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42 results about "Two-phase commit protocol" patented technology
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In transaction processing, databases, and computer networking, the two-phase commit protocol (2PC) is a type of atomic commitment protocol (ACP). It is a distributed algorithm that coordinates all the processes that participate in a distributed atomic transaction on whether to commit or abort (roll back) the transaction (it is a specialized type of consensus protocol). The protocol achieves its goal even in many cases of temporary system failure (involving either process, network node, communication, etc. failures), and is thus widely used. However, it is not resilient to all possible failure configurations, and in rare cases, manual intervention is needed to remedy an outcome. To accommodate recovery from failure (automatic in most cases) the protocol's participants use logging of the protocol's states. Log records, which are typically slow to generate but survive failures, are used by the protocol's recovery procedures. Many protocol variants exist that primarily differ in logging strategies and recovery mechanisms. Though usually intended to be used infrequently, recovery procedures compose a substantial portion of the protocol, due to many possible failure scenarios to be considered and supported by the protocol.
Transaction processing system providing improved methodology for two-phase commit decision
InactiveUS6799188B2Improve performanceImprove system performanceData processing applicationsMultiple digital computer combinationsImproved methodTransaction processing system
A transaction processing system providing improved methodology for invoking two-phase commit protocol (2PC) is described. More particularly, a transaction is handled without use of 2PC until the system determines that the transaction does, in fact, involve changes to more than one database. The methodology improves overall system performance by looking at each transaction to determine whether the transaction actually requires use of 2PC before incurring the overhead associated with use of the two-phase commit protocol. Because only a small percentage of real world transactions result in updates to more than one database, the methodology improves the overall performance of transaction processing systems considerably.
Owner:BORLAND
Transaction processing system providing improved methodology for two-phase commit decision
InactiveUS20030046298A1Improve performanceImprove system performanceData processing applicationsMultiple digital computer combinationsImproved methodTransaction processing system
A transaction processing system providing improved methodology for invoking two-phase commit protocol (2PC) is described. More particularly, a transaction is handled without use of 2PC until the system determines that the transaction does, in fact, involve changes to more than one database. The methodology improves overall system performance by looking at each transaction to determine whether the transaction actually requires use of 2PC before incurring the overhead associated with use of the two-phase commit protocol. Because only a small percentage of real world transactions result in updates to more than one database, the methodology improves the overall performance of transaction processing systems considerably.
Owner:BORLAND
System and method for supporting mixed-phase transactions in an object-oriented environment
A system, method, and apparatus for ensuring data integrity in a distributed object-oriented transaction processing environment, including support of single- and two-phased commit protocol transactions with a new protocol defined as a mixed-phase commit protocol. A root transaction manager on a server registers distributed object resources requested by a client application for a global transaction as being committable by either the single-phase, two-phase, or mixed-phase protocol. The root transaction manager commits the registered resources in accordance with the results of the registration step.
Owner:IBM CORP
System and method for supporting XA 2-phase commit protocols with a loosely coupled clustered database server
InactiveUS20050144299A1Eliminate needRelational databasesMultiple digital computer combinationsDatabase serverRunning time
Indoubt transaction entries are recorded for each member of a database cluster, thereby avoiding the CPU cost and elapsed-time impact of persisting this information to a disk (either via a log write or a relational table I / O). This implementation allows for full read / write access and data coherency for concurrent access by all the members in the database cluster. At any given point in time, a full list of indoubt transactions is maintained for the entire database cluster in a relational table (e.g., an SQL table).
