postgresql ha

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Please refer to the following link for more information: http://www.linuxidc.com/linux/2014-04/99574.htmbased on the shared storage set of rhcs?iscsi=clvmreal-time WebService. Reference website https://access.redhat.com/site/documentation/zh-CN/Red_Hat_Enterprise_Linux/index.html Reading: RHCS + GFS (Red Hat HA + GFS) http://www.linuxidc.com/Linux/2014-04/99574.htm Web Service shared storage cluster architecture http://www.linuxidc.com/Linux/2013-05/8

Start the software to test first. Yum installed Nginx does not require manual startup, and virtual IP does not need to be manually configured. The boot heartbeat has a sequence that starts with the main, starting from.Service heartbeat start or/etc/init.d/heartbeat startAnd see if the Lord Nginx process is up.PS aux |grep nginxSee if the Lord virtual IP is upIfcong or IP addNote: The first boot is slow, please wait patientlyCan be found that the Lord started the Nginx and virtual IP, from the to

Listen to the 12th lesson of the Liaoliang teacher tonight Spark ha combat, class notes and assignments are as follows:Spark ha requires the installation of zookeeper, and a stable version of 3.4.6 is recommended.1. Download zookeeper3.4.6,2. Configure Environment variables3. Create data logs4.VI conf/zoo.cfgCreate myID in the 5 data directoryspark-env.sh Configuring HA:Export spark_daemon_java_opts= "-dspa

Build OpenStack High Availability (Ha,high availability)first, the database MySQL high reliability:clusters are not highly reliable,A common approach to building high-reliability MySQL is active-passive master mode : Using DRBDto achieve the disaster tolerance of the main standby machine, heartbeat orCorosyncdo heartbeat monitoring, service switching, or even failover,pacemaker to achieve service (resource) switching and control, or similar mechanisms

because too many Java objects are stored in the memory. If the executor has too many cache objects in the JVM, for example, 80 GB up, how many times of full GC occurs at this time, and you will wonder why my program does not move? You can check the GC log. It was originally in GC. 3. Implement Fault Tolerant tachyon Cluster Based on zookeeper 3.0 prerequisites Hadoop version: 2.2.0.2.0.6.0-101 Zookeeper version: 2.3.5 Tachyon version: 0.4.1 Cluster status: Cluster Masters Sl

Citrix Article Summary:http://www.ctoclubs.com/?p=1132View Original: http://www.ctoclubs.com/?p=1742First, IntroductionNetscalerr official HA feature configurationThe host that needs to be used Host Name IP Address Operating system Configuration Ns1.best.com 192.168.31.30 Outer/10.10.0.31 inside Linux 2 Nuclear 2g100g Ns2.best.com 192.168.31.31 Outer/10.10.0.31 inside Linux 2 Nuc

default, the MariaDB comes with the adatabase named ' test ' that anyone canAccess. This was also intended only for testing, Andshould was removedBefore moving into a productionenvironment.Remove test database and access toit? [y/n] y-Dropping test database ...... success!-Removing privileges on test database ...... success!Reloading the privilege Tableswill ensure that all changes made so farwould take effect immediately.Reload privilege tables now? [y/n] y... success!Cleaning up ...All done!

First, the topological environment:The main nginx load balancer 192.168.166.203Auxiliary nginx Load Balancer 192.168.166.177VIP Address 192.168.166.178 http://www.keepalived.org/download.htmlTAR-ZXVF keepalived-1.2.1.tar.gzCD keepalived-1.2.1./configure--prefix=/usr/local/keepalived--sysconf=/etc make make installcp/usr/local/keepalived/etc/rc.d/init.d/keepalived/etc/rc.d/init.d/cp/usr/local/keepalived/etc/sysconfig/keepalived/etc/sysconfig/cp/usr/local/keepalived/sbin/keepalived/bin/Chkconfig-

