postgresql ha

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Drdb + heartbeat + nfs for Linux high-availability cluster (HA)

If the primary server goes down, the loss is immeasurable. To ensure uninterrupted services on the master server, you need to implement redundancy on the server. Among the numerous solutions for implementing server redundancy, heartbeat provides us with a cheap and scalable high-availability cluster solution. We use heartbeat + drbd to create a high availability (HA) cluster service in Linux. if the master server goes down, the loss is immeasurable. T

Hadoop2.0 qjm mode of HA configuration

Based on the article "Installation and basic configuration of Hadoop2.0" (see http://www.linuxidc.com/Linux/2014-05/101173.htm), this paper continues to introduce hadoop2.0 QJM (Quorum Journal Manager) mode of HA configuration (hadoop2.0 architecture, specific version is hadoop2.2.0). This article only describes the main preparation of HA manual switch, automatically switch to the next article continue to i

Build HA Based on RHEL6.3-KVM three-node Virtual Machine command line

We have been experimenting with the RedHat5 and 6 Versions of HA since January May of this year. I found the HA manual of version 6 on the Internet and found that although the project uses the dual-node mode most, if the dual-node mode is only for HA, A three-node or more arbitration disk is required. In addition, the HA

Ha high-availability cluster cluster under AIX

Installing the HA SoftwareFirst, install the softwareThe most stable version is 5.4.0, priority installation stable version 5.4Install depends on package base.data, cluster man pack installation failure reason is missing Base.data packageInstall all cluster. Packages that begin with, you can not install the Cluster.man packageSecond, hit the HA patchExecute the instructions before patching: Inutoc generate

VMware virtualization Technology's eight vsphere App ha deployment

OverviewApp Ha is an extension of VSphere ha, extending from the protection of virtual machines to application services that run on the protection of virtual machines. Vsphere App HA is a plug-in for vsphere Web Client. With VSphere app HA, you can define high availability for applications running on virtual machines i

Heartbeat v2 Implementation of HA Web based on haresources

Objective:The article cost the author a lot of time to write, reproduced please reply to obtain the author's consent!Achieve the goal:Use heartbeat and haresources to achieve high availability of web clustersTerminology Explanation:What is heartbeat:The Heartbeat project is an integral part of the LINUX-HA project, which implements a highly available cluster systemWhy to use heartbeat:High availability of services in Linux requires

Turn: Linux cluster-----ha discussion

Entities that connect several servers together and provide failover functionality through special software are what we call high-availability clusters. Usability refers to the system's uptime, in the 7x24x365 work environment, 99% of the availability refers to the year can have 87 hours 36 minutes of down time, usually in the critical service of this day more than the time of failure is unacceptable, so put forward the aforementioned error recovery concept, To meet the high availability requirem

Turn: Linux cluster-----ha discussion

Entities that connect several servers together and provide failover functionality through special software are what we call high-availability clusters. Usability refers to the system's uptime, in the 7x24x365 work environment, 99% of the availability refers to the year can have 87 hours 36 minutes of down time, usually in the critical service of this day more than the time of failure is unacceptable, so put forward the aforementioned error recovery concept, To meet the high availability requirem

Configuring an NFS-based MySQL ha cluster based on the Heartbeat V2 CRM implementation

the IP first, since the service starts with a clear need for the IP address of the resource. There is a difference between these two types of highly available resources.The steps to define a highly available resource are as follows: first define the IP address used by MySQL.650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/49/1B/wKiom1QPCFeDyGVEAAIIs6ptUT0433.jpg "title=" 2014-09-09 22_01_36-linux HA Management client.jpg "alt=" wkiom1qpcfed

Rock Mesh Section-hillstone-ha (high availability) Active/standby firmware version upgrade end experience

Okay, everybody.We often encounter high-availability, stacking, VRRP, and other dual-machine deployment scenarios in the common Enterprise Edge Network architecture, and in some of the cases described earlier, the basic is a two-machine deployment, a highly available enterprise networking form,So, the basic configuration is also described earlier, but does not describe how to upgrade the hardware in the state of the high-availability of the OS scenario, here because in the last week completed a

