455 results about "Rollback" patented technology

A method and controller device for upgrading the firmware in a virtualized storage environment having a first storage controller and a second storage controller, wherein each storage controller includes a first virtual machine, at least one second virtual machine and a storage device. The method includes upgrading the current firmware of the first virtual machine in the first storage controller to a new firmware version, upgrading the current firmware of the second virtual machine in the first storage controller to a new firmware version, upgrading the current firmware of the first virtual machine in the second storage controller, upgrading the current firmware of the second virtual machine in the second storage controller, and rolling back the firmware version of all virtual machines in the first and second storage controllers if the firmware upgrade of any of the virtual machines in the first and second storage controllers is not successful.

Multiple revisions of an encoded data slice can be stored in a distributed storage unit. Before writing a new revision of an encoded data slice to storage, the distributed storage unit can invoke a write lock for all encoded data slices having the same slice name as the slice being currently written. The slice being currently written can be stored in temporary storage, and a rollback timer started. If a commit command is received before expiration of the rollback timer, the currently written slice can be permanently stored and made accessible for read requests. If the rollback timer expires prior to the storage unit receiving a commit command, however, a previously stored revision will be used.

The invention belongs to the technical field of distributed computation and discloses a distributed transaction processing method and a device thereof. The distributed transaction processing method includes the steps of application development, transaction management attribute definition, event definition, streaming calculation and transaction management. To be specific, the method includes the steps of acquiring and identifying event information in real time through the streaming calculation, acquiring transaction management attributes in real time, periodically verifying transaction status based on the event information and the transaction management attributes, initiating a verification request and/or a reversal request based on the transaction status, and sending transaction status verification instructions and/or reversal instructions through a transaction manager. With the above-mentioned scheme, the distributed transaction processing method and the device thereof have the advantages of allowing transaction control and the application development to be completely decoupled, not requiring development transaction control logic for the application development, greatly simplifying development difficulty, realizing fast rollback of transactions under abnormal scenarios, tolerating failure of any node and having no brain splitting problem.

The utility model discloses an implementation method for the repeated read of database which is used for a multi-user and multiple transaction concurrency database management system which maintains a transaction list, a rollback segment and an index tree. The method comprises the following steps: firstly, the page satisfying conditions is quickly positioned utilizing the index when traversing the transaction list maintained by the system, wherein the transaction list is used for storing the transaction which is concurrently executed and uncommitted; secondly, the current transaction is checked when traversing the page record to found whether the current record is visible, the current record is added to the result set if the current record is visible; otherwise, the original version is constructed and added to the result set by utilizing the revocation log of the rollback segment maintained by the system, wherein the rollback segment is used for recording the modification of the transactions. The utility model also discloses an implementation apparatus utilizing the method and a database management system utilizing the method and the apparatus.

The invention discloses a method, device and associated equipment for rolling back an application program. The method for rolling back the application program comprises the steps of obtaining current version information of the application program and rollback target version information, further obtaining a patch file corresponding to upgrading from a target version to a current version of the application program, generating an installation file of the target version according to the patch file and a current installation file of the application program, and operating the installation file of the current version. The invention further provides the device, terminal device and server for rolling back the application program. According to the method, device and associated equipment for rolling back the application program, the installation file of the current version of the application program and the patch file corresponding to the upgrading from the target version to the current version of the application program are utilized for obtaining the installation file of the target version, the installation file of the target version is operated to roll back the application program from the current version to the target version.

An approach is provided for managing a reorganization of a database object. Because a reorganization utility cannot acquire exclusive access to the object to complete the reorganization, determinations are made: an amount of transaction log records corresponding to active units of work using the database object is determined to be less than a first threshold; a sum of costs of SQL statements executed in the units of work is determined to be less than a second threshold; and a priority of the reorganization is determined to indicate a greatest priority among multiple priorities. Based on the determinations, (1) a reorganization lock providing exclusive access to the database object is acquired, (2) process(es) holding lock(s) on the database object experience a lockout error, a rollback of the process(es) is issued, and the lock(s) are released, and (3) the utility completes the reorganization based on the lock(s) being released.

The invention discloses a service state consistency maintenance method based on transactions. The service state consistency maintenance method supports restoration attribute variety by introducing and distinguishing four restoration attributes, dynamically confirming the attribute situations of service examples in the dispatched composite service example set and any other relevant service examples in two sets according to restoration attributes, timestamp size and dynamically-detected conflict relation by establishing a rollback composite service example set and a non-rollback composite service example set with a waiting queue, so that service concurrence, destruction, recovery and submitting in a composite service engine are finished. The service state consistency maintenance method supports the service restoration attribute variety and various control modes, can ensure the serializability and restorability of concurrence dispatch, avoid a starvation phenomenon, permit concurrence dispatch and execution of multiple composite service examples executing irrecoverable transactions and support dynamic conflict detection of the service examples and can effectively reduce linkage destruction of long-term running transactions.

