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Oracle RAC also has ha (high availiablity) and lb (loadbalance). And its high availability is based on failover (failover). It means that the failure of any node in the cluster will not affect the user's use, the user connected to the failed node will be automatically transferred to the health node, from the user experience, is not feel this switch. The Oracle 1
Original link: http://tech.it168.com/a2012/0814/1384/000001384756_all.shtmlDifferent cluster products have their own characteristics, RAC features include the following points:• Dual-machine parallel. RAC is a parallel mode, not a traditional master and standby mode. That is, all members of the RAC cluster can receive client requests at the same time.• High avail
Turn RAC off (Oracle 12C note) Turn RAC off (Oracle 12C note) Check RAC status [Grid @ rac01 ~] $ Crsctl check crs CRS-4638: Oracle High Availability Services is online CRS-4537: Cluster Ready Services is online CRS-4529: Cluster
....... If the table does not have a primary key or a unique key, a warning is generated, for example:22:53:11 warning OGG-00869 no unique key is defined for table udppackportset. All viable columns will be used to represent the key, but may not guarantee uniqueness. keycols may be used to define the key. Ggsci (Rac1) 19> Add trandata dyulcentermanage .*......Ggsci (Rac1) 20> Add trandata dyacdb34 .*......Ggsci (Rac1) 21> Add trandata dyulcenterm_bak .*...... There is no primary key or unique ke
Tags: HTTP://BLOG.ITPUB.NET/22664653/VIEWSPACE-722463/: The log system in an Oracle RAC environment is more complex than a single system: see: A brief introduction to the log architecture in the Oracle cluster environment, In the case of problems, you can quickly find the required log files, timely location problems ~ 1.Orac
Tags: style blog http io ar color OS using SPOracle RAC (12.1) installs virtual machines on Linux, step-by-step wizardtoday we will see how to installC version 1 RAC (real application cluster) database 2 Linux 64-bit virtual machineuse vmware or Oracle VirtualBox. Oracle's "C" C represents "Cloud"There are some important and interesting changes when installing a
Online Online Rac2 stableOra. Mgmtlsnr[Grid@rac1 ~]$ crsctl status res-t |grep-a 2 SCANOra. Listener_scan1.lsnr1 Online Online Rac2 stableOra. Mgmtlsnr--Ora. Racadg-scanlsnr_scan1_net2.lsnr1 Online online Rac1 stableOra.cvu[Grid@rac1 ~]$– Check the Listening status[Grid@rac1 ~]$ netstat-an |grep 1521|grep LISTENTCP 0 0 169.254.242.79:1521 0.0.0.0:* LISTENTCP 0 0 192.168.60.61:1521 0.0.0.0:* LISTEN-----rac1-privTCP 0 0 192.168.56.63:1521 0.0.0.0:* LISTEN-----RAC1-VIPTCP 0 0 192.168.56.61:1521 0.
[Oracle] Some Common commands in RAC (1) Node layer: Olsnodes -N: displays the number of each node. [Oracle @ rac1 ~] # Olsnodes-n Rac1 1 Rac2 2 2 -P: displays the name of the network interface used by each node for private interconnect. [Oracle @ rac1 ~] # Olsnodes-p Rac1 rac1-priv Rac2 rac2-priv -I: displays the VIP
4 scripts are required to perform RAC installation 1) $ORACLE _base/orainventory/orainstroot.sh (performed at end of Clusterware) 2) $CRS _home/root.sh (performed at end of Clusterware) 3) $CRS _home/bin/vipca.sh (the script is automatically invoked when the second node executes $crs_home/root.sh) 4) $ORACLE _home/root.sh (after installing the database to per
Frequent alerts for crsd. log of ORACLE RACOracle rac environment, x86_64 Oracle 10.2.0.1, crsd. frequent log Warnings: 00:39:14. 723: [CRSEVT] [2707291024] 0 CAAMonitorHandler: 0: Action Script for resource 'ora. RAC. RAC1.inst 'stdout redirection failed for '/u01/oracle/pr
OCR is equivalent to the Windows registry. For Windows, all software information, users, configurations, and security are stored in the registry. In the same way, all cluster-related resources, configurations, nodes, and RAC databases are stored in this warehouse. If OCR is damaged, the cluster Service Startup exception occurs. You need to fix OCR. Therefore, OCR management and maintenance are very important for the entire cluster. This document descr
Oracle 11g RAC listener offline After the Oracle 11g RAC listener has changed the network, the listener process offline appears, and the two nodes are switched frequently. Check the log/var/log/message to find frequent registration and revocation actions. Listening log/u01/app/orac
Resolving Oracle clients can connect to 11g RAC VIP, but cannot connect scan IP issues Some time ago configured a set of HP ux11.31 oracle11g R2 RAC, after the configuration is completed, the client can connect VIP and Scan IP connection database, remote clients can only connect VIP access to the database, through the scan IP access to the database can not connec
Oracle RAC also has HA (High Availiablity) and LB (LoadBalance), and its High availability is based onFailover (Failover)It means that the failure of any node in the cluster will not affect the user's use, and the user connected to the faulty node will be automatically transferred to the healthy node. In terms of user experience, this switchover is not felt. Oracle
Oracle 10g rac ip/VIP address modification exampleI. Preparations 1. Database Information Operating system version: OEL5.4 x64Database Version: Oracle 10.2.0.5 x64 RAC2. IP address information Note: The server host name cannot be changed. If you want to change the name, you need to reinstall CRS to solve the problem. It is better to reinstall it.The environment i
Oracle 11gR2 RAC installation error-clock not synchronized System Environment: Operating System: RedHat EL5 Cluster: Oracle GI (Grid Infrastructure) Oracle: Oracle 11.2.0.1.0 : RAC System Architecture For
Tags: Oracle 12c RAC ClusterEnvironment preparationNode One: CentOS 6.8 x86-64CPU:4C Memory: 8g swap:8gBusiness ip:192.168.50.20 Private Network ip:10.98.50.20Node two: CentOS 6.8 x86-64CPU:4C Memory: 8g swap:8gBusiness ip:192.168.60.21 Private Network ip:10.98.50.21Database and cluster Software:Linuxamd64_12102_grid_1of2.zipLinuxamd64_12102_grid_2of2.zipLinuxamd64_12102_database_1of2.zipLinuxamd64_12102_da
Oracle Log Full system disk is full, causing the database to hang up and the Archivelog log is full, but the database is not open, unable to login, fortunately, can also go to Mount state. Workaround:1. According to the error View appearance: CRS service downCrs-0184:cannot communicate with the CRS daemonDelete/var/tmp/.oracle DirectoryTo delete an Oracle ALTER L
In Oracle RAC, in addition to the TFA Method Based on the client, there is also the TFA Method Based on the server. You can regard the TFA method of the server as an upgraded version of the TFA method of the client. The TFA on the server must be configured on the server. This is done through the Service. This article mainly describes how to configure the TFA of the server through service in
4096dec1101:02racgdrwxr-x---2gridoinstall4096dec 1101:02srvmdrwxrwxr-x2gridoinstall4096dec1101:02 xag[[emailprotected]rac1]$However, in the 12c, there is still the above directory structure, but there is nothing in the content. Since 12c, the log structure of the RAC has changed.There are two types of RAC in 12c:1. Standard ClusterName of Alert Log:alert.logLocation of alert log: $
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