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read committed is used to continue after execution is complete; if it is SERIALIZABLE, an error is returned.9 A commit A transaction10 if B READ COMMITTED, continue to executeWorkspace: separated from data changes to create a data space of a specific version.
Online Transaction Processing OLTPAtomicityConsistencyIsolationDurabilityGeneral features of
Several steps of MySQL transaction processing:1. Turn off automatic submission2. Open transaction Processing3. The exception will automatically throw the exception prompt and roll back4. Turn on automatic submission
Note: MySQL has only this innodb driver that supports transaction
The concept of online analytical processing (OLAP) was first proposed by the parent of the relational database e.f.codd in 1993, and the proposed OLAP has aroused great repercussions, and OLAP is clearly distinguished from online transaction processing (
hex, the webmaster of http://codeigniter.org.cn/, in middle March this year. Then I forgot about it. Today, our online businesses once again think this problem has caused me to troubleshoot it again. For specific reasons, please let me know. (This problem also exists in the latest Version 2.1.0)
Analysis:Take CodeIgniter Framework Version 2.1.0 as an example. In the CI_DB_driver class of system \ database \ DB_driver.php, row 58th has a $ _ trans_sta
MySQL transaction processing and application analysis transaction processing are widely used in various management systems. for example, in the personnel management system, many database synchronization operations require transaction pro
MYSQL-transaction processing is widely used in various management systems. For example, in the personnel management system, many synchronous database operations require transaction processing. For example, in the personnel management system, if you delete a person, you need to delete the basic information of the person
CodeIgniter Framework database transaction processing design flaws and solutions, CodeIgniter framework
Cause:
In one of our online businesses, using older versions of the CodeIgniter framework, there is a design flaw in the DB Class for the DB thing Processing Section, perhaps not a flaw. But he has influenced our pr
Label:Transaction processing in various management systems have a wide range of applications, such as personnel management system, many synchronous database operations need to use the transaction processing. For example, in the Personnel Management system, you delete a person, you need to delete the basic information of the person, but also to delete the informat
Design defects and solutions for CodeIgniter framework database transaction processing, codeigniter framework
Cause:
In an online business, we use the older CodeIgniter framework. In the DB class, there is a design defect in the processing of DB transactions, maybe it's not a defect. However, it affects our production
Transaction processing is widely used in various management systems. For example, in the personnel management system, many synchronous database operations require transaction processing. For example, in the personnel management system, if you delete a person, you need to delete the basic information of the person and t
Label:transaction processing in various management systems have a wide range of applications, such as personnel management system, many synchronous database operations need to use the transaction processing. For example, in the Personnel Management system, you delete a person, you need to delete the basic information of the person, but also to delete the informat
Label:Transaction processing in various management systems have a wide range of applications, such as personnel management system, many synchronous database operations need to use the transaction processing. For example, in the Personnel Management system, you delete a person, you need to delete the basic information of the person, but also to delete the informat
account to another, or two accounts are not changed, and there is no other situation. isolation : One transaction has no effect on another transaction processing. This means that no transaction is likely to see a transaction in an incomplete state. For example, in a bank tr
MySQL transaction processing2011-03-06 16:26 2984 people read Comments (0) favorite reports Mysqltransactionspostgresql Database Sybasenullmysql5.x have been released for a long time, but there are many people think that MySQL is not support transaction processing, this has to blame them is ignorant, in fact, as long as your MySQL version support BDB or
This article mainly introduces the design defects and solutions for CodeIgniter framework database transaction processing. It can also be said that it is a small BUG. friends who use CodeIgniter transactions will encounter this problem, for more information, see the CI framework.
Cause:
In an online business, we use the older CodeIgniter framework. in the DB cl
In the management system of transactions have a wide range of applications, so that our personnel management system, most of the synchronous database operation is very necessary to use transaction processing. For example, in a management system. You delete a person, you need to delete the basic information of the person, but also to delete the information related to the person. such as mailboxes, articles a
continue to be provided by other machines. So, we need to focus on the following scenarios:1) Disaster tolerance : Data not lost, node failover.2) consistency of data : Transaction processing3) Performance: Throughput, response timeAs mentioned earlier, to solve the data is not lost, only through the data redundancy method, even if the data partition, each area also needs data redundancy processing. This i
Transaction processing in various management systems have a wide range of applications, such as personnel management system, many synchronous database operations need to use transactions. For example, in a personnel management system, you delete a person, you need to delete the basic information of the person, but also to delete the information related to the person, such as mailboxes, articles and so on, s
Transactions are required to meet 4 conditions (ACID): atomicity (autmic), consistency (consistency), isolation (isolation), persistence (durability)
Atomicity (autmic): The transaction is in execution, to do "either do it or do it all!" ", which means that the transactional part is not allowed to execute. Even if the transaction can not be completed because of the failure, also eliminate the impact on the
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