Owner:IBM CORP
Distributed transaction security method for memory data grid
ActiveCN103473318AEasy to form a single point of bottleneckAvoid single point bottlenecksSpecial data processing applicationsThird partyData operations
Owner:北京达梦数据库技术有限公司
One-phase commit in a shared-nothing database system
ActiveUS6845384B2Data processing applicationsResource allocationTwo-phase commit protocolShared database
Techniques are provided for handling distributed transactions in shared-nothing database systems where one or more of the nodes have access to a shared persistent storage. Rather than coordinate the distributed transaction using a two-phase commit protocol, the coordinator of the distributed transaction uses a one-phase commit protocol with those participants that have access to the transaction status information maintained by the coordinator. The transaction status information may reside, for example, in the redo log of the coordinator. In the case that the coordinator fails, those participants can determine the state of the distributed transaction based on information stored on the shared disk. In addition, the coordinator is able to determine whether it is possible to commit the distributed transaction based on information that is stored on the shared disk by the participants, without those participants entering a formal “prepared” state.
Owner:ORACLE INT CORP
Two-phase commit with queryable caches
InactiveUS7401084B1Database distribution/replicationSpecial data processing applicationsDistributed computingTwo-phase commit protocol
An optimization of the two-phase commit protocol employed in distributed systems. Each cohort component of the distributed system augments messages that are accessible to the coordinator component with state information indicating whether the cohort is read-only with regard to a transaction that the coordinator is coordinating. The coordinator retains the most recent state information. The coordinator reads the retained state information for the cohorts and when the transaction terminates, the coordinator reads the retained state information. Where the cohort's state is read-only, the coordinator simply sends an abort message instead of performing the full two-phase commit protocol with regard to the read-only cohort. In the trees of distributed system components that are defined by transactions, any cohort which has children in the tree is a local coordinator for its children. The general technique of cohorts augmenting messages accessible to a coordinator with state information that is relevant to an action to be performed by the coordinator and the coordinator acting in accordance with state retained from the messages has other uses as well.
Owner:ORACLE INT CORP
Transactional archiving of an electronic document
ActiveUS20110035356A1Digital data information retrievalMemory loss protectionElectronic documentEngineering
Various methods and apparatus are described for archiving of an electronic document between multiple interconnected archive units of a distributed server network in geographically-dispersed locations in order to store identical copies of the electronic document at the same time. An archival portal server in the distributed server network sends a five-step, two-phase commit protocol to a selected set of two or more transaction manager instances resident on remote archive units. The archival system reconciles if an error occurs between a start of a transmission of the electronic document and a permanent archiving of that electronic document, or the electronic document is stored in a permanent data storage location within each of the archive units at an end of the two-phase commit protocol making archiving of an electronic document to multiple locations an atomic operation.
Owner:LONGSAND
Method for strategizing protocol presumptions in two phase commit coordinator
ActiveUS20060174224A1Digital data processing detailsSpecific program execution arrangementsTransaction processing systemRecovery procedure
A transaction processing system provides the capability to use one two-phase commit engine over multiple protocols and products, while being able to vary the log presumptions according to the requirements of each protocol and product. The transaction processing system comprises a coordinator operable to receive a commit or abort request from a transaction and to perform a two-phase commit protocol on behalf of the transaction and a recovery presumption mechanism operable to perform a recovery process on the transaction upon recovery of the transaction processing system from a failure.
Owner:ORACLE INT CORP
Distributed transaction committing failure handling method, device and system
InactiveCN103559245AImplement automatic repairGuaranteed atomicityDatabase distribution/replicationTransmissionReal-time computingTwo-phase commit protocol
An embodiment of the invention provides a distributed transaction committing failure handling method and device. The method includes the steps: recording the state of a distributed transaction as an unfinished state by a first node after committing the distributed transaction at a first stage; transmitting a transaction state query request including the sign of the distributed transaction to a second node according to the recorded unfinished state of the distributed transaction after the first node fails or network connection between the first node and the second node fails and failure recovers; repairing the distributed transaction at a second stage according to the state of the distributed transaction returned by the second node. By the method, the problem that the distributed transaction cannot be automatically repaired when second-stage committing failure of the distributed transaction occurs can be solved, and atomicity and uniformity of the distributed transaction are ensured.
