dtc transaction

TRANSACTION decrements the @ @TRANCOUNT by 1 and the transaction remains active.If the committed transaction is a Transact-SQL distributed transaction, commit TRANSACTION will trigger MS DTC to use the two-phase commit protocol t

namespaces contain classes dedicated to managing database transactions, respectively, the System.Data.SqlClient.SqlTranscation class and the System.Data.OleDb.OleDbTranscation class.Like their names, most of these two classes are functionally the same, and the main difference is their connection mechanism, which provides a set of objects that call SQL Server directly, and the latter uses native OLE DB to enable data access. In fact, ado.net transactions are handled entirely within the database

where uid = '000000 '"; Cmd. executenonquery (); Cmd. commandtext = "Update B _user set balance = balance + 10000 where uid = '000000 '"; Cmd. executenonquery (); Contextutil. setcomplete (); // call COM + context to submit data Return true; } Catch (exception ex) { Contextutil. setabout (); // call COM + context rollback transaction Return false; } } } } Code and use ADO. net implements very similar

The deepest cause of all deadlocks is: resource competition performance 1:A user a accesses Table A (locking table A) and then accesses Table BAnother user B accesses table B (Table B is locked) and then attempts to access Table At this time, user a has locked table B because user B has to wait for user B to release table B to continue. Well, the old man will have to wait honestly.Similarly, user B has to wait for user a to release Table A to continue.Solution:This deadlock is caused by bugs in

In fact, the deepest reason for all deadlocks is: resource competition performance 1:A user a accesses Table A (locking table A) and then accesses Table BAnother user B accesses table B (Table B is locked) and then attempts to access TableAt this time, user a has locked table B because user B has to wait for user B to release table B to continue. Well, the old man will have to wait honestly.Similarly, user B has to wait for user a to release Table A to continue.Solution:This deadlock is caused b

Comprehensive analysis of Spring's programmatic transaction management and declarative transaction managementBefore you start about this tutorialThis tutorial will delve into Spring's simple and powerful transaction management capabilities, including programmatic and declarative transactions. By learning this tutorial, you will be able to understand the nature of

The problem of repeated data insertions before the line, by troubleshooting the problem and the default isolation level of MySQL-repeatable read (can be reread) , repeatable read ensures that multiple instances of the same transaction will see the same data row when concurrently reading the data. Now through the experiment, the problem is analyzed.1. Turn on transaction A at Terminal A, and check.TRANSACTIO

that no such operations exist on the linked server.4. Add the SET XACT_ABORT on statement before the transaction beginsFor most OLE DB providers, including SQL Server, you must set the Xact_abort in the data modification statement in the implicit or display transaction to ON. The only case where this option is not required is when the provider supports nested transactions.5. MSDTC SettingsOpen "Component S

Concurrent transaction processing and concurrent Transaction Processing Transaction protection is a must for the software industry. Many financial companies simply fail to handle transactions. As we all know, transactions have four major features: ACID. That is, atomicity, consistency, isolation, and durability. Four features Atomicity A

control (mvcc,multiversion Concurrency control) mechanism.Serializable (Serializable)This is the highest isolation level, which solves the Phantom reading problem by forcing transactions to sort, making it impossible to conflict with one another. In short, it is a shared lock on every data row read. At this level, a large number of timeouts and lock competitions can result.4. Single-Transaction and distributed transactionsIn ADO, a

transactions Number of transactions within a transaction: 2 Number of transactions outside of transaction: 1 Using an implicit transaction Number of transactions within a transaction: 1 Number of transactions outside of transaction: 0 Iv. Distributed Transactions A

Reproduced from: https://www.cnblogs.com/jimmy-muyuan/p/5722708.html 1 propagation properties of Transaction (propagation) 1) REQUIRED, this is the default property Support A current transaction, create a new one if none exists.If there is a transaction, the current transaction is supported. If there is no

Ultra-lightweight log Implementation of tens of billions of transaction systems with a daily transaction volume and tens of billions of Transaction Systems First, let's talk about the past ~~ Two years ago, I worked in a traditional financial software company to develop a large transaction system for an exchange. The

1. What is a transaction:A transaction is a rigorous set of operations in a program, and all operations must be completed successfully, or changes made in each operation will be undone, which is the atomicity of the transaction (either success or failure).2. Transaction characteristics:Transaction characteristics are divided into four: atomicity (atomicity), cons

Today we continue to learn the WCF distributed development step-by-Step Series 12: WCF transaction mechanism (Transaction) and distributed transaction programming. As we all know, in the process of application system development, the transaction is an important concept. It is an important mechanism to guarantee the rel

The principle and application of Java transaction in-depth Java transactionFirst, what is a Java transactionThe general idea is that transactions are only relevant to the database.Transactions must be subject to the ACID principles established by ISO/IEC. Acid is an abbreviation for atomicity (atomicity), consistency (consistency), isolation (isolation), and persistence (durability). The atomicity of a transaction