oracle rac cluster

debugging finished, on-line operation Normal. But not long, the Oracle RAC Cluster will appear a good one will be bad situation, log in check log, check application, all find no problem, finally had to personally to the computer room. Look back and forth, look at the display of the indicators; It really does find the problem: The heartbeat switch Port has a ligh

applied as a special Oracle instance, with its own SGA, but without a continuous dictionary. In RAC, each cluster node has and has only one individual ASM instance. When started, each instance detects ASM disk group resources in the grid infrastructure through initialization parameters in the cluster software. Each in

location:/tmp/deinstall2013-09-06_10-23-18AM/logs/asmcadc_check2013-09-06_10-28-14-AM.log ASM configuration was not detected in this Oracle home. Was ASM configured in this Oracle home (y | n) [n]: y (input)ASM was not detected in the Oracle Home ######################### Check operation end ############ ############# ####################### Check operation summ

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 shared storage device is also required. At the same time, two types of software are required: Cluster software and RAC components in the Oracle database. At the same time, the operating systems on all

The application workload can be defined as services in Oracle 10 Gb, also known as services. It can be used in a single instance or separately used and managed in RAC. Therefore, the entire database load can be divided into multiple different services. The management service can simplify the management of users or sessions. Second, the importance of services is reflected in

[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

Label:Said too classic, dare not translate, directly on the original. From: Network protocols and Real application Clusters (document ID 278132.1) PURPOSE------- Purpose of this document are to give DBAs and Systems Administrators interestedIn Real application Clusters an overview and a comparison of network protocolsAvailable. SCOPE Application------------------- DBAs and IT professionals may use this note for their physical cluster layoutAnd the

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 forgetfu

( ) and a lower stack anchored by the Oracle high Availability Services Daemon ( ohasd ). These stacks has several processes that facilitate cluster operations. The following sections describe these stacks in more detail: The Oracle cluster consists of two technology stacks: the upper stack is controlled by the CRS

OCR is like a Windows registry that stores all configuration information related to the cluster and RAC database. It is also a public configuration, that is, multiple nodes share the same configuration information. Therefore, this configuration should be stored on the shared disk. This article mainly describes the OCR of the cluster and the amnesia caused by OCR

Oracle Performance Myths--mts,rac, partitioning, parallel queries To improve performance, we've done a lot of testing on the methods or scenarios that the Oracle database itself providesMainly include:Shared server mode (MTS)Cluster technology (clustering), RACPartitionParallel processing (mainly parallel queries) The

for creating a disk group.3) create a password file[Oracle @ node1 ~] $ Su-oracle[Oracle @ node1 ~] $ Cd $ ORACLE_HOME/dbs[Oracle @ node1 ~] $ Orapwd file = orapw + ASM password = oracle4) create a directory structure[Oracle @ node 1 ~] $ Su-

Oracle RAC Full name: Oracle Real Application Clusters, that is, Oracle Real-Time ApplicationProgramCluster, so that different applications can access multiple Oracle instances as if accessing one Oracle instance (of course, the

Tags: style blog using strong file dataOracle RAC 10.2 storage options on LinuxBlog Category: Oracle Oraclelinux Project Management configuration ManagementOracle clusters require storage of software and data Project Content Minimum disk space Clusterware Software Cluster software 500M (does not change

Tags: Oracle 10g RAC Rebuilding CRS1