CentOS Build TFS Nameserver HA

backgroundTFSRequirements forGCC 4.1.2compile, two scenarios1is to useCentos5 (comes withgcc 4.1.2), 2UseCENTOS6putGCCreduced to4.1.2. I'm using the first method to successfully run TFS as aHAwhen the question came, the official request was to useHeartbeat 3.x,centos5is a2.x. Start selecting thecentos5under CompileHeartbeat 3successful, but also requires compilingPacemaker, compile the time encountered some problems, may be version matching, dependency is not congruent, even if compiled by consi

HA cluster configuration

First, what is HA cluster?ha (high available) is highly available, also known as dual-machine hot standby, for critical business, the simple understanding is that there are two machines A and B, the normal service is a machine, B machine standby, when a machine stop service, Will switch to the B machine to continue to provide services. Commonly used open source software with high availability is heartbeat a

Linux HA installation and configuration example

In linux, the HA installation configuration example first installs HA (yast-I heartbeat) server1: 192.168.1.100server2: 192.168.1.101 on the two servers respectively. edit/etc/ha. d/authkeysTxt code auth 3 #1 crc #2 sha1 HI! 3. md5 ciaoskey edit/etc/ha. d/ha. cfTxt code logf

configuring VMware HA Problems and how to resolve them

look at the status of each host in a virtualized environment today, and in the process of viewing, you'll see that almost every host has a warning:vSphere ha Heartbeat data storage number is 1, less than required: 2This problem Baidu saw a lot of blog post reprint is a warning to close the practice, I feel a little bit, first of all, this question is nothing to us understand only said the practice, then encounter such problems in the future, we can on

Linux HA Cluster High-availability cluster HEARTBEAT2

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 a cluster node. The main function of high-availability cluster software is to automate fau

In addition to VMware HA virtual machines, there are other security options

System Administrators using the complete vSphere solution use VMware HA to ensure the continuous running of virtual machines. However, if you are using the free version of ESXi, you will not be able to use the VMware HA feature. There are other options to protect your virtual machines by achieving high availability and ensure they are running properly. Before considering other options, let's look at what VM

RHCS + GFS (Red Hat HA + GFS)

1. environment Introduction ha management end: luci: 192.168.122.1ha node ricci: 192.168.122.34192.168.122.33 use iscsi shared disk co-ha node on iis82 to create GFS file system 2. iscsi disk sharing server: LVM is used for sharing to facilitate later expansion. [root @ 12782 ~] # Fdisk-cu/dev/sda 1. Environment Introduction Ha management end: luci: 192.168.122.1

Juniper SSG 550m HA Configuration

Here the ETHERNET0/3 is the HA interfaceCLI Command line configurationSsg-550m-1 (M)Set NSRP Cluster ID 1Set NSRP rto-mirror SyncSet NSRP rto-mirror routeSet NSRP Vsd-group ID 0 Priority 50 (configuration Vsd-group ID 0 precedence)Set NSRP Vsd-group master-always-exist (configuration always has one device as master)Set NSRP Monitor Interface ethernet0/0Set NSRP Monitor Interface ETHERNET0/1Set NSRP Monitor Interface ETHERNET0/2SaveSsg-550m-2 (B)Set NS

Install and configure Rose ha

Install and configure Rose ha 1.1.1 install Rose ha Copy three installation files of roseha to/data/install to facilitate installation of the two hosts. Before installing Rose HA, modify the hosts file and enter the corresponding host name and IP address. The modification method is the same as that of the Windows Hosts file, we can enter the host name. Modificati

Chd4b1 (hadoop-0.23) for namenode ha installation Configuration

Chd4b1 (hadoop-0.23) for namenode ha installation Configuration Cloudera chd4b1 version already contains namenode ha, the Community also put namenode ha branch HDFS-1623 merge to trunk version, can achieve hot backup of dual namenode, but currently only supports manual switch, does not support automatic switch, switch progress in the community see: https://issues

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