db2 high availability

High Availability of SQL ServerEvery time we talk about the high availability of SQL Server, many DBAs, especially SQL Server DBAs, feel a pain: Because we all think that SQL Server cannot or is difficult to implement SQL Server. There are also a lot of DBA friends with a head shot, giving the answer "isn't

High-availability architectures are basically standard for Internet services, both application services and database services need to be highly available. Although the Internet service is called 7 * 24-hour uninterrupted service, but there are some times when the service is not available, such as some time the Web page is not open, Baidu can not search or can not send micro-blog, hair micro-letter and so on

If you say Taoxin potter, high availability is even more important than high performance. Why?Because you optimize the performance of the system 10 times times, your boss may say: "Xiao Dong Ah, good job."However, if you are responsible for the module, Zooey will be down, hey, you know.Availability Metrics99%-----website year unavailable for less than 88 hours99.

DirectoryOpenstack-mitaka Overview of High AvailabilityOpenstack-mitaka High-availability environment initializationOpenstack-mitaka High-availability Mariadb-galera cluster deploymentOpenstack-mitaka High

Detailed description of MHA parameters of the MySQL high-availability component. Description of MHA parameters of MySQL high availability component MHA is currently a relatively mature solution for MySQL high availability. It was

Label:First, MySQLMySQL small high-availability architecture program: MySQL dual master, master-slave + keepalived master-slave automatic switching server resources: two PC server Advantages: Simple architecture, saving resources disadvantage: Unable to scale linearly, master-slave failure requires manual recovery of master-slave architectureMySQL medium high-

synchronizes master2 data.Four: summaryAfter the above steps, the implementation of MySQL high-availability based on MMM is simple. Also found that MMM is better than keepalive place. MMM not only can monitor the running state of two master nodes, but also can monitor the running state of multiple slave nodes, and any problem of node will automatically switch the virtual IP of the failed node to o

Our business systems, whether internal enterprise systems or Internet application systems, require scalable and highly available systems. Scalability and high availability are not isolated. Only by combining them can we achieve the desired results. Scalability is an optional attribute of a system, network, or process. It expresses the meaning that it can handle increasing work in an elegant way, or expand i

I. OverviewWhen we consider the high-availability architecture of the MySQL database, we mainly consider the following aspects: If the database is down or an unexpected outage, and so on, can restore the availability of the database as soon as possible to reduce downtime, to ensure that the business will not be interrupted due to database failure. Da

SQL Server High-availability scenarios Scenario One:asynchronous Mirror + AliasProgram IntroductionThe database server configures an asynchronous mirroring relationship, and the program client connection string configures the alias connection.1. Create an alias in the SQL Server client configuration, replacing the server name or IP address with an alias in the client's connection string settings.2. Write a

The Oracle High Availability Technology (PAA) is now based on proven Architecture related to its Maximum Availability Architecture (locally, locally) the design blueprint is based on proven Oracle High Availability technologies. The optimization method is recommended by the

Tags: network server database Solution binaryMySQL database, as one of the most basic data storage services, has a very important position in the whole system, so it is understandable to ask for high availability. There are many solutions that can implement different SLAs (service level agreements) that ensure that the database server continues to be available in the event of hardware or software failure.Th

MySQL database, as one of the most basic data storage services, has a very important position in the whole system, so it is understandable to ask for high availability. There are many solutions that can implement different SLAs (service level agreements) that ensure that the database server continues to be available in the event of hardware or software failure.There are two main problems that

As shown in the following figure, this task consists of the high-availability server Load balancer component and cache DNS. High-availability server Load balancer component requirements: optimize some key links in the business system architecture, load balancing for TCP layer data traffic, and ensure

Highly available clustersI. What is a highly available clusterA highly available cluster is when one node or server fails, another node automatically and immediately provides services, and the resources on the failed node are transferred to another node, so that the other node has resources that can provide services to the outside. When a highly available cluster is used for a single node failure, the ability to automatically switch resources and services can ensure that the service remains onli

I. What is a highly available clusterA highly available cluster is when one node or server fails, another node automatically and immediately provides services, and the resources on the failed node are transferred to another node, so that the other node has resources that can provide services to the outside. When a highly available cluster is used for a single node failure, the ability to automatically switch resources and services can ensure that the service remains online. In this process, it i

Keepalived Due to the use of mysqlcluster in the production environment, high availability load balancing is required, and keepalived+haproxy is provided here for implementation. The main function of keepalived is to realize the fault isolation of the real machine and the failover between load balancer. Can be exchanged at the 3,4,5 layer. It is implemented through VRRPV2 (Virtual Router redundancy) stack

Environment:1. Three servers have Windows cluster set upFor a WIN cluster, refer to: http://pxizhi.blog.51cto.com/5283742/15981462. And three servers are fully installed in SQL 2014 Enterprise Editionin the build A lways on High Availability Group before the Three server database instances need to Enable AlwaysOn availability groups feature1. To start an Always

The Linux HA cluster high availability server cluster, so-called high availability is not high availability for the host, but is highly available for the service.What is high

1. OverviewWhen we consider the highly available architecture of the MySQL database, we mainly consider the following aspects: If the database is down or an unexpected outage, and so on, can restore the availability of the database as soon as possible to reduce downtime, to ensure that the business will not be interrupted due to database failure. Data for non-primary nodes that are used as backups, read replicas, and so on, should be in r