netscaler ha

[Paid for help] If you are familiar with servers and HA users, please refer to the Linux Enterprise Application-Linux server application information. The following is a detailed description. The company has a project that requires dual-host hot standby, The hardware is configured with the same HP DL380 (5cpu) PCSERVER, Software environment: LINUX operating system, data interface software A (developed in JAVA, its main function is to read data throug

service configuration wizard automatically provides the name of the user account selected when the first node is installed. Use the same account used to install the first cluster node.4. Enter the account password if any) and click Next.5. In the next dialog box, click Finish to complete the configuration.6. The cluster service will be started. Click OK.7. Close the Add/delete programs.Configure cluster attributesRight-click ClusterGroup and click Properties. In order to test the system failove

configuration fileVI ha.cf//change to the following:Debugfile/var/log/ha-debuglogfile/var/log/ha-loglogfacility local0keepalive 2 #多长时间探测一次deadtime 30 # If the 30-second Ping does not #10秒ping不通会发出警告initdead #防止对方服务器重启预留一段时间udpport 694 #心跳线通讯端口ucast eth1 192.168.141.198 (SLA warntime). ve host address) Auto_failback Onnode master #你的主服务器的主机名 (can't write wrong) node slave #从的服务器的主机名ping 192.168.141.1 # (Ar

Developed every day, it is inevitable to listen to some technical forums. They are all professional words. If you have never heard of them, it is a stranger. Record them. ========================================================== ====================== High Availability: 1. Ha 2. Single-node failure is transparent to users, that is, it has no impact and is still in normal use. Extension: Vertical Scaling: become Superman (only improving the perf

-timedate net-snmp-libs libnet PyXML yum install libtool-ltdl-devel gettext pygtk2-libglade2. Installing Heartbeat ComponentsYou can go to download the relevant RPM software package, also can download from my attachment, because centos 6.5 reason, we can not do yum installation here, because it will conflict, so here use RPM to install.RPM-IVH heartbeat-2.1.4-12.el6.x86_64.rpm heartbeat-pils-2.1.4-12.el6.x86_64.rpm heartbeat-gui-2.1.4-12.el6.x86_ 64.rpm heartbeat-stonith-2.1.4-12.el6.x86_64.rpmI

In the first two articles, our team keepalived did the relevant introduction, the environment is still the same as before, this time we mainly introduce the Vrrp_script module, in the last introduction of keepalived basic ha function used vrrp_script this module, This module is specifically designed to monitor the service itself in the cluster, with the Track_script module, which can refer to monitoring scripts, command combinations, shell statements,

Note: My public key file is not under/root/hxsyl under/home/hxsyl/.ssh,Find/-name Id_rsaFind1.Run the command on each machine zkserver.sh start or run in the $zookeeper_home/bin directory./zkserver.sh start command. You can then use the command JPS to view zookeeper-initiated process Quorumpeermain.The zookeeper status can be viewed through the zkserver.sh status command. Normally there is only one leader in the machine, and the others are follow.2. Master node executionHDFs Zkfc-formatzkNote: T

First, the cluster concept:Cluster : Improve performance, reduce costs, improve scalability, enhance reliability, and task control room core technologies in the cluster. The role of the cluster : To ensure continuous businessCluster of three networks: Business Network , cluster network, storage networkIi. three types of clusters:HA: Highly available cluster --"The cluster under study" LP: Load Balancing clusterHPC: Distributed clustersThird, HA Mode

/lvs_dr.shPerformed on two rs: bash/usr/local/sbin/lvs_dr_rs.shWindows under Browser test accessWhen the above is done, the load balance of Rs can be realized, and each request is apportioned according to the weight setting.However, if a certain RS service is stopped, then the client request will still be directly on the RS that stopped the service.2. Add keepalived ServiceNote: Although we have already configured some operations, but below we use keepaliave operation and previous operation is s

website Link Hadoop profile home: Http://hadoop.apache.org/docs/r2.5.2/HDFS hapdoop ha full distribution configuration: http://hadoop.apache.org/docs/ R2.5.2/hadoop-project-dist/hadoop-hdfs/hdfshighavailabilitywithqjm.html Summary steps: Preparation: 1. Configuring the Java environment variable can be done in/etc/profile or configure in/root/.bash_profile 2. Configure password-free logins especially namenode can be password-free to each other 3. Prepa

