dual rg6

Tags: high-availability database scheme keepalived MySQL dual master Mutual preparationMySQL dual master mutual Standby Architecture modeOperating system CentOS 6.3MySQL version mysql-5.0.56Keepalived keepalived-1.1.19.tar.gz650) this.width=650; "Src=" Http://s4.51cto.com/wyfs02/M00/88/6A/wKiom1f2SrfQGcf-AACVzMwJ5yE052.png-wh_500x0-wm_3 -wmp_4-s_1022143711.png "title=" image 1.png "alt=" Wkiom1f2srfqgcf-aac

Suppose A, b two servers do MySQL dual master.There's a Table tab.CREATE TABLE tab (ID int primary KEY auto_increment,name varchar (20));And thenIf it is MySQL master, A is the main, then a machineReset Master;Then the B-machineStop slave;Reset slave;Start slave;If after the A-machine reset master, before the B-machine stop Slave, there are new data insertion, deletion and other operations, when the B machine start slave, B machine will not lose data,

Generally speaking, dual-machine hot standby refers to two machines are running, but not both machines are at the same time to provide services. When one of the service providers fails, the other one will automatically take over and provide the service immediately, and the switch time is very short. The following is a keepalived combined with Tomcat to implement a Web server's dual-machine hot standby. The

The so-called dual channel is to add a single memory bus, let communication bridge between the chip and memory module bandwidth to twice times, although this new specification is mainly chipset and host board end of the change, but the purpose of dual channel is also to solve the problem of memory bandwidth, so that the host board even if only using DDR400 memory, Also can reach the frequency width 6.4gb/s.

Tags: mysql masterIn this era of data explosion, data backup is the most important consideration for each company, the database as the storage Data Warehouse, its importance is self-evident. Mainstream databases are: 1. Large Database Oracle 2. Medium SQL Server 3. Small database MySQL. It can be said that each has its advantages, here is not to repeat.MySQL dual-machine master, is the main database of all data written to the backup database, the impl

Database issues with the authentication server1. Environment constructionThe remotely connected server is Windows 10.10.10.40 that needs to be installed XmangagerRoseha 9.0 is a graphical management interface, Linux-enabled graphical interfaceDual-Machine ip:10.10.10.910.10.10.10Drift ip:10.10.10.112. Open Xbrowser 5New XDMCP session, enter IP 10.10.10.9 default port, connection successful3. Log in as root, open terminal, enter HCC to open Roseha Control Center graphical interfaceAfter logging i

Introduction: Principle and thought the Gtid master-slave replication mode is chosen here to ensure the correctness, health and compatibility of master-slave replication. Here are two servers, a, b each has MySQL instance 3310, two instances between the master-slave replication mode using Gtid master-slave replication mode, the server A, A/b on the configuration of keepalived load balancer, through the VIP connection to the database, the purpose is that once there is a database outage, Keepalive

MySQL database dual-Machine hot backup 1, MySQL database does not have incremental backup mechanismBackup is a big problem when the amount of data is too large. Fortunately, MySQL database provides a mechanism of master-slave backup, in fact, all the data of the primary database is written to the backup database at the same time. Implement a hot backup of the MySQL database.2, to realize the dual-machine ho

Tags: mysql dual machine hot standby databaseUninstall the version that comes with your system.This is a version of Mysql-5.5.28-1.For a simple, RPM-style installation:RPM-IVH mysql-server-5.5.28-1.linux2.6.x86_64.rpmRPM-IVH mysql-client-5.5.28-1.linux2.6.x86_64.rpm#mysqlMysql>update Mysql.user Set password= "Chengshan" where user= "root"; //Mysql>delete from Mysql.user where user= '; //Delete anonymous userMysql>select user,host from Mysql.user;Mys

will not be appropriate. Because it does not support UEFI format installation, the Windows system cannot be used if it is not installed. So when you order the operation, the computer will ask you if you continue so the original system can not be used, you have to choose not to continue, (then did not take photos, so we can not see, anyway, if you are this model of the computer, and so install the dual system, then you will encounter this problem, you

Application of DVBS/S2 in digital TV system VIII (now popular dual tuner application) Lao Xie in the field of digital television has been mixed for some years, "dvbs/s2 in the application of digital television system" series of articles, a brief introduction of a number of satellite receiving relevant knowledge points. Today Lao Xie continues to play waste heat, and wants to chat with friends about the most popular

Intel At the hot Chips Conference at Stanford University, an Intel engineer confessed that Intel's first dual-core Pentium D processor was a sloppy design, and the company soon launched the product more to get into the dual-core era before rival AMD. Jonathan Douglas, chief engineer at Intel's digital enterprise, said Intel hastily designed a dual-core Smithfield

At present, China's dual-core internet cafe router technology has been very complete, so I studied the development of dual-core internet cafe router, here to share with you, I hope to be useful to everyone. Many Internet cafe owners have been worried about the difficulty of selecting a router with excellent performance and low price. Now, this problem will be swept away with the appearance of ER series

Introduction With the gradual improvement of Ethernet stability, anti-interference and bandwidth problems, Ethernet is entering the industrial control field on a large scale. It is used in industrial process control, communication, spacecraft and navigation systems, and has extremely high requirements on the high speed of reliability and fault response. Currently, redundancy design has been widely used as an effective method to improve the reliability of devices. For a single node in the netwo

1 from dual where null = NULL; No records found SQL> select 1 from dual where null = ''; No records found SQL> select 1 from dual where ''= ''; No records found SQL> select 1 from dual where NULL is null; 1 --------- 1 SQL> select 1 from dual where nvl (null, 0) = nvl (null

Original: http://vckbase.com/index.php/wv/1236.htmlFirst, prefaceSome time ago, because the work is more busy, not able to write in time. In the meantime received a lot of netizens ' letters to ask and encourage, in this together express thanks. Cough...... I also need a job to feed my family ...The last book introduces two methods to write the component program of the automation (IDispatch) interface, one is to write the "pure" IDispatch interface with MFC, and the other is to write the "

Dual-ADSL line: provides the best configuration scheme for enterprises. Therefore, you must first understand the basic knowledge of the dual-ADSL line to prepare for future configuration. For small and medium-sized enterprises, if leased line access is used in the selection of access services, it is likely that the cost will greatly increase the overhead and burden of enterprise operations, however, there i

October 18 Update : Win8.1 officially released, its installation method and the previous Win8, Win8 preview version exactly the same, this article is still valid for Win8.1.The following is the IT house wrote earlier: "Win8 RP version of the installation method summary (including dual system tutorial, etc.)"Thousand call million to make out, Win8 RP version has arrived, mirror download is not too will install system how to do? What about virtual machi

In the platform, we have to take into account the network adapter or switch hardware corruption, or line failure caused by the server offline. We can use a dual-NIC binding to implement redundancy for network adapters or lines, or to increase network throughput.Configuration ExamplesCreate a configuration file for the virtual NIC Bond0Shell> #vi/etc/sysconfig/network-scripts/ifcfg-bond0 Device=bond0Bootproto=noneOnboot=yesUserctl=noipa

Stick in ask this ask that noon wake up good, afternoon played a few dota2 feeling fluent degree is very good, write something to record a bit. Use ArchLinux in general will use the search engine, so just say need to pay attention to the place.1. Steam comes with an OpenGL library that is outdated and runs the possibility of complaining about things like "Cannot find OpenGL GX", looking at archwiki"steam" entries, and removing several libraries from steam.2. But after removing those libraries th