Abstract: A computer-readable medium, computer-implemented method, and system are provided. In one embodiment, one or more attributes as delta attributes are defined, and a new order object is determined which references an original order object. The original order object referenced by the new order object is determined and the new order object is compared with the original order object to determine one or more delta attributes. The one or more delta attributes are then stored.

Abstract: Aspects of the subject matter described herein relate to operating system technology. In aspects, a mechanism is described that allows self-healing actions to correct operating system problems. The self-healing actions may be performed at virtually any time during the loading and executing of operating system components. Earlier placement of the self-healing actions may allow correction of more operating system component problems than later placement. In one implementation, while self-healing actions are occurring, the instantiating of additional operating system components is not allowed. After the self-healing actions have completed, the instantiating of additional operating system components may continue.

Abstract: A computer implemented method, system, and computer program product for moving a consistency group from a first replication cluster to a second replication cluster, without journal loss, the method comprising moving a splitter splitting the consistency group to tracking mode, flushing pending IO to the consistency group, stopping replication, moving the consistency group to a second cluster, and starting replication of the consistency group at the second cluster.

Abstract: A system that supports multi-threaded transactions includes one or more processors configured to speculatively execute a first thread in a first transaction and speculatively execute a second thread concurrently with the first thread in a comparable transaction with respect to the first transaction. It further includes one or more memories coupled to the one or more processors, configured to provide the one or more processors with data storage. An uncommitted value written by the first thread while executing in the first transaction is visible to the second thread executing in the comparable transaction.

Abstract: Examples of methods and apparatus are provided for state-based provisioning of a local client having a windows-based embedded image. The apparatus may include a retrieval module of the local client that facilitates locating a remote repository server containing a configuration file and that facilitates obtaining the configuration file from the remote repository server. The apparatus may include a reset check module of the local client that determines whether to reset a previous state of the image based on the configuration file. The apparatus may include an apply settings module of the local client that applies, to the image, one of a first configuration change and a second configuration change based on the determination. The first configuration change may include a configuration update to the previous state of the image. The second configuration change may include a change to the image independent of the previous state of the image.

Abstract: Technique for reducing start-up time of a computerized system comprising a computer application with a data base DB and one or more functional blocks with respective memories; the system comprises a communication network being managed by the computer application. The technique comprises providing each of said functional blocks with basic information about the communication network; updating the functional blocks about changes whenever take place in the network; updating objects in the base DB by the updated functional blocks; creating an image of at least one functional block of the blocks in a persistent memory, building a changes log and to in case of failure of the mentioned functional block, promptly restoring thereof by using the image in the persistent memory and the changes log.

Abstract: A removable storage device operates in accordance with transactions defined by a connected host. The removable storage device includes an input unit receiving metadata update operation(s) and log file information, a log information storage storing the log file information, and a transaction manager controlling execution of the metadata update operation(s) and execution of a recovery operation for the transaction following a failure event interrupting the transaction in accordance with the stored log file information.

Abstract: Management of a storage system is facilitated by associating physical volumes of the storage system with virtual volumes corresponding to virtual machines according to specified storage policies in advance. A plurality of disk control devices manage a specified storage area provided by the plurality of physical disks as one or more logical volumes and map the one or more logical volumes matching a storage policy or policies, which include capacity information about a virtual machine(s) and are set to construct the virtual machine, to a virtual volume(s) provided to the virtual machine in response to a request from the management server; and wherein when one of the storage policies is selected, the management server constructs the virtual machine by associating the virtual volume, which complies with the storage policy, with the virtual machine.

Abstract: A coordinator running on a computing device identifies a plurality of participants for a distributed transaction, wherein the coordinator coordinates the distributed transaction. The coordinator determines a participant order for the plurality of participants based on one or more ordering rules. The coordinator sends a message to a first participant in the determined participant order. The coordinator then waits until a response is received from the first participant before sending the message to a second participant in the determined participant order.

