document ID, identifying a second set of document IDs corresponding to the obtained shingles, grouping the identified document IDs of the second set in a grouping data structure, and determining resulting document IDs from the grouping data structure, the resulting document IDs corresponding to a threshold number of the document IDs in the grouping data structure having a highest number of occurrences. The method further includes associating the documents corresponding to the resulting documents IDs with one another in search results generated responsive to the search query.

Abstract: A system and method is provided for performing computations on a virtual machine without a special hardware computation unit, such as a discrete graphics processing unit (GPU). The described method uses a computation module to intercept requests from a user application executing in a virtual machine on a first physical computer. The intercepted requests may include requests to configure GPU computation grids, start and finish accelerated code execution, and transfer data to and from the special computation unit. The computation module offloads accelerated code to a second physical computer having a physical special hardware unit (e.g., discrete GPU).