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/ASMDISK2Brw-rw ---- 1 oracle oinstall 8, 23 Sep 10 23:36/dev/oracleasm/disks/ASMDISK3Brw-rw ---- 1 oracle oinstall 8, 24 Sep 10/dev/oracleasm/disks/ASMDISK4Brw-rw ---- 1 oracle oinstall 8, 25 Sep 10/dev/oracleasm/disks/ASMDISK5You can also view the information as follows:[Root @ node1 ~] # Service oracleasm listdisksASMDISK1ASMDISK2ASMDISK3ASMDISK4ASMDISK5To del
cluster time synchronization service to provide synchronization services in the cluster, you need to uninstall the Network Time Protocol (NTP) and its configuration.To deactivate the NTP service, you must stop the current NTPD service, disable the service from the initialization sequence, and delete the ntp.conf file.To complete these steps on Oracle Enterprise Linux, run the following command on two Oracle
Common maintenance commands for Oracle 10g RAC: status of all instances and services [oracle @ vzwc1 ~] $ Srvctl status database-d zwc Instance zwc1 is running on node vzwc1 Instance zwc2 is running on node vzwc2 status of a single Instance [oracle @ vzwc1 ~] $ Srvctl status instance-d zwc-I zwc1 Instance zwc1 is runni
OCR and voting Disk backups in Oracle RAC are described in my blog: oracle RAC Common maintenance tools and commands , and now take it separately to make a note, because OCR and voting disk Is too important for a RAC system.Oracle RAC
Migrate a single oracle instance to RAC through dataguard One instance primary to RAC standbyDataGuard Configuration: Primary Standby Clusterware Oracle Database 11g Enterprise Edition Release 11.2.0.4.0-64bit 11g R2 Grid Infrastructure (11.2.0.4) Cluster Nodes Cltrac1 Srv
The project process is as follows:1. RAC Installation1. Experimental Platform: Oracle 10gR2 RAC + RHEL 5.4 + VMware-server-1.0.92. installation steps:(1) system requirements:Operating System: Red Hat 5.0 or 5.4Memory: 800 mbSwap space: 2048 MHard Disk: 10 GBNIC: 2 (public IP + Virtual IP, priv IP)Host node: 2 (node1, node2)Storage Device: 1 (DB files)(2) Network
Football and oracle series (4): from Brazil to Germany, think of the different RAC topology comparison !, OracleracFootball and oracle series (4): from Brazil to Germany, think of the different RAC topology comparison! Preliminary review: I was going to say that tonight, I thought it would be the second semi-finals th
Routine maintenance and troubleshooting of Oracle 11G R2 slave uard 1. About the Forced Logging ModeSome DDL statements can avoid writing redo logs by specifying the NOLOGGING clause (the purpose is to increase the speed, which is indeed valid in some cases). After specifying the database as the force logging mode, the database records all operations except the temporary tablespace or temporary rollback seg
1. RAC global wait Event Description In the RAC environment, the most common wait events related to global cache adjustment are global cache Cr request, global cache busy, and equeue. When a process needs to access one or more blocks, Oracle first checks whether the block exists in its cache, the shared access permission is granted to these blocks through global
Oracle RAC background process Introduction There are more processes in the Oracle RAC database than in a single instance database. These processes are unique to RAC and are set to implement cluster database functions. This article will introduce
-brain mode caused by the network.If I have three RAC instance nodes, namely A, B, and C, when node A goes down, I try to stop the response resource in 11 GB and then remove the node, so why does it remove the node? That's because when split-brain occursWhen split-brain occurs, it is divided into two parts: A is A part of the vote for 1, BC is A part of the vote for 2, then more election will select the party with more votes, thus removing; this is an
In the RAC environment, Oracle uses GRD (Global Resource Service) to record the Resource information of each RAC node. The Resource information of each RAC node is recorded by using GCS (Global Cache Service) and GES (Global Enqueue Service) these two services are managed. In RAC
$thread does does show all the threads:--ALTER DATABASE enable public thread 2; --Repeat for other threads if applicable 4. Close all instances of the database $ srvctl Stop database-d Orcl-o Immediate 5. Back up the current control file 6. Make sure that the instance settings are for thread 1 Instance = 1 thread = 1 7. Set the cluster_database in the parameter file to FalseIf you are using SPFile: sql> startup Nomount sql> alter system set CLUSTER_DATABASE=FALSE Scope=spfile; sql> shutdown
Label:OCR is like a registry of Windows that stores all the configuration information associated with a cluster, RAC database. It is also a common configuration, which means that multiple nodes share the same configuration information. Therefore, the configuration should be stored on the shared disk. This paper mainly describes the OCR of cluster and the forgetfulness problem of OCR based on Oracle 10g
The day before yesterday, according to the experiment steps described in RAC and STREAM in oracle rac, a similar experiment environment was set up on HP rx8640, and the experiment failed. Yesterday, I found an article "Learn oracle stream step by step" on the Internet. I first succeeded in setting up an experiment plat
Tags: RAC stores dual live across data centersORACLE RAC was designed to be dual-live across data centers, designed to load balance and high availability for multiple hosts with shared storage in a data center. But since its architecture does have the potential to load balance and high availability across data centers, several storage vendors have expanded its use environment and presented solutions across
In an application environment, all servers use and manage the same database to distribute the workload of each server. The hardware requires at least two services. In an application environment, all servers use and manage the same database to distribute the workload of each server. The hardware requires at least two services. In an application environment, all servers use and manage the same database to distribute the workload of each server. The hardware requires at least two servers, A sh
There are many articles on Oracle RAC configuration on the Internet. However, according to these articles, Oracle RAC may not be successfully configured. Because RAC itself is a very complex software, and most of these documents only introduce how to do it, rather than how t
[Oracle] RAC deletes a node Environment: OS: OEL5.6 RAC: 10.2.0.1.0 There are currently three rac1, rac2, and rac3 nodes. The following describes how to delete a rac3 node. 1. Delete the database instance on the rac3 Node [Oracle @ rac1 ~] $ Dbca-silent-deleteInstance-gdbName RACDB-instanceName RACDB3-sysDBAUserName sy
I. Problem Description Install RAC of 11.2.0.1 on Oracle Linux 6.1 and run the root. Sh script when installing grid. The error is as follows: [Root @ Rac1 bin] #/u01/APP/11.2.0/GRID/root. Sh Running Oracle 11g root. Sh script... The following environment variables are Setas: Oracle_owner = Oracle ORACLE_HOME =/u01/AP
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