Owner:HUAWEI TECH CO LTD
Method and a system for performing a two-phase commit protocol
InactiveUS20110078516A1Resource allocationFault responseResource managementProtocol for Carrying Authentication for Network Access
The invention provides an enhanced two phase commit process to perform a transaction started by an application program and involving access to one or more resources managed by respective resource managers. The method comprises the steps of:enlisting the resource managers participating in the transaction, said enlisting step including associating a priority rank with each identified resource manager based on predefined priority rules; sending a prepare signal to said enlisted resource managers to begin the process of committing the transaction; and if a ready signal is received from all resource managers in response to the prepare signal, committing the resource managers in the order defined from the priority ranks associated with the resource managers.
Owner:IBM CORP
Method and a system for performing a two-phase commit protocol
The invention provides an enhanced two phase commit process to perform a transaction started by an application program and involving access to one or more resources managed by respective resource managers. The method comprises the steps of: enlisting the resource managers participating in the transaction, said enlisting step including associating a priority rank with each identified resource manager based on predefined priority rules; sending a prepare signal to said enlisted resource managers to begin the process of committing the transaction; and if a ready signal is received from all resource managers in response to the prepare signal, committing the resource managers in the order defined from the priority ranks associated with the resource managers.
Owner:IBM CORP
Method for guaranteeing data final consistency through system based on micro-service framework
InactiveCN107861823APerformance advantageVersatilityInterprogram communicationSpecial data processing applicationsMessage queueService development
The invention relates to the technical field of micro-service development, in particular to a method for guaranteeing the data final consistency through a system based on a micro-service framework. Through the combination of a method using a message queue and the determination and retransmission mechanism of messages, final consistency can be achieved after automatic or manual compensation; modules related to the final data consistency include an upstream application for executing service and sending MQ messages, a reliable message service and message assembly for coordinating with the transmission of downstream messages and ensuring the consistency of upstream data and downstream data, and a downstream application for monitoring the MQ messages and executing service. The problems that traditional two-stage protocol submitting performance is poor and a processing chain is long are solved.
Owner:G CLOUD TECH
Method for transaction processing with parallel execution
ActiveUS7640535B2Shorten the timeDigital data processing detailsMultiprogramming arrangementsTransaction processing systemOperating system
A method for using available server threads to process resources and reduce the overall time of performing XA interactions in two-phase commit protocol implemented by the transaction manager. A TM processing XA interactions dispatches interaction commands for multiple resources to a thread manager, which dispatches the commands to idle server threads. In one embodiment, the TM attempts to dispatch all but one of the interaction commands to separate threads. The primary thread then processes the remaining resource command. Any commands relating to dispatch requests that were unable to be dispatched to separate threads due to unavailability are processed by the primary thread. Once the primary server has processed its interaction commands and received a signal indicating the threads receiving dispatch requests have completed their respective processing of dispatched commands, the next group of commands is processed in a similar manner.
Owner:ORACLE INT CORP
Parallel transaction execution with a thread pool
ActiveUS20100100624A1Shorten the timeDigital data processing detailsMultiprogramming arrangementsOperating systemThread pool
A method for using available server threads to process resources and reduce the overall time of performing XA interactions in two-phase commit protocol implemented by the transaction manager. A TM processing XA interactions dispatches interaction commands for multiple resources to a thread manager, which dispatches the commands to idle server threads. In one embodiment, the TM attempts to dispatch all but one of the interaction commands to separate threads. The primary thread then processes the remaining resource command. Any commands relating to dispatch requests that were unable to be dispatched to separate threads due to unavailability are processed by the primary thread. Once the primary server has processed its interaction commands and received a signal indicating the threads receiving dispatch requests have completed their respective processing of dispatched commands, the next group of commands is processed in a similar manner.
