obiee high availability

A few days ago, we used Heartbeat as a solution for the high-availability service architecture. Today we have tested a brand new solution that uses Keepalived to implement this function. Keepalived is a high-performance high-availability or hot standby solution for servers.

??Now there are a lot of domestic users of the availability of cloud services misunderstanding, what kind of misunderstanding? For example, a cloud service provider, there is a room in South China, there is a computer room in east China.The customer mentions a requirement, what do you mean by the concept of 99% usability? Is there something wrong with my machine in the Southern engine room? My machine on its own initiative to transfer to East China co

Master-slave replication of mysql databases is relatively simple, but it is also a basis for the high availability of mysql databases, in my understanding, the high availability of all mysql Databases evolved from this master database and from simple replication. This blog is written because Master-slave replication of

Fault Tolerance and high availability application architecture based on AWS cloud services AWS provides reliable, fault-tolerant, and highly available system infrastructure and services built on the cloud. Special attention from developers is required. These features have been designed for AWS services, but must be clearly and accurately used. Amazon EC2 provides modules to build the target infrastructure

1)keepalived use more simple : From the installation, configuration, use, maintenance and other aspects of the comparison, keepalived is much simpler than heartbeat, especially Heartbeat2.1.4 split into 3 sub-projects, installation, configuration, Use is more complex, especially when the problem, do not know which subsystem is the problem, and keepalived only 1 installation files, a configuration file, configuration file is also much simpler;2)heartbeat function more powerful : heartbeat Althoug

Tags: database always on high availability SQL Server 2014For an overview of always on, here's not much to say, you need to see Microsoft's official website: https://technet.microsoft.com/zh-cn/library/ff877884 (v=sql.110). aspxLet's start by introducing the machines used in your environment. Computer name IP Address Note Contoso-sql-a01 172.168.1.43 Always on

through the vip. # Pkill keepalived # Ip a show # Mysql-h192.168.17.166-uaaron8219-pzlm 4. configure database synchronizationAfter keepalived is installed, it only ensures the high availability of the mysql database. to ensure mutual master and slave, you also need to configure the MySQL master-slave replication mode so that the database can be consistent. 1. parameters required for synchronization at bot

First, High available HA (high available) is highly available and is also known as a dual-machine hot standby for critical business. The simple understanding is that there are two machines A and B, the normal is a service, B standby idle, when a down or service outage, will switch to the B machine to continue to provide services. Commonly used high-

Requirement We use elasticsearch for log service. The architecture is upstream data source => redis => logstash => es Redis is still a single point of use, and there is no high availability. Now there is more and more data. If downstream consumption is not a problem, it will take place if data in redis comes, but once the downstream has a problem, the memory allocated to redis is full in half an hour. We ca

In the age of big data, traditional relational databases need to be able to have higher services to solve the challenges of high concurrency and read-write, efficient storage of massive data, high scalability and high availability. But it is because of these problems that NoSQL was born.NoSQL has these advantages:large

database cache.2) The above is suitable for lnmp,lamp environment.3) memcached server can also be multiple units via hash dispatch.################# #针对memcached单点故障出现的问题解决方案: ( also not perfect, no fix master hangs, re-open Data unrecoverable problem)1, high availability for memcachedHttp://blog.snsgou.com/post-800.html2, the use of Sina Memcacheddb, the original client is still memcached, but on the serv

Tags: pxc mysql high-availability cluster architectureSome time ago, Lao Zhang introduced the mainstream MySQL high-availability Cluster Architecture trilogy in the first two parts, there are students who do not know to visit my previous blog content.First through train >> MySQL mainstream