Abstract: The distributed computing backup and recovery (DCBR) system and method provide backup and recovery for distributed computing models (e.g., NoSQL) The DCBR system extends the protections from server node-level failure and introduces persistence in time so that the evolving data set may be stored and recovered to a past point in time. The DCBR system, instead of performing backup and recovery for an entire dataset, may be configured to apply to a subset of data. Instead of keeping or recovering snapshots of the entire dataset which requires the entire cluster, the DCBR system identifies the particular nodes and/or archive files where the dataset resides so that backup or recovery may be done with a much smaller number of nodes.

Abstract: A dataset is recovered after a server reboot while clients access the dataset. In response to the reboot, not-yet-completed transactions in a log are parsed to create, for each of the dataset blocks modified by these active transactions, a respective block replay list of the active transactions that modify the block. Once the block replay lists have been created, clients may access specified blocks of the dataset after on-demand recovery of the specified blocks. The on-demand recovery is concurrent with a background recovery task that replays the replay lists. To accelerate log space recovery, the parsing of the log inserts each replay list into a first-in first-out queue serviced by multiple replay threads. The queue can also be used as the cache writeback queue, so that the cache index is used for lookup of the replay list and the recovery state of a given block.

Abstract: Techniques are disclosed that include a computer-implemented method, including storing information related to an initial state of a process upon being initialized, wherein execution of the process includes executing at least one execution phase and upon completion of the executing of the execution phase storing information representative of an end state of the execution phase; aborting execution of the process in response to a predetermined event; and resuming execution of the process from one of the saved initial and end states without needing to shut down the process.

Abstract: An information handling system is provided. The information handling system includes one or more devices coupled together to route information between the one or more devices and other devices coupled thereto based on routing information stored in the one or more devices. The one or more devices includes a routing processor, one or more line cards coupled to the routing processor, the one or more line cards receiving the routing information from the routing processor for routing data packets to a destination, and a memory coupled to the routing processor. The routing processor is configured to create an active image having a current state of the routing information and create a standby image having the current state of the routing information, wherein the standby image requests the current state of the routing information from the active image using a key that is calculated using a portion of the routing information.

Abstract: A system repair method and device, and a storage medium are provided. The system repair method includes: performing security check on system files and registries in a system; when the detection result is abnormal, judging whether the system files and/or the g registries are required to be repaired according to preset system repair rules; and if yes, repairing the system files and/or the registries. The present invention avoids possible abnormal repair in system repair, reduces risks in the system repair, improves security and accuracy of the system repair, and ensures reliability of the system repair.

Abstract: Equipping a first computer with an interface card having an access function of accessing a storage and a communication function of performing a communication via a network. Connecting the interface card equipped in the first computer and a second computer by the network. Causing the interface card to process target data received from the second computer and to cause the target data to be saved in a first storage, which is a storage connected to the interface card, when the second computer transmits the target data to be saved to the interface card.

Abstract: Event counter checkpointing and restoring is disclosed. In one implementation, a processor includes a first event counter to count events that occur during execution within the processor, event counter checkpoint logic, communicably coupled with the first event counter, to store, prior to a transactional execution of the processor, a value of the first event counter, a second event counter to count events prior to and during the transactional execution, wherein the second event counter is to increment without resetting after the transactional execution is aborted, event count restore logic to restore the first event counter to the stored value after the transactional execution is aborted, and tuning logic to determine, in response to aborting of the transactional execution, a number of the events that occurred during the transactional execution based on the stored value of the first event counter and a value of the second event counter.

Abstract: Stackable Layer 2 switches may be upgraded through a stateless upgrade procedure that minimizes software upgrade complexity while leveraging the intrinsic redundancy of the network to minimize traffic disruption. Disclosed methods may be targeted to platforms that lack support for other non-disruptive upgrade technologies, but that can leverage the intrinsic network redundancy to minimize traffic impact during a stack upgrade.

Abstract: An aspect includes providing rollback support in an exposed-pipeline processing element. A system includes the exposed-pipeline processing element with rollback support logic. The rollback support logic is configured to detect an error associated with execution of an instruction in the exposed-pipeline processing element. The rollback support logic determines whether the exposed-pipeline processing element supports replay of the instruction for a predetermined number of cycles. Based on determining that the exposed-pipeline processing element supports replay of the instruction, a rollback action is performed in the exposed-pipeline processing element to attempt recovery from the error.

