mongodb high availability

-perform the operation of the master server from the server, in this way to ensure the consistency of the data. In order to achieve higher availability, in the actual application environment, the use of MySQL replication technology with high-availability cluster software keepalived to achieve automatic failover, this way can achieve 95% SLA. 2MMM/MHA

Microsoft ExchangeServer2010 includes a new unified framework for mailbox recovery, which includes some new features, such as database availability Group (DAG) and mailbox database copy. Although these new features can be deployed quickly and easily, you must first carefully plan to ensure that any high availability and site recovery solutions that use these feat

$initphp_conf[' db ' [' Test '][1][' charset '] = ' UTF8 '; Database encoding $InitPHP _conf[' db ' [' Test '][1][' pconnect '] = 0; Whether persistent linksThe initphp supports multiple database connections and also supports read and write separations.Our side mainly only the operation of a single table.Basic use 1. Create a data tableWe create a very simple user table in the test library:Table structure:CREATE TABLE ' user ' ( ' id ' int ') NOT NULL auto_increment, ' username ' varchar (255

Highavailabilitytoolkit High Availability toolkit includes des several solutions by which achieving architecture with high availability is a easy thing.Background The high availability of the Core Application System of Internet

, compare the locations of the masterbinlog read by the I/O threads between slave nodes, and select the closest slave as the latestslave node. Other slave logs are generated by comparing with latest slave. Apply the binlog stored from the master on the latest slave and upgrade the latest slave to the master. Finally, apply the corresponding differential relay logs on other slave instances and start copying from the new master.When MHA implements Master failover, MHA Node attempts to access the f

A brief introduction to the principle1.HAProxyHaproxy provides high availability, load balancing, and proxies based on TCP and HTTP applications, supporting virtual hosting, which is a free, fast, and reliable solution. Haproxy is especially useful for Web sites that are heavily loaded, and often require session-hold or seven-tier processing. Haproxy runs on today's hardware and can support tens of thousand

Tags: virtual priority dir Server configuration fix check Maria x86 BubukoThere is a single point of failure for a MySQL host in the production environment, so we want to make sure that MySQL is high availability, that is, if one of the MySQL servers is hung up, the other one can immediately take over. MySQL's high-availabili