db2 q replication

is the highest protection mode, the main system must wait until the standby system completes the log write (to write to the disk) and the data update and back to the completion signal to respond to the next operation; Near-synchronization (Nearsync), this is a tradeoff, the main system as long as the log to the main memory of the standby system and received the signal of the standby system to respond to the next operation (if the network conditions are good, you can consider this); Asyn

Label:synchronous, asynchronous, semi-synchronous replication comparison:Synchronous replication: Master commits the transaction until the transaction is committed at all slave, and the client is returned, and the transaction is completed. Disadvantage: There can be a significant delay in completing a transaction.Asynchronous replication: Requests Binlog to Maste

transaction, run the transaction closing sentence COMMIT or ROLLBACK. The COMMIT statement ends the transaction and tells the database server to persist all changes. ROLLBACK, on the other hand, causes the database server to undo all changes made in the transaction.In this world, there is not only a "regular" application. There are also specialized applications that typically have very specific requirements. For example, an application that involves replicating data between database systems (su

Asynchronous replication: MySQL natively supports one-way, asynchronous replication. Asynchronous replication means there is a delay in copying data from one machine to another-most importantly this means that the data cannot be copied/applied to the slave at the same time when the application's transaction commit has been confirmed. Typically, this delay is dete

The following articles mainly introduce you to the basic DB2 commands and related knowledge that you must master as a beginner in DB2 database learning. We all know that you are in the DB2 database getting started course, some friends mentioned this question, and experts answered it and compiled it to help other friends learn and master it. Common

data center is paralyzed due to disasters (floods, fires, earthquakes, and Tornado. There are already a lot of great technologies available to significantly reduce the time required for the application system to resume operation at the standby site in the event of a disaster at the primary site, among them, the best is Data Replication Based on disk arrays. There are also some programming practices (such as frequent submission) and

Tags: mysql replicationMySQL replication principle/library-based multi-threaded replication principle/BLGC-based multi-threaded replication principleSingle thread master-slave replication:From the library to the main library to request Binlog, and binlog into their own relaylog, from the library redo Binlog inside the SQL,This is done mainly by the following thre

Function Permission Monitor user MMM (Multi-Master replication manager of MYSQL) monitors the health status of each Master REPLICATION CLIENT Agent user MMM proxy is used to set read-only attributes, replication master, etc. SUPER, replication client, PROCESS Replicate user

Master-MasterMySQL replication and installation configuration test I. Architecture Ii. Install Mysql server The following uses the configuration of DB1 (192.168.0.10) as an example. The configuration of DB2 is basically the same. You only need to modify server_id = 2 in my. cnf. 1. Install mysql-server Db1 # apt-get install mysql-server Note: ? If the installation is faulty, execute apt-getup

, 3, 5] [1, 2, 3, 5]Here, both variables A and B point to the same object (a list). Therefore, once you modify either of them, the other one will also be affected. in any case, the original object will be modified.Note:To become a python expert, the first thing to note is the change operation and assignment of objects, which are all reference operations on objects. A statement such as a = [] re-binds a to a new object, but does not affect the previous object. however, object

for DB2 PE will be able to run on any other version of DB2. You can use DB2 PE to develop DB2 applications and then use them in the production environment. DB2 PE is useful no matter whether the PC is connected to the network. for users who need powerful data storage, or w

This part is simple and clear at a glance. Five different permission levels: sysadm, sysctrl, sysmaint, dbadm, and loadBut I have read that there is sysmon in CFG, which may be mentioned later (to obtain access to database system monitor data)Or the version is not updated. The following aspects of the DB2 authorization control database security plan:* Permission level granted to a user* Commands that can be run by users* Allows users to read and/or m

any other version of DB2. You can use DB2 PE to develop DB2 applications and then use them in the production environment.DB2 PE is useful no matter whether the PC is connected to the network. for users who need powerful data storage, or who need to provide database storage tools and be able to connect to a remote DB2

to these databases for remote management .) Because "This DB2 is still DB2", the applications developed for DB2 PE will be able to run on any other version of DB2. You can use DB2 PE to develop DB2 applications and then use them