First, the problem description Since Namenode is the brain of HDFs, and the brain is a single point, if the brain fails, the entire distributed storage system is paralyzed. The HA (high Available) mechanism is used to solve such a problem. Encounter such a problem, the first instinct is to think of redundant backup, backup way There are many kinds of predecessors have designed a meta-data backup solution, secondary Namenode and Avatarnode and

ResourceManagerThis configuration is complete and can be accessed by a browserMain Namenodehttp://172.30.0.118:50070Prepared Namenodehttp://172.30.0.138:50070--Verifying HDFs HAFirst upload a file to HDFsHadoop fs-put/etc/profile/profileThen kill the active Namenode, use JPS to view the PID or Ps-ef|grep HadoopDiscover that http://172.30.0.118:50070/cannot be accessed, http://172.30.0.138:50070/becomes activeDiscover Hadoop fs-ls/Still availableManually start the namenode118 that hangs out./hom

With regard to ha highly available deployment, Spark offers two scenarios: File system-based single-point recovery (single-node Recovery with Local file systems) Used primarily for development or test environments. Provide a catalog for spark to save the registration information for spark application and workers, and write their recovery status to that directory, and once master fails, you can restart the master process (sbin/ start-mast

This article uses the premise: from Noha to haZK effect: Maintaining a shared lock ensures that only one active nnJournal: Synchronizing meta data between two NNMachine allocation: Nn1 Namenode,dfszkfailovercontroller Nn2 Namenode,dfszkfailovercontroller Slave1 Datanode,zookeeper,journalnode Slave2 Datanode,zookeeper,journalnode Slave3 Datanode,zookeeper,journalnode 1, configure Core-s

Storm-1.0.1Configure cd/usr/local/soft/on the NIMBUS01 nodeTAR-ZXVF apache-storm-1.0.1. tar.gz CD apache-storm-1.0.1Vim conf/"Supervisor03"# # # # # of Storm Nimbus Nodes HA # # # Nimbus.seeds: ["nimbus01", "NIMBUS02"# # # # # # Storm Local Storage # # # Storm.local.dir: "/usr/local/soft/apache-storm-1.0.1/localdir"# # # # # # # # # # # # Storm Supervisor Nodes Worker Process # supervisor.slots.ports:-6700-6701-6702-6703# # # # # # # # # # # Selector

One, HA deploymentThe program selection for this experiment is heartbeat v2 + hearesources. Resources have IP and Httpd,filesystem not included.Prerequisites for configuring an HA cluster:(1) Consistent resources of each node, hardware or software environment(2) The time of each node is consistent to facilitate heartbeat transmission, using the NTP protocol to achieve(3) Between nodes need to communicate wi

To ensure the high availability of network applications, two firewall devices of the same model can be deployed at the edge of the network to be protected during the deployment of Juniper firewall to implement HA configuration. Juniper firewall provides three high-availability application configuration modes: master-slave mode, master-master mode, and dual-master redundancy mode. Here, we only describe the configuration of the master-slave mode. Firew

When connecting to a Hadoop cluster through the Java API, if the cluster supports HA mode, it can be set up to automatically switch to the active master node as follows. Wherein, clustername can be arbitrarily specified, with the cluster configuration independent, Dfs.ha.namenodes.ClusterName can also arbitrarily specify the name, there are several master write a few, followed by the corresponding settings to add the master node address.Private Static

If Hadoop turns on Ha, you need to specify some additional parameters when connecting to hive with the Java clientPackage Cn.itacst.hadoop.hdfs;import Java.io.fileinputstream;import Java.io.inputstream;import Java.io.outputstream;import Java.net.uri;import Org.apache.hadoop.conf.configuration;import Org.apache.hadoop.fs.filesystem;import Org.apache.hadoop.fs.path;import Org.apache.hadoop.io.ioutils;public Class Hdfs_ha {public static void main (string

There's a lot of spark ha configuration online, and recently I was looking at Wang Lin's spark video to pay for it. That person cow b blows very big, the ability should be some, but has the ability, not necessarily is the good teacher. First blowing China, blowing on the first to become the world. Even if you really are the first in the World, video (2. The 12th lesson in the Spark kernel decryption (11-43) is the wrong word about spark.deploy.zookeep