The invention discloses a method for quickly reclaiming rollback space in MySQL. The method includes: closing a MySQL database by means of clearing inactive rollback data during closing; based on an original system table space file of rollback space to be reclaimed, generating a new system table space file not including the rollback space; replacing the original system table space file with the new system table space file. The invention further discloses a device for quickly reclaiming the rollback space in MySQL. The rollback space in MySQL can be quickly reclaimed by the method; availability of the whole database system is improved.

The invention provides a data security access method based on a block chain in a federated learning environment, and mainly solves the problem that a user does not have a complete control right to owndata in existing federated learning. The method comprises the implementation steps of 1) performing initialization operation on a blockchain, a smart contract and a KGA; 2) the user performs local training on the data, stores the trained data by using IPFS, encrypts the data through CP-ABE, and uploads the encrypted data to a deployed blockchain; 3) the server interacts with the KGA to obtain theuser uploaded data of the required version for centralized training, and updates the final data after training to the blockchain; and 4) the user acquires final data uploaded by the server and updates the local training model according to the data information.The learning process of the method is open and transparent, the control right of the user on the own data is ensured, data backtracking andmodel rollback can be conveniently performed, and version management is facilitated.

The invention provides a project version release management method. The method comprises the steps of packaging a target code of a to-be-released project update version to obtain a target resource packet; uploading the target resource packet to a test server for testing; uploading the target resource packet to a version release server for verification after the test is passed, and releasing a project update version after the verification is passed; and monitoring the published project update version, generating a rollback strategy according to the received feedback data and a preset priority label, and determining and re-publishing a target rollback version according to the rollback strategy. The invention provides a management system for project version release. According to the method, the target resource packet is directly uploaded to the version release server from the test server, so that the consistency of the target resource packet from test to production verification is ensured; the error rate is reduced and the efficiency is improved; and a customized rollback strategy is generated according to the real-time feedback data, so that quick release of a project rollback version is facilitated, continuous operation of the project is facilitated, and the user experience is improved.

The embodiment of the invention provides a transaction processing method, a device and equipment. The method comprises the steps: a transaction request transmitted by terminal equipment of a first user is received; wherein the transaction request comprises transaction information of transaction between a first user and a second user, and related record information of the transaction is stored in blockchain; transaction elements associated with the transaction is determined according to the transaction information; locking processing on the determined transaction elements is carried out; and ifthe locking processing fails, transaction rollback processing is carried out and transaction failure information is sent to the terminal device of the first user.

The invention discloses a method and a system for storing snapshots in combination with Kubernetes and Ceph. The method belongs to a data snapshot storage technology. The technical problem to be solved by the invention is how to perform snapshot on data stored in Ceph in Kubernetes, so that rollback can be realized when the data is dirty or snapshot recovery can be realized when the data is damaged, and the technical scheme comprises the following steps: S1, defining a group of snapshot interfaces; S2, defining the VolmeSnapshot of the resource type self-defined by the user as the extension ofthe existing resource type of the Kubernetes; S3, creating a VolmeSnapshot resource description file, appointing PVC (Polyvinyl Chloride) needing snapshot in the description file, and initiating a creation request, wherein the type of the PVC is VolmeSnapshot; And S4, when the Kubernetes receives the snapshot creation request, responding through the snapshot creation interface defined in the stepS1. The invention also discloses a system for storing snapshots in combination with Kubernetes and Ceph.

The invention discloses an automatic upgrading and rollback method and device for Internet-of-things equipment. The method comprises the following steps: acquiring an upgrade package on line so as todownload the upgrade package to a storage space of the Internet-of-things equipment; restoring the upgrade package into an update version required by upgrading in the storage space, and retaining original data required by rollback to an original version; and under the condition that it is judged that upgrading fails, performing rollback of firmware of the Internet-of-things equipment to the original version in the storage space at least based on the reserved original data. According to the OTA upgrading and rollback scheme provided by the invention, the data required for recovering the original version are reserved on the equipment while the version is prepared to be updated, so that the problem of equipment failure caused by the fact that new and old firmware versions cannot be started atthe same time due to an upgrading fault can be effectively solved.

The invention discloses an interactive method based on command line data of a network management system. The method comprises the following steps: converting a network management data model into a command line configuration block; packaging the command line data, and transmitting the command line data to a network device; caching and executing the command line data in batches by the network device; and carrying out rollback on a network management error. According to the invention, the data of the network management system is converted into the command line configuration blocks in batches, and an error rollback mode is supported, in this way, the interaction times of the network management system and the network device are decreased, meanwhile the downloading state maintenance difficulty of the network management data model is reduced, and the network management system is supported to simultaneously release multiple items of data command line configuration blocks; the network management system adds an error rollback mark in the command line to ensure the execution transaction of the data command line configuration blocks, once an execution failure occurs, the original operation on the network device is cancelled by an effective reverse operation; and the network management system optimizes the Telnet echo character, reduces the redundant data and simplifies the data returned to the network management system.

