7 results about "Sequential consistency" patented technology

The present storage solution provides an order of operations of a computer-implemented method for performing transient failure handling with an improved application I / O resumption time for a symmetric distributed storage system; an order of operations of a computer-implemented method for performing persistent failure handling with an improved application I / O resumption time for a symmetric distributed storage system; an order of operations of a computer-implemented method for performing transient failure handling with an improved application I / O resumption time to maintain dependent write order consistency for a symmetric distributed storage system; an order of operations of a computer-implemented method for performing secondary side write Op handling to maintain dependent write order consistency for a symmetric distributed storage system; and an order of operations of a computer-implemented method for performing secondary side read Op handling to maintain dependent write order consistency for a symmetric distributed storage system in accordance with some embodiments.

The application discloses a cross-clock domain register synchronization method and device. It relates to the technical field of digital integrated circuit design. The method comprises the following steps: when the target clock domain is unavailable, routing the bus read-write request to a shadow register array driven by a system clock, and writing a write transaction log into a log queue when the write transaction is completed, the write transaction log comprising a target address, write data and byte enable; when the target clock domain changes from unavailable to available and the log queue is not empty, setting the handshake signal of the bus interface to invalid, reading the write transaction log from the log queue according to the write sequence, and writing the write data into the target register through a byte mask circuit according to the target address in the write transaction log; when the target clock domain is available and the log queue is empty, routing the bus read-write request to the target register, and setting the handshake signal of the bus interface to valid. The method realizes register access integrity and sequential consistency in the target clock dynamic change scenario.

The invention discloses a distributed flow collection method and device based on edge computing and a medium, and relates to the technical field of network communication, and the method comprises the steps: combining a collection task description mechanism uniformly issued by a cloud end with a dynamic scheduling and parameter self-adaption mechanism of an edge node side; the full-flow closed-loop control of the acquisition task from definition, matching, scheduling, execution to feedback optimization is realized, the sequence consistency of the same session flow in the processing process is effectively maintained by combining the sequence keeping mark with a session-based subqueue mechanism, the problem of data disorder caused by preemptive scheduling is avoided, and the processing efficiency is improved. The accuracy of flow feature extraction and subsequent analysis results is improved, and continuous correction and self-adaptive optimization of estimated processing time and safety coefficients are realized by performing hierarchical degradation processing on non-dispatchable acquisition jobs and overtime acquisition jobs and combining an extremely simple degradation report and a partially completed degradation report mechanism.

Sequential consistency across a distributed cloud computing network is described. A database includes a primary database and multiple read replica databases. Write queries are transmitted to the primary database, and commit tokens are provided to the read replica databases and the clients. Commit tokens are included in requests from clients. If a request for a read operation received at a read replica database does not include a token that is later than a commit token of the most recent update to the read replica database, the read operation is served by the primary database. If a request for a read operation received at a read replica database includes a token that is later than a commit token of the most recent update to the read replica database, the read replica database delays servicing the read update until it receives an update from the primary database with an updated commit token.

The invention provides a high-performance parallel block chain method and system for stable currency. The method comprises the following steps: S1, layering a system architecture; s2, realizing parallel block production and pipelined voting of multiple suggestors in combination with role setting; s3, determining a certificate QC through an aggregation signature construction method, and implementing a two-round voting submission rule; s4, implementing a consensus process; s5, based on the key value storage model of the multi-version state, performing dynamic switching between transaction execution and transaction verification; s6, optimistic parallel control and multi-version state management are adopted, and scheduling and execution of an LEAP execution engine are achieved; s7, executing a state fragmentation mechanism in the high-concurrency hotspot scene; and S8, establishing an interface constraint and cooperation mechanism between the consensus layer and the execution layer. According to the method, an MP3-BFT protocol, an LEAP execution engine and a state fragmentation mechanism can be combined, approximately linear throughput expansion is achieved, a large amount of rollback and retry overhead are effectively avoided, the probability of write conflicts is reduced, and sequence consistency is ensured.

The application provides a time synchronization method of a tree type FC network, comprising the following steps: establishing a tree type FC network; each boundary clock device realizes time synchronization with a master clock source through a time synchronization strategy; each slave clock device connected to the same boundary clock device realizes time synchronization with the connected boundary clock device through the time synchronization strategy. Through the delay measurement of FC over PON and the time synchronization primitive exchange mode, all FC storage nodes can keep nanosecond-level time synchronization, and through the carry chain fine time synchronization, the synchronization accuracy of the FC storage nodes can be improved to picosecond level, so that the data write sequence consistency in the distributed storage can be ensured, and the data conflict caused by the time inconsistency can be avoided.

The invention discloses a multi-field linkage state machine system for describing a complex business scene, and belongs to the technical field of brokerage transaction systems. According to the system, a state machine and a process definition are loaded through a configuration analyzer; the filler converts the external request into an internal event and fills the corresponding configuration; the event queue router routes the event to a fixed working thread queue according to the service identifier so as to ensure the sequence; the working thread pool concurrently executes events; the process execution engine executes the process in the event; and the multi-field state machine management center drives state circulation, and automatically generates and triggers a linkage event associated with the state machine when the state change triggers a linkage condition, thereby realizing the linkage of the multi-field state machine. According to the method and the system, through a modularized and configured architecture and in combination with an assemblable thread queue model, the technical problems that a state machine in a brokerage transaction system is complex in management, difficult to link and difficult to consider concurrency performance and sequence consistency are solved, and high development efficiency, high maintainability and high expandability are realized.