Owner:ORACLE INT CORP
Distributed flash memory transaction processing method
ActiveCN105005535AImprove processing efficiencyReduce write volumeMemory architecture accessing/allocationInput/output to record carriersDatabaseMetadata record
The invention discloses a distributed flash memory transaction processing method. The method comprises the following steps: S1, carrying out two-phase commit on a transaction, wherein state log records of the two-phase commit protocol are removed and internalized as flash memory metadata operations in interfaces of the transaction, and the end of the distributed transaction is marked with the final commit of a coordinator; S2, during the process of the transaction, storing a data temporary object as a shadow version, wherein a shadow mapping table is used for storing the address of the shadow version or the state of a page in the transaction processing, metadata of the page is used for recording information of the transaction, a transaction metadata page is used for recording the state of the transaction and a transaction state table is used for recording the address of the transaction metadata page; and S3, when the coordinator or a participant has a fault, scanning a part of the memory, reading the flash memory metadata and restoring an FTL mapping table, the shadow mapping table and the transaction state table so as to determine the state of the transaction during the two-phase commit. The distributed flash memory transaction processing method disclosed by the invention has the following advantages that the logs are decreased and the transaction processing efficiency under the distributed flash memory environment is improved.
Owner:TSINGHUA UNIV
Systems and methods for semi-durable transaction log storage in two-phase commit protocol transaction processing
ActiveUS20150248308A1Digital data information retrievalDigital data processing detailsTransaction logSystem failure
Systems and methods are provided for semi-durable transaction log storage in a two-phase commit protocol transaction processing. An exemplary method includes receiving a distributed transaction comprising a plurality of processes for processing, wherein the processing uses a two-phase commit protocol and preparing, by a main coordinator, at least one participant comprising at least one of the plurality of processes to prepare for execution by the at least one participant. The method further includes receiving, by the main coordinator, information comprising prepared processes of the at least one of the plurality of processes and storing, by the main coordinator, a transaction log comprising the at least one participant and the information to a semi-durable storage. The semi-durable storage may comprise a crash-proof storage that survives system failure. Thus, the semi-durable storage may write the transaction log to the durable storage if there is a system failure.
Owner:RED HAT
Reducing occurrences of two-phase commits in a multi-node computing system
InactiveUS7921220B2Reduce in quantityMultiple digital computer combinationsTransaction processingNODALPhases of clinical research
Techniques are disclosed for reducing the number of two-phase commits required to perform atomic transactions in a multi-node system. By monitoring atomic operations that require two-phase commit protocols, a system may identify when it would be beneficial to consolidate data onto single (or at least fewer) compute node(s). In doing so, a less compute intensive commit protocol, such as a one-phase commit protocol may be used. Moreover, in situations where data consolidation is not available, the data may be migrated to compute nodes having a closer proximity. Thus, in such cases, network response times for two-phase commits required for an atomic operation may be reduced, thereby increasing the performance of a multi-node system.
Owner:INT BUSINESS MASCH CORP
Method for strategizing protocol presumptions in two phase commit coordinator
ActiveUS8271448B2Digital data processing detailsSpecific program execution arrangementsTransaction processing systemPhases of clinical research
A transaction processing system provides the capability to use one two-phase commit engine over multiple protocols and products, while being able to vary the log presumptions according to the requirements of each protocol and product. The transaction processing system comprises a coordinator operable to receive a commit or abort request from a transaction and to perform a two-phase commit protocol on behalf of the transaction and a recovery presumption mechanism operable to perform a recovery process on the transaction upon recovery of the transaction processing system from a failure.
