as400 high availability

Tags: databaseA few months ago to bring their own demo environment all overturned (now also forget to overthrow, re-do the egg pain), ready to re-make a high-availability environment, ready to do their own high availability are done next to each other.SQL Server is the most multi-system backend database in Microsoft, s

Heartbeat and DRBD are the same as they were before. Here fine-tuned the next DRBD communication with a dedicated network card, so consider the speed limit is only IO . about MySQL:Yum install mysql-server MySQLback up the previous /var/lib/mysql data and configuration file /etc/my.cnf, and Note that the permissions are MySQL then DRBD mounts to the/var/lib/mysql to copy the data to this directory. Mkdir/backupcd/var/lib/mysql/cp-ar */BACKUP/CP/ETC/MY.CNF/BACKUP/RM-FR/ETC/MY.CNFMO

Label:Can Oracle restart be used to make high availability use of Oracle GoldenGate?From:Can Oracle Restart is used with Oracle GoldenGate for high availability? (Document ID 2025185.1)Suitable for:Oracle goldengate-version 11.2.1.0.20 and laterInformation in this document applies to any platform.Goal:Can Oracle restar

Keepalived high-availability monitoring scripts for MySQL (or other services)Development Script Requirements : We know that KeepAlive is based on the survival of the virtual IP to determine whether to preempt the master mechanism, but if we do the MySQL keepalived high availability, we should consider a situation occur

Tags: clusterFirst, the introduction of the cluster Divided into two categories according to the function: high availability and load balancing; A highly available cluster is typically two servers, one work, and the other as redundancy, and redundancy will take over as the service continues to provide services when the machine goes down; To achieve

Tags: ha high availability keepalived read/write separation MHAExplore MySQL's high-availability architecture MHA (4)-----build MySQL High-availability series (total 9 articles)The previous article describes the MySQL source insta

it to the corresponding directory; Due to limited resources, we use Replica sets + sharding to configure high availability. The structure diagram looks like this:Here I explain the meaning of the figure. L? Shard Server: Use the replica sets to ensure that each data node has the ability to back up, auto-fault transfer, and auto-recover. L? Configuration server: Use 3 configuration s

view of the cost problem, choose this kind of more reliable.High-availability implementationsThe nginx/haproxy+keepalived is the architecture, so why not choose a lvs+keepalived-based clustering scheme?Because we deploy the site will generally involve static and dynamic separation, regular distribution of demand, if the site is the first Choice lvs+keepliaved architecture, then at least in the middle plus a layer of two load balancing machine, so mor

Tags: and replicas. com Performance Synchronization field IDT route imagesIn 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 beca

The high availability of Message Queuing is achieved through clustering.Message Queuing stores important information such as orders, mail notifications, and data distribution in the project, so there is a high demand for stable availability of Message Queuing.It is now possible to ensure the

Label:Highly Available Highly available (high availabiltity) The ability of applications to provide continuous, uninterrupted (usable) services Evaluation of system high availability is usually expressed as an availability rate Causes that are not available Hardware failure (various)

Copyright notice: This article by Chen Long original article, reprint please indicate source:Article original link: https://www.qcloud.com/community/article/127Source: Tengyun https://www.qcloud.com/communityRedis is a high-performance memory database, this article focuses on the Redis in the master-slave mode encountered some problems and how to tune, especially in the cloud environment encountered some special problems, as to how redis use and data

standby high availability features.Keepalived is a software similar to the Layer3, 4 5 switch system, which is the 3rd, 4th, and 5th Exchange that we normally say. The role of keepalived is to detect the state of the Web server. Layer3,45 work in the IP/TCP protocol stack IP layer, TCP layer, and application layer, the principle is as follows:Layer3:keepalived when working with Layer3, keepalived periodic

Label: Objective Because of the recent use of MySQL database, but the company's server and business is limited, so only a single MySQL. So, the problem is obvious, if this MySQL is broken, it will affect the entire company's business, so consider doing a high-availability MySQL program. Currently, MySQL has a lot of high-

This paper mainly introduces a high availability scheme of Redis cluster through Jedissentinel, this scheme needs to use Jedis2.2.2 and above (mandatory), Redis2.8 and above (optional, Sentinel first appeared in the Redis2.4, Redis2.8 Sentinel more stable, Redis cluster is a shard (sharding) plus master-slave way to build, to meet the requirements of scalability;About Redis SentinelRedis Sentinel is the off

　　Lazy learning process is the work of the eldest brother let do what to do research and research what, National Day holiday back weekend boss through nail to me decorate a task, RABBITMQ High available solution , I want to say nail too pit:This is the national day after the 9th Sunday night commute to the task, I saw in Monday when a look, next Friday, it is not 21st, time is so abundant! It's not too early. It happened that the students to interview

According to relevant statistics, server integration is the main reason for enterprises to deploy virtualization. Although server integration helps users improve resource utilization, it also has advantages such as energy saving and centralized management, but it also brings great risks. In the physical environment, for stability and security considerations, a server usually runs only one application. Once the server fails, only the services provided by the application will be affected; after vi

directives, that is, atomicity. Rich feature-redis also supports features such as publish subscriptions, notifications, key expiration, and so on. Runoob.com/reidis/redis-ion.html2. The concept of Reiss Sentinel, Reisis Sentinel, is a highly available solution Reids is officially recommended. When using Redis as the primary-from a high availability solution, if the primary server fails, the Redis itself (i

High Availability of Enterprise LAN with Redundancy I. Basic Knowledge: With the rapid development of the Internet, network-based applications are gradually increasing. This puts forward higher and higher requirements on network reliability. Updating all network devices is of course a good reliability solution. However, we can adopt the idea of cheap redundancy to protect existing investment, find a balance

First, the principle of summary: High Availability Network: 1, Server aspects: cluster; "lb load balanced ha high availability hp high performance" 2, the router aspect: HSRP, VRRP; 3, network interface: Multi-card binding "bond"; 4, Link aspect: LAN LAN: Port aggregat