Abstract: Systems and methods of event driven recovery management are disclosed. In one embodiment, a method of providing event driven recovery management includes continually copying one or more data blocks that are generated from a computing device, associating at least one event marker with the copies of the one or more data blocks, and allowing access to the copies of the one or more data blocks according to the at least one event marker in order to provide event driven recovery. For purposes of this disclosure, an event marker, a book mark, an application consistency point, and/or a business event are interchangeably used, depending on the context.

Abstract: A dataset is concurrently recovered after a server crash while the dataset is actively used for servicing client requests. In response to a reboot, records of not-yet-completed transactions in a transaction log are parsed to create a graph of dependencies between the transactions. Once this graph has been created, clients may access a specified block of the dataset after on-demand recovery of the specified block. The on-demand recovery is concurrent with a background recovery task that replays the not-yet-completed transactions in time order. The on-demand recovery uses the dependency graph to replay any and all transactions that support recovery of the specified block, so that recovery of the specified block includes update of other blocks to be consistent with the recovered block in accordance with the not-yet-completed transactions.

Abstract: Method and Apparatus for rapid scalable unified infrastructure system management platform are disclosed by discovery of compute nodes, network components across data centers, both public and private for a user; assessment of type, capability, VLAN, security, virtualization configuration of the discovered unified infrastructure nodes and components; configuration of nodes and components covering add, delete, modify, scale; and rapid roll out of nodes and components across data centers both public and private.

Abstract: An aspect includes providing rollback support in an exposed-pipeline processing element. A method for providing rollback support in an exposed-pipeline processing element includes detecting, by rollback support logic, an error associated with execution of an instruction in the exposed-pipeline processing element. The rollback support logic determines whether the exposed-pipeline processing element supports replay of the instruction for a predetermined number of cycles. Based on determining that the exposed-pipeline processing element supports replay of the instruction, a rollback action is performed in the exposed-pipeline processing element to attempt recovery from the error.

Abstract: While system-directed checkpointing can be implemented in various ways, for example by adding checkpointing support in the memory controller or in the operating system in otherwise standard computers, implementation at the hypervisor level enables the necessary state information to be captured efficiently while providing a number of ancillary advantages over those prior-art methods. This disclosure details procedures for realizing those advantages through relatively minor modifications to normal hypervisor operations. Specifically, by capturing state information in a guest-operating-system-specific manner, any guest operating system can be rolled back independently and resumed without losing either program or input/output (I/O) continuity and without affecting the operation of the other operating systems or their associated applications supported by the same hypervisor.

Abstract: Techniques are disclosed relating to writing data atomically to one or more recording media. In one embodiment, a request is received to perform an atomic write for a set of data. Responsive to the request, the set of data is written across a plurality of storage units including storing metadata at a dedicated location within at least one of the plurality of storage units. The metadata is usable to determine whether the writing completed successfully. In some embodiments, the request is received from an application that has been assigned an address range of the plurality of storage units. In such an embodiment, the address range is accessible to the application for storing data, and the dedicated location resides outside of the address range. In one embodiment, the metadata specifies an address range where the set of data was written and a sequence number.

Abstract: Information Technology (IT) system configuration is managed using a set of defined flows with atomic execution properties. The instructions to execute a change to one or more infrastructure elements (a “forward transaction”) are maintained with instructions and/or information needed to execute a corresponding “reverse” transaction that is responsible for returning the element(s) to a pre-transaction action state in the event of a configuration failure or other request originating at a high level flow.

Abstract: A processing device may automatically provide protective services and may provide backup services for backing up and restoring user files, system files, configuration files, as well as other information. The processing device may be configured to check one or more performance conditions and perform an action to improve performance based on the one or more performance conditions. The processing device may monitor configuration and file changes and provide a user with a capability to persist or discard configuration changes and/or file changes made by an application during a session. The processing device may include a recovery button or switch, which when selected or pressed may cause the processing device to be restored to an operational state. The processing device may automatically detect instabilities and may automatically attempt to repair possible causes of the instabilities. The processing device may also include an additional chipset, which may perform backup and recovery services.

Abstract: A system differential upgrade method and apparatus, and a mobile terminal are provided. The method includes: obtaining an upgrade script and upgrade data; upgrading a file to be upgraded according to the upgrade script and the upgrade data; generating, according to the file processing command that is being executed currently in the upgrade script, and the file to be upgraded corresponding to the file processing command that is being executed currently, rollback data and a rollback script corresponding to the file to be upgraded; and when the upgrade fails, executing the rollback script according to the rollback data. The apparatus includes an obtaining module, an upgrading module, a generating module, and an executing module. According to the embodiments of the present invention, when an upgrade fails, the rollback script is executed according to the rollback data, which may restore a system to that before the upgrade.

Abstract: The subject matter of this specification can be implemented in, among other things, a computer-implemented method for application lifecycle management. The method includes receiving crash reports from a first version of an application at multiple initial computing devices. The first version of the application is from a first group of versions. The method further includes determining that the crash reports include more than a threshold amount of crash reports. The method further includes determining that a second version of the application from a second group of versions corrects a cause of the crash reports. The method further includes providing instructions to the initial computing devices to retrieve updates to the application from the second group of versions rather than the first group of versions.

Abstract: A method begins by a processing module sending a transaction verification request to the set of dispersed storage (DS) units, wherein the transaction verification request includes a transaction number that corresponds to a particular dispersed storage network (DSN) access request. The method continues with the processing module receiving transaction verification responses from at least some of the set of DS units to produce received transaction verification responses. The method continues with the processing module identifying an undesired condition with processing the DSN access request and initiating a corrective remedy for the undesired condition when a DS unit of the set of DS units does not provide a desired transaction verification response.

Abstract: A backup image generator can create a primary image and periodic delta images of all or part of a primary server. The images can be sent to a network attached storage device and a remote storage server. In the event of a failure of the primary server, the failure can be diagnosed to develop a recovery strategy. Based on the diagnosis, at least one delta image may be applied to a copy of the primary image to generate an updated primary image at either the network attached storage or the remote storage server. The updated primary image may be converted to a virtual server in a physical to virtual conversion at either the network attached storage device or remote storage server and users may be redirected to the virtual server. The updated primary image may also be restored to the primary server in a virtual to physical conversion. As a result, the primary data storage may be timely backed-up, recovered and restored with the possibility of providing server and business continuity in the event of a failure.

Abstract: Approaches are described for enabling a host computing device to store credentials and other security information useful for recovering the state of the host computing device in a secure store, such as a trusted platform module (TPM) on the host computing device. When recovering the host computing device in the event of a failure (e.g., power outage, network failure, etc.), the host computing device can obtain the necessary credentials from the secure store and use those credentials to boot various services, restore the state of the host and perform various other functions. In addition, the secure store (e.g., TPM) may provide boot firmware measurement and remote attestation of the host computing devices to other devices on a network, such as when the recovering host needs to communicate with the other devices on the network.

Abstract: The targeted recovery of application-specific data corresponding to an application without performing recovery of the entire volume. The recovery is initiated by beginning to copy the prior state of the content of an application-specific data container from a prior snapshot to the application-specific data container in an operation volume accessible by the application. However, while the content of the application-specific data container is still being copied from the snapshot to the application-specific data container, the application is still permitted to perform read and write operations on the application-specific data container. Thus, the application-specific data container appears to the application to be fully accessible even though recovery of the content of the application-specific data container is still continuing in the background.

Abstract: A method of backstepping through a program execution includes dividing the program execution into a plurality of epochs, wherein the program execution is performed by an active core, determining, during a subsequent epoch of the plurality of epochs, that a rollback is to be performed, performing the rollback including re-executing a previous epoch of the plurality of epochs, wherein the previous epoch includes one or more instructions of the program execution stored by a checkpointing core, and adjusting a granularity of the plurality of epochs according to a frequency of the rollback.