Owner:ORACLE INT CORP
Distributed transaction processing system
PendingCN113391885ARealize that reading and writing do not block each otherLower latencyDatabase updatingProgram synchronisationConcurrency controlInterface (computing)
The invention discloses a distributed transaction processing system which comprises a computing layer, a storage layer and a scheduling layer. The computing layer is used for receiving an SQL request of a client, converting the SQL request into a KV read-write request, transmitting the KV read-write request to the storage layer, and initiating two-stage transaction submission based on the SQL request, wherein the storage layer is used for providing a read-write interface for two-stage transaction submission initiated by the calculation layer and providing storage service; and the scheduling layer is used for maintaining meta-information of the whole cluster, including KV data distribution information and the like, providing global time service for the computing layer and the storage layer, and storing distributed information submitted in two stages of transactions. When the transaction is submitted, the transaction is submitted through a two-stage submission protocol, and a multi-version concurrency control mechanism is adopted, so that mutual blocking of reading and writing is avoided.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Systems and methods for communicating information of participants registered with a sub-coordinator during distributed transaction processing
InactiveUS9667475B2Multiple digital computer combinationsData switching networksComputer scienceReal-time computing
Systems and methods are provided for prepare list communication to participants in a two-phase commit protocol transaction processing. An exemplary method includes receiving a distributed transaction for processing, wherein the processing uses a two-phase commit protocol, receiving a distributed transaction comprising a plurality of processes for processing, wherein the processing uses a two-phase commit protocol and preparing, by a main coordinator, at least one participating processing node from the plurality of processes, wherein the at least one participating processing node comprises a first sub-coordinator and a first participant, and wherein the first participant executes a first process of the plurality of processes. The method further includes receiving, by the main coordinator, a first list comprising the first participant registered with the first sub-coordinator. The method may further include contacting, by the main coordinator, the first participant using the first list, in the event of system or first sub-coordinator failure.
Owner:RED HAT
Method for processing distributed transactions in distributed database system
ActiveCN111209093AImprove performanceReduce the probability of conflictProgram synchronisationDatabase distribution/replicationParallel computingEngineering
The invention discloses a method for processing distributed transactions in a distributed database system. The method is based on analysis of an existing strict two-stage blocking protocol and an existing two-stage submitting protocol. In order to overcome the influence of overlong lock holding time in a distributed transaction execution process, lock resources are released in advance in a transaction preparation stage in a two-stage submission protocol, and the sequence of submission and rollback of transactions is determined by maintaining submission dependency relationship information of the transactions, so that transaction exception is avoided, and the correctness of the transactions is ensured. According to the invention, the lock holding time of distributed transactions is effectively shortened, the conflict rate between the transactions is reduced, and the transaction processing performance is improved.
Owner:EAST CHINA NORMAL UNIV
Systems and methods for communicating information of participants registered with a sub-coordinator during distributed transaction processing
Systems and methods are provided for prepare list communication to participants in a two-phase commit protocol transaction processing. An exemplary method includes receiving a distributed transaction for processing, wherein the processing uses a two-phase commit protocol, receiving a distributed transaction comprising a plurality of processes for processing, wherein the processing uses a two-phase commit protocol and preparing, by a main coordinator, at least one participating processing node from the plurality of processes, wherein the at least one participating processing node comprises a first sub-coordinator and a first participant, and wherein the first participant executes a first process of the plurality of processes. The method further includes receiving, by the main coordinator, a first list comprising the first participant registered with the first sub-coordinator. The method may further include contacting, by the main coordinator, the first participant using the first list, in the event of system or first sub-coordinator failure.
Owner:RED HAT
Method for ensuring data consistency under micro-service framework HTTP interaction mode
InactiveCN108038141APerformance advantageSuitable for useSpecial data processing applicationsProtocol for Carrying Authentication for Network AccessComputer science
The invention relates to the technical field of micro-service development, in particular to a method for ensuring the data consistency under a micro-service framework HTTP interaction mode. The methodincludes the steps of calling pre-operations of all auxiliary business service through a main business service, recording all the auxiliary business service in a movement manager, continuing the business if the pre-operations of all the auxiliary business service succeed or the pre-operation of a certain auxiliary business service fails, otherwise, stopping executing the execution business, if the pre-operations of all the auxiliary business service succeed, calling confirming operations of all the auxiliary business server through a collaborator, rolling back all the confirming operations and executing canceling operations of the auxiliary business service if the confirming operations fail, calling the canceling operations of all the auxiliary business service if the pre-operations of part of auxiliary business service fail till canceling succeeds. The problem that a traditional two-stage submitted protocol is poor in performance and not suitable for a micro-service framework is solved, and the three simple semantic operations on the business service can be achieved and called.
