mongodb high availability

LVS + Keepalived for high-availability Load Balancing I. Principle 1. Summary if you divide TCP/IP into five layers, Keepalived is similar ~ Software with layer-5 switching mechanism, with 3 ~ The layer-5 switching function is mainly used to detect the status of the web server. If a web server fails, Keepalived will detect and remove it from the system, when the web server is working normally, Keepalived au

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 t

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 inst

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 b

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

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 se

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,

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 archi

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 custome

-addresses=172.20.138.212:3306--proxy-lua-script=/usr/local/mysql-proxy/share/doc/ Mysql-proxy/rw-splitting.lua;;' Stop ')Killall Mysql-proxy;;EsacExit 0Or use the configuration method to startVim/etc/mysql-proxy.cnfAdmin-username = CCDAdmin-password = CCDDaemon = TrueKeepAlive = TrueProxy-backend-addresses =172.20.138.209:3306;172.20.138.212:3306Proxy-read-only-backend-addresses =172.20.138.212:3306Proxy-lua-script =/usr/local/proxy-mysql/share/doc/mysql-proxy/rw-splitting.luaAdmin-lua-script =

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

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 n

Kafka High-availability design2016-02-28 Du Yishu Kafka in earlier versions, the high availability mechanism was not provided, and once a broker went down, all partition on it could not continue to serve, even data loss occurredFor distributed systems, when the cluster size rises to a certain extent, the likelihood of

1. Introduction to keepalived Keepalived is an open-source software that can implement high-availability resources. Its main components include core, check, vrrp, libipfwc, and libipvs. The functions of each component are described here. Core: The core Component of keepalived. It is responsible for starting and maintaining the main process and loading the parsing configuration file. Check: Responsible for h

What is an enterprise application cluster Cluster refers to the aggregation of different servers together, a collection of servers, which provides the client with a virtual platform, so that clients do not know the structure of the server collection can be deployed to the server collection of applications, access to services and other operations. Clustering is a key feature of enterprise applications, and it can provide: High scalability: You can a

Label:This series analyzes OpenStack's high availability (HA) concepts and solutions: (1) Overview of OpenStack high-availability scenarios (2) Neutron L3 Agent HA-VRRP (Virtual Routing Redundancy Protocol) (3) Neutron L3 Agent ha-dvr (Distributed virtual machine router) (4) RabbitMQ HA (5) MySQL HA1. MySQL HA Scenario

Http://www.haokoo.com/internet/2877400.htmlKafka in versions prior to 0.8, the high availablity mechanism was not provided, and once one or more broker outages, all partition on the outage were unable to continue serving. If the broker can never recover, or a disk fails, the data on it will be lost. One of Kafka's design goals is to provide data persistence, and for distributed systems, especially when the cluster scale rises to a certain extent, the

CentOS6.6 install heartbeat for High Availability I recently learned about the High Availability Technology in linux under the guidance of a teacher, using the heartbeat software to achieve high availability of Server clusters. Be

Keepalived Reality Web dual standby (high availability) by implementing keepalived high availability on both master and standby schedulers, the single point of failure of the scheduler is resolved The LVS is configured on the Master and Standby scheduler , and the main scheduler works normally When the main scheduler

The company has three physical servers, installed windows server 2008 R2, and enabled Hyper-v. Each of the three physical servers has three virtual machines (9 in total ). The current environment does not support high availability of virtual machines. We plan to configure a windows Cluster to support high availability