The HBase ha cluster is based on the Hadoop ha cluster, which requires 1 healthy Hadoop ha cluster environments before the HBase ha cluster is built. After the relevant hbase configuration, start HBase, only the main hbase start normal, standby hbase and region all did not start, the investigation found that the startu

Master firewall configuration unset interface e4 IP addresses e4 IP address deletion Set interface e4 zone Ha binds E4 and ha regions together Ssg550-> set NSRP Cluster ID 1 sets cluster group number SSG550 (M)-> set NSRP VSD ID 0 Sets the group number of the VSD, which can be used without input because the value of the default virtual security database (VSD) for the NetScreen firewall is 0. SSG550 (M)

Label:After the operation of MongoDB has a certain foundation, can finally pull the HA and architecture of the two tall concept. Before that, of course you have to figure out the MongoDB key feature:sharding.1. shardingShard is logically a subset of the entire data, which is physically the server that manages this subset. A shard can contain more than one server. If a shard contains multiple servers, each server has an identical copy of the data subse

Definition of HeartbeatThe Heartbeat project is an integral part of the LINUX-HA project and the most successful example of the current open source HA project, Linux-ha is High-availability Linux, the goal of this open source project is to: through the joint efforts of Community developers, Provides a clustering solution that enhances Linux reliability (reliabili

OutlineI. What is a highly available clusterIi. What is high availabilityThree, high availability cluster related conceptsIv. Heartbeat Version V1 exampleV. Heartbeat Example of V2 versionVi. Heartbeat Version V3 exampleI. What is a highly available clusterHigh-availability cluster, the English source for the higher availability Cluster, referred to as Ha Cluster, simply said, the cluster (Cluster) is a group of computers, as a whole to provide users

fault checking and business switching. A highly available cluster of only two nodes is also known as a dual-machine hot standby, even with two servers backing up each other. When one server fails, a service task can be performed by another server, which automatically ensures that the system can continue to provide services without human intervention. Dual-Machine hot standby is only a high-availability cluster, high-availability cluster system can support more than two nodes, provide more than

First, configure the heartbeat of the master node Heartbeat's main configuration files are ha.cf, Haresources, Authkeys, after the installation of the heartbeat, the default does not have these three files, can be downloaded from the official web site, can also be directly from the source directory extracted from the extraction, in the above installation process, We have put these three files in the/ETC/HA.D directory, detailed below. 1. Master configuration file (/ETC/HA.D/HA.CF) Each of the

[MySQL case] HA: GTID_MODE configuration inconsistent 1.1.1. HA: GTID_MODE configuration inconsistent [Environment description] Msyql5.6.14 [Error message] In the initial state, both the Master and Slave enforce-gtid-consistency and gtid-mode are enabled, and both of them are changed to off. in this case, Slave reports an error: Last_IO_Error: The slave IO thread stopsbecause the master has @ GLOBAL.

Oracle10g provides a web-based management tool dbcontrol, which is similar to the OEM tool of Oracle9i, but has greatly improved its functionality. When creating a database instance Oracle 10 Gb provides a web-based management tool db control, which is similar to Oracle 9i OEM tools, but has greatly improved its functionality. When creating a database instance Oracle 10 Gb provides a web-based management tool db control, which is similar to Oracle 9i OEM tools, but has greatly improved its

I have studied the high availability of databases and need to use Database Synchronization and backup. Below are some of my studies on MySQL HA. According to the HA solution provided in MySQL 5.0 Reference Manual, it mainly consists of the following types: Requirements MySQL Replication MySQL Replication + Heartbeat MySQL Heartbeat + DRBD MySQL Cluster MySQL + memcached

HA-Federation-HDFS + Yarn cluster deployment mode After an afternoon's attempt, I finally set up the cluster, and it didn't feel much necessary to complete the setup. So I should study it and lay the foundation for building the real environment. The following is a cluster deployment of Ha-Federation-hdfs + Yarn. First, let's talk about my Configuration: The four nodes are started respectively: 1. bkjia117: