postgresql high availability

Experiment Description:This experiment is based on Heartbeat CRM, which realizes high availability to MySQL service, and does not have high available MySQL data.Unfinished: The Specify mount option fails when using Hb_gui to configure Mount NFS.MySQL data and configuration files placed on NFS shared storageThe mysql configuration file is specified using--default-

seconds ######################################################################### Rediscli= "/usr/local/redis/bin/redis-cli" Logfile= "/var/log/keepalived-redis-state.log" Echo-e "[backup]\t$ (Date ' +%f%T ') \nbeing slave ..." >> $LOGFILE 2>1 Sleep #延迟15秒待数据被对方同步完成之后再切换主从角色 echo "Run slaveof cmd ..." >> $LOGFILE $REDISCLI slaveof 172.16.6.100 6379 >> $LOGFILE 2>1 ④, execute permissions for all scripts [root@legion102/etc/keepalived]# chmod +x/etc/keepaliv

Label:For space reasons, AlwaysOn availability groups are split into two parts: theoretical and actual. The actual combat component was then disassembled for preparation and the AlwaysOn availability Group was built. Three articles of the respective links: SQL Server->> high Availability and disaster recovery (HADR) te

Reaffirm again Although I have never found a shortage of issues related to high availability or disaster recovery, the previous issue of WebSphere reverse investors (dealing with WebSphere application Server management High Availability option) suggests that the number of these issues appears to have increased recentl

Without the idea of design, you cannot become an architect. The architect is a good piece of code, drawing a beautiful uml/prototype, wrote a technical document, more to solve the project key technology of the comprehensive talent. Architect = Front-end engineer + back-end Programmer + System Analyst + Key Technology Solutions + various technology collocation + design mode + deployment tuning + other, visible architects are generalists, and play a key role in connection management and project me

/wKioL1X24xGAf6CzAAHCazDqLU4392.jpg "title=" 11.png "alt=" Wkiol1x24xgaf6czaahcazdqlu4392.jpg "/>8.12 Click "Close" after successful completion650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/73/2C/wKiom1X24OqyBAoOAAJTxCXDsJ0188.jpg "title=" 12.png "alt=" Wkiom1x24oqybaooaajtxcxdsj0188.jpg "/>8.13 Now you can see that the availability group has been created.650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/73/29/wKioL1X24y2C1_laAAJ9

I. Concept INTRODUCTIONHA (High availability) refers to improving system and application availability by minimizing downtime due to routine maintenance operations (planning) and sudden system crashes (unplanned). It differs from the fault-tolerant technology that is considered to be uninterrupted operation. Ha system is the most effective method to prevent the fa

Keepalived, Lvs,tomcat high availability, high concurrency, high-performance application architecture Keepalived, LVS built on the same server, two Tomcat on a tomcat Four server versions: CentOS 6.5 Yum Install Ipvsadm-y Keepalived:etc/keepalived/keepalived.conf ! Configuration File for KeepalivedGlobal_defs {Notifi

Springcloud high availability and springcloud availabilityPurpose In the actual production environment, a single point of registration center is defective. When the node goes down, the microservices dependent on its services will fail, therefore, a high-availability registration center is needed to make up for this def

Basic configuration and tuning policies for high-availability and high-performance computer systemsQingdao railway station Computing Center Yu Dong Liu Mei Computer users need such a computing environment: ReliabilityThe performance must be sufficient to handle various loads in complex environments. Users place various applications in computer systems, and the ap

Opening overview In today's mobile internet, Internet +, the era of big data, all kinds of internet sites, platform anomalies, as springing up, there is a "suddenly like a night spring breeze, thousand tree million Tree pear blossom" feeling.For the mobile internet era of the platform, the user's sense of experience is good? Is the stability of the platform good? Estimate is for all the Internet platform two big head and other elements bar, indeed, the mobile internet era, traffic is th

Tags: Jedis an instance part high Availability architecture definition important emergence SRCIn a production environment, for high concurrency architectures, we know that caching is the most important link for a lot of high concurrency. Can be implemented using a three-tier cache architecture, which is Nginx+redis+ehc

then configure/etc/keepalived. conf. You only need to change the annotation part. 4. Set gateways on two real servers respectively Set all gateways to 192.168.10.10. 5. Configure HTTP in two realservers [[Email protected] ~] # Yum-y install httpd[[Email protected] ~] # Cd/var/www/html/[[Email protected] HTML] # Cat index.html[[Email protected] HTML] #/etc/init. d/httpd startThe configuration of another machine is the same, and the process is omitted. 6. Run service keepalived start on

balancing algorithms usually include: polling, random, source address hashing, weighted polling, weighted random, and minimum join Refer to: 6 load Balancing algorithms4. Use caching to improve query service performanceIn the case of multi-write less, it is very suitable to use the cache to improve the performance of the query service, reduce the pressure on the database. Redis cluster is often used as a cache server, and the Redis cluseter mechanism can guarantee

Tokyo tyrant ( ttserver ) series - high availability and high reliability + nginx [ author: Sun Li link: http://www.cnblogs.com/sunli/ Update Time: ] previous article Tokyo tyrant ( ttserver ) series -memcache protocol 1. Based on Memcache High