webpass availability

High Availability Configuration 4. keepalived high-availability column brainFor some reason, the two keepalived high-availability servers cannot detect the heartbeat messages of each other within the specified time, and each of them obtains the ownership of resources and services, at this time, both high-availability

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 Availability of protocols 1.1 Build Ttserver. As shown in the figureIPIs17

MySQL High-availability Solution MHA Introduction Overview mha is a Japanese MySQL Daniel written in Perl a set of MySQL failover scheme to ensure that the database system is highly available. During downtime (typically within 10-30 seconds), complete failover, deploy MHA, Can avoid the master-slave consistency problem, save the cost of purchasing new servers, do not affect server performance, easy to install, do not change the existing deployment.

First, elaborated the Linux HA cluster use background;1.1 High-availability cluster definitions:Highly available cluster full name: High Availability Cluster, simply put, the cluster is a set of highly scalable, high-availability, cost-effective computers. They provide the user with a set of network resources as a whole. One of the individual computer systems is

All configurations are cached locally, the remote Configuration center down, without affecting local use, but cannot be re-requested by the server to obtain the configured updates.Whether it's high availability in the registry, or high availability in the configuration center.Essentially, the service is guaranteed to be registered or can be obtained from the configuration center.The high

First, activemq the main categories of deployment comparison 1, the default stand-alone deployment (KAHADB) 2, based on zookeeper master-slave (Leveldb master/slave) 3, based on shared database of Master and slave (shared JDBC master/ Slave) Second, server description III, data preparation IV, ACTIVEMQ configuration upload to the specified location decompression modify Brokername value comment out the default persistenceadapter add new Leveldb week02, week03 configuration changes Five , start si

Tags: mysql high availabilityThe MMM high-availability MySQL program is a well-developed MySQL high-availability cluster solution written in Perl, based on MySQL master-slave replication, with a Management side (monitor) and multiple agent-side (agent) components. Through MMM, we can monitor and manage the status of MySQL master replication and service, as well as monitor the replication and operation statu

First, Introduction Whether it is keepalived or heartbeat do high availability, its high availability, are standing in the server script to say the high availability, rather than the angle of the service. In other words, if the server down or network failure, high availability can be achieved automatically switch. If t

Tags: replicat ase process YSTEMD SCP program Col technology share load BalancingMariadb-mmm High-availability clusters1.MYSQL-MMM Overview MMM (Master-master Replication Manager for MySQL) is a set of scripting programs that support dual-master failover and dual-master daily management. MMM is developed using the Perl language, which is mainly used to monitor and manage MySQL Master-master (dual master) replication, although it is called dual master

Tags: expand product commit prim rollback redundant tar file enforcementPXC Introduction:The Galera product is a galera cluster way to improve the high availability clustering solution for MySQL. Galera cluster is a MySQL cluster with integrated Galera plugins. Galera replication is a MySQL data synchronization scheme provided by Codership, which is highly available, easy to expand, and can realize data synchronous replication and read/write between m

Label:MySQL's high-availability scenarios typically include the following: Keepalived+ Dual master, Mha,mmm,heartbeat+drbd,pxc,galera Cluster The more commonly used are keepalived+, MHA and PXC. For small companies, it is generally recommended to use keepalived+ dual master, simple. Let's deploy it here. Configure the Environment: Role host IP host name operating system version software version VIP 192.168.244.10 Master1 192.168.244.145 master1 CentO

Label:One, MySQL fabric high-availability cluster A database crashes, does not affect the integrity of the data1. Pre-Test preparationA) View the server status of the Group_id-1 cluster groupMysqlfabric Group Lookup_servers Group_id-1return Result:Command: {success = True return = [{' Status ': ' PRIMARY ', ' server_uuid ': ' 7a45f71d-7934-11e4-9e8c-782bcb74823a ', ' mode ': ' Read_write ', ' Weight ': 1.0, ' address ': ' 192.168.1.71:3306 '}, {' Stat

Tags: block keepaliv 4 row make using start net install addressMemcached +keepalived High Availability cluster Memcached Primary master replication This architecture, when the program is connected to not know which primary server, so need to add VIP address on the front-end to achieve a high-availability architecture. This is achieved with keepalived, so keepalived is used to detect whether the sta

When you recently deployed a Microsoft TFS-based software lifecycle management platform to a customer, customers asked for high availability at the database tier, reducing the impact of software development on database server failures.The customer's existing domain is a Windows 2008-level enterprise domain that is built on Windows Server 2008. In order to comply with the security requirements of the customer enterprise domain, minimum permissions are

Mysql-mmm is the MySQL master Replication Manager that implements the following functions:High Availability ( VIP Floating technology similar to keepalived)Only one database write operation is provided at the same time to ensure database consistency.upgrade slave to master, continuation of dual-master architectureFirst set up a database Master master, master-slave Architecture: Similar diagram: (no longer narrated)Monitor the current synchronization s

Memcached + keepalived High-availability cluster memcached IntroductionMemcached is an open-source, high-performance distributed memory object caching system that saves all datastored in memory because a huge hash table is maintained in memory, so any storage type is supportedData. Many websites use memcached to improve the speed of website access, especially for largeWebsites that access data.Memcached is a typical C/s architecture, so you need to in

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+ehcacheFor the middleware nginx often to do the traffic distribution, colleague Nginx itself also has its own caching mechanism, but, the

Tags: roc you virtual host Targe Port manual logging response modeThis time using Haproxy only test the web side of high availability and load balancing, the problem is that Haproxy is a single point, so you also need to keepalived haproxy high availability, the next explanation.Server:*.*.*.*:haproxyTwo HTTPWhat you need to know is:1. High availability and load

Share various high-availability technologies in MYSQL (derived from jiangchengyao) and mysql jiangchengyaoShare various high-availability technologies in MYSQL (from Jiangcheng yaoda NIU) Images and materials from MYSQL Daniel Jiang chengyao (author of MYSQL technology insider) Jiang chengyao: Technical Manager of Netease Hangzhou research institute leads the development of INNOSQLComparison of mysql High

goal of no single point of failure, no matter which master in peta goes down, it can be automatically replaced by its slave machine to avoid service interruption.Introduction to the high availability principle architecture of peta2 1. Problems to be Solved when using the master-slave node mode to achieve high availability Two problems need to be solved once the master-slave nodes are involved to achieve hi