Abstract: A method includes receiving, at one or more computing devices, user input indicative of a plurality of text characters, wherein at least one text character from the plurality of text characters is operable to cause execution of a shortcut function of an application; determining, at the one or more computing devices, whether the plurality of text characters at least partially matches one or more words from a word list; and executing, at the one or more computing devices, an undo function of the application in response to the shortcut function if the plurality of text characters at least partially matches one or more words from the word list.

Abstract: Logging changes to a physical memory region during a logging time interval includes: detecting a write operation to the physical memory region, wherein the write operation modifies an indirect representation that corresponds to a physical data line in the physical memory region; and recording log information associated with the write operation.

Abstract: A three-dimensional (3-D) processor system includes a first processor chip and a second processor chip in a stacked configuration. The first processor chip includes a first processor having a first set of state registers. The second processor chip includes a second processor having a second set of state registers that corresponds to the first set of state registers. The first and second processors are connected through vertical connections between the first and second processor chips. A mode control circuit operates the processor system in one of a plurality of operating modes. In one mode of operation, the first processor is active and the second processor is inactive, and the first processor operates at a speed greater than a maximum safe speed of the first processor, and the first processor uses the second set of state registers of the second processor to checkpoint a state of the first processor.

Abstract: A snapshot management method includes detecting a change in a configuration of a virtual machine; recording, in a storage unit, a snapshot of a file system of the virtual machine when the change in the configuration is detected; and determining a stable operation of the virtual machine by monitoring an operation status of the virtual machine and deleting, from the storage unit, the last recorded snapshot for the virtual machine when the operation status satisfies a predetermined condition.

Abstract: A three-dimensional (3-D) processor system includes a first processor chip and a second processor chip in a stacked configuration. The first processor chip includes a first processor having a first set of state registers. The second processor chip includes a second processor having a second set of state registers that corresponds to the first set of state registers. The first and second processors are connected through vertical connections between the first and second processor chips. A mode control circuit operates the processor system in one of a plurality of operating modes. In one mode of operation, the first processor is active and the second processor is inactive, and the first processor operates at a speed greater than a maximum safe speed of the first processor, and the first processor uses the second set of state registers of the second processor to checkpoint a state of the first processor.

Abstract: Methods, media, and systems for detecting attack are provided. In some embodiments, the methods include: comparing at least part of a document to a static detection model; determining whether attacking code is included in the document based on the comparison of the document to the static detection model; executing at least part of the document; determining whether attacking code is included in the document based on the execution of the at least part of the document; and if attacking code is determined to be included in the document based on at least one of the comparison of the document to the static detection model and the execution of the at least part of the document, reporting the presence of an attack.

Abstract: Disclosed is an approach for implementing disaster recovery for virtual machines. Consistency groups are implemented for virtual machines, where the consistency group link together two or more VMs. The consistency group includes any set of VMs which need to be managed on a consistent basis in the event of a disaster recovery scenario.

Abstract: A system may identify a second software configuration item for possible backup in response to selection of a first software configuration item for backup, where the first and second software configuration items are related. The system may include a detecting unit for detecting information regarding at least one hardware and at least two software configuration items. A repository may store a set of data for each configuration item based on the detected information. The set of data may include a predetermined attribute of the configuration item and a relation between the configuration item and another configuration item. An identifying unit may then identify the second software configuration item from the attribute and/or the relation upon selection of the first software configuration item for backup.

Abstract: A virtualization manager receives a request to perform a command in a virtual machine system and executes a plurality of transactions associated with the command, each of the plurality of transactions comprising one or more operations executed on entities in the virtual machine system. The virtualization manager commits changes made to the entities in the virtual machine system as a result of the plurality of transactions to a management database for the virtual machine system. In addition, the virtualization manager generates a business entity snapshot corresponding to a first transaction of the plurality of transactions, the business entity snapshot comprising state information for one or more entities in the virtual machine system affected by the first transaction.

Abstract: Architecture for restoring nodes. After restoring a node, fix-up occurs to make the node appears as a different node than before the restore operation. The node appears as a new node, which new node knows the data up to a certain point from when the new node had the prior identity. This allows for new changes generated by the new node to flow to the other nodes in the topology, as well as have the changes that the prior identity sent to other nodes flow back to the new node. In other words, the architecture maintains information to create the new node in the topology while maintaining prior data knowledge. Additionally, item level metadata of associated data items is updated to correlate with the updated data items so that changes can be correctly enumerated and applied. This metadata update occurs across scopes of which the data items are included.