The invention discloses a method for guaranteeing the consistency of cross-blockchain transactions of a blockchain, and the method achieves the cross-blockchain operation through the proxy node of theblockchain, achieves a decentralized cross-blockchain scheme through registration management, is substantially different from a mode of a relay blockchain or a notarian, and meets the demands of thedecentralized management of the blockchain. In order to ensure the consistency of cross-blockchain transactions, a cross-blockchain transaction lock scheme is designed and comprises transaction locking, transaction submission rollback and other processes, and a distributed transaction mechanism is realized in combination with a hash time lock; the transaction locking function is realized in combination with a smart contract, when the cross-blockchain transaction interface is realized, the transaction locking capability is packaged as the underlying capability, and a user does not need to manually process a transaction control contract during cross-blockchain operation, so that the usability and the stability are improved, and the error probability is reduced. The invention further providesa data integrity and existence design.

The invention discloses a transaction consistency achieving method and a transaction consistency achieving system for an isomerous data compound object. The method comprises the following steps: S1, starting, S2, preparation, and S3, execution. The step S1 of starting comprises: initiating a transaction request: providing various different types of data sources, and requesting transaction processing on the data sources; setting basic information of transactions to be processed; the step S2 of preparation comprises: preprocessing the transactions: respectively altering data of each data source of each transaction to obtain an initial processing result; storing progress information of the transaction: acquiring and storing information of each process in the transaction processing process; the step S3 of execution comprises: checking all progress states of the transaction in sequence; judging whether all the transaction progresses are successful: finally altering and submitting the data according to altering results, or performing data rollback. According to the transaction consistency achieving method and the transaction consistency achieving system for the isomerous data compound object, the transaction consistency of the isomerous data compound object is maintained.

The invention provides a method, system and device for modifying data in a block chain and a storage medium. The method comprises the steps: initiating whole network voting when a supervision device detects to-be-changed data, determining a first node device responsible for modifying the to-be-changed data according to a voting record, and generating a bifurcation mark, and sending the bifurcation flag, the corrected data corresponding to the to-be-changed data and the block height to the first node equipment. The first node equipment performs rollback on the block chain corresponding to the data to be changed to generate a new block; storing the new block on a block chain corresponding to the to-be-changed data to form a bifurcated chain; and performing rollback on each block of which the block height on the old chain is greater than the block height of the new block in the bifurcated chain, and storing each rollback block on the new chain of the bifurcated chain until the new chain pursues the old chain. And the second node equipment executes the transaction corresponding to the block chain to generate a block, and stores the generated block on the new chain. According to the method and the device, wrong input data can be modified, and data modification is guaranteed to be fair and public.

The embodiment of the invention provides a distributed transaction implementation method and device. The method comprises the following steps: executing a branch transaction according to a pre-configured proxy data source, and writing an operation record of the branch transaction into a MySQL binlog log; registering the branch transaction, and releasing the resource lock of the branch transaction.According to the distributed transaction implementation method and device, by writing the operation record of the branch transaction into the MySQL binlog log log, registering the branch transactionand releasing the resource lock of the branch transaction, the resource locking time can be reduced under the condition that rollback can be realized, and the system performance is not obviously reduced when a global transaction is realized. And the agent data source is configured in advance, so that the implementation process of the whole distributed transaction does not invade the original system service code, and the system performance is not obviously reduced when the global transaction is implemented.

The invention discloses a concurrent access control method in a distributed database system. According to the invention, the transaction number is generated by using the timestamp of the client and the hardware unique identifier. And when the read-only transaction accesses a certain row of data for the first time, reading the latest submitted version of the row of data, and recording the transaction number of the version in the client to provide evidences for repeated access. And when the read-write transaction reads a certain row of data, reading the latest submitted version of the row of data, and adding a read lock of the row in a memory of a node where the row is located. And when the read-write transaction updates a certain row of data, caching the transaction number of the current version of the row and the updated content in the client. When the affairs are submitted, the updated content is sent to the corresponding node, whether updating is feasible or not is determined according to the current state of the line, and when waiting or rollback is needed, one affair rolls back according to the sequence relation of the affair numbers. According to the invention, deadlock detection with extremely high cost in a distributed environment is avoided, and high concurrency and high consistency are obtained.

The invention is suitable for the technical field of application testing, and provides a gray release method and device, and the method comprises the steps: receiving a service request transmitted byterminal equipment, wherein the service request is triggered by a user in a front-end application of terminal equipment, and the service request comprises application version information of the front-end application; if the service request further comprises a gray scale identifier, and the gray scale identifier is a first preset value, determining that the user belongs to a gray scale environment,and determining back-end service version information corresponding to the service request according to the application version information; and sending the business request to a gray scale server with a first target service version, wherein the first target service version is a back-end service version corresponding to back-end service version information. According to the invention, the reliability of a gray scale test result is improved, and the rollback probability after application production is online is further reduced.