Owner:G CLOUD TECH
Systems and methods for semi-durable transaction log storage in two-phase commit protocol transaction processing
ActiveUS10474493B2Database updatingSpecial data processing applicationsTransaction logSystem failure
Systems and methods are provided for semi-durable transaction log storage in a two-phase commit protocol transaction processing. An exemplary method includes receiving a distributed transaction comprising a plurality of processes for processing, wherein the processing uses a two-phase commit protocol and preparing, by a main coordinator, at least one participant comprising at least one of the plurality of processes to prepare for execution by the at least one participant. The method further includes receiving, by the main coordinator, information comprising prepared processes of the at least one of the plurality of processes and storing, by the main coordinator, a transaction log comprising the at least one participant and the information to a semi-durable storage. The semi-durable storage may comprise a crash-proof storage that survives system failure. Thus, the semi-durable storage may write the transaction log to the durable storage if there is a system failure.
Owner:RED HAT
Reducing occurrences of two-phase commits in a multi-node computing system
InactiveUS20100180024A1Reduce in quantityMultiple digital computer combinationsTransaction processingComputing systemsAtomic operations
Techniques are disclosed for reducing the number of two-phase commits required to perform atomic transactions in a multi-node system. By monitoring atomic operations that require two-phase commit protocols, a system may identify when it would be beneficial to consolidate data onto single (or at least fewer) compute node(s). In doing so, a less compute intensive commit protocol, such as a one-phase commit protocol may be used. Moreover, in situations where data consolidation is not available, the data may be migrated to compute nodes having a closer proximity. Thus, in such cases, network response times for two-phase commits required for an atomic operation may be reduced, thereby increasing the performance of a multi-node system.
Owner:IBM CORP
Transaction processing system and transaction method for Web service
InactiveCN100561920CGuaranteed atomicityEnsure consistencyData switching networksWeb serviceThe Internet
Owner:BEIHANG UNIV
Message ordering in a messaging system
InactiveUS7580979B2Digital data information retrievalMultiple digital computer combinationsProtocol processingHandling system
A messaging handling system implements the well-known Two-Phase Commit protocol (comprising prepare and commit operations) to store messages related to transactions in a repository, but enforces message ordering. The commit operation is divided into two phases: a commit phase and a release phase. Prepare requests are implemented conventionally. Commit requests are implemented by immediately executing the commit phase of the operation, but delaying release of the message for reading from the repository until all prepare requests received prior to an instant request have released. In this manner, message ordering is preserved, while allowing use of conventional two-phase commit protocol processing.
Owner:INT BUSINESS MASCH CORP
Registering a resource that delegates commit voting
InactiveUS7818429B2Digital data information retrievalMultiple digital computer combinationsComputerized systemDistributed computing
A computer system and storage medium that, in an embodiment, receive an allocation request for a resource and registers the resource as a non-voting participant if the resource desires to delegate commit voting to another resource. The registered resource is then prohibited from participating in an enclosing transactional context and instead is informed when the transaction completes. The resource is enlisted as a voting participant if the resource does not desire to delegate commit voting. In this way, when multiple resources are used in a transaction, a resource may be registered and receive notifications of transaction completion instead of being enlisted and voting on commit decisions. The result of a transaction in which a single resource takes responsibility for a number of other resources is that transaction completion avoids the two-phase commit protocol and the resulting performance degradation.
Owner:IBM CORP
Mechanism for implementing different types of services within the same two-phase commit transaction
InactiveUS7644411B1Improve performanceMultiple digital computer combinationsSpecific program execution arrangementsApplication softwareType of service
An apparatus for and method of permitting a CORBA user terminal to request services from an enterprise server having XATMI applications, wherein the process is controlled by an integrated two-phase commit protocol. The service request is generated and transmitted to a server. The user terminal transmits a prepare. When the server acknowledges the prepare, a log entry is made. The user terminal transfers a commit which when acknowledged by the server causes deletion of the log entry. Each of the request / acknowledge communications is performed in both CORBA and XATMI protocols.
Owner:UNISYS CORP
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