Abstract: A checkpoint marker can be received at a first operator. The first operator can process the checkpoint marker by sending the checkpoint marker to a second operator and sending state checkpoint information representing a state of the first operator to a checkpoint writer. The checkpoint information can be used to rehydrate the state of one or more operators. For example, after a system failure, system shutdown, etc., checkpoint information can be received from a reader unit at a checkpoint information input queue of the first operator. A state of the first operator can be rehydrated using the checkpoint information. Processing of information in a data input queue of the first operator can be suspended while the checkpoint information is used to rehydrate the state of the first operator. Other operators in a system with the first operator (e.g., the second operator) may be checkpointed and rehydrated in the same manner as the first operator.

Abstract: A system for providing prior operation states of a virtual machine in a storage system having at least one storage array is provided. It may be determined that a trigger for taking a snapshot image of the virtual machine and a snapshot of a storage array state has occurred. The snapshot image of the virtual machine may be taken. The snapshot of the storage array state may be taken. The snapshot image of the virtual machine and the snapshot of the storage array state may be made available for subsequent access to rollback the virtual machine and storage array state to a prior state.

Abstract: A messaging system comprises a message source, a message receiver and a message service. The message service is intermediate of the message source and message receiver, and a compensation component is established at the message source. A one way message is transmitted from the message source, where the one-way message is part of a plurality of one way messages of an overall business transaction. The message is received at the message service and is transmitted to the message receiver, which processes the received message. The message receiver transmits a communication indicating success or failure of the processing of the message. The system causes compensation logic defined by a compensation component to execute responsive to receiving an indication of a failure of part of the overall business transaction despite the communication from the message receiver indicated that processing of the particular one way message succeeded.

Abstract: A method of application program-operating system decoupling includes performing, through an application program configured to execute on a client machine, a system call to a first operating system executing on a server machine over an interconnect configured to couple the server machine to the client machine. The method also includes serving the application program configured to execute on the client machine through the first operating system executing on the server machine in accordance with the system call.

Abstract: Several methods and a system of a replicated service for write ahead logs are disclosed. In one embodiment, a method includes persisting a state of a distributed system through a write ahead log (WAL) interface. The method also includes maintaining a set of replicas of a WAL through a consensus protocol. In addition, the method includes providing a set of mechanisms for at least one of detection and a recovery from a hardware failure. The method further includes recovering a persistent state of a set of applications. In addition, the method includes maintaining the persistent state across a set of nodes through the hardware failover. In one embodiment, the system may include a WAL interface to persist a state of a distributed system. The system may also include a WAL replication servlet to maintain and/or recover a set of replicas of a WAL.

Abstract: Certain example embodiments provide a single pass, reverse chronological approach to write-ahead log recovery, enabling space- and time-efficient the recovery of stored data from large write-ahead logs to a transient storage medium. The techniques described herein can in certain instances enable fast and efficient recovery, even in scenarios where at the time of a failure requiring such a recovery the live log is potentially multiple terabytes or larger in size. Certain example embodiments make use of a filtering mechanism (e.g., involving potentially stateful delete, skip, and/or transaction filters), a key/value property (allowing a live set of data, once identified, to be applied in any arbitrary order), etc. A simplified environment with a small closed set of mutative operations allows for the performing of recovery backwards by scanning the log from the most recent written record backwards in time (and, in other words, finishing with the oldest record).

Abstract: Illustrated is a system and method for executing a checkpoint scheme as part of processing a workload using an application. The system and method also includes identifying a checkpoint event that requires an additional checkpoint scheme. The system and method includes retrieving checkpoint data associated with the checkpoint event. It also includes building a checkpoint model based upon the checkpoint data. The system and method further includes identifying the additional checkpoint scheme, based upon the checkpoint model, the additional checkpoint scheme to be executed as part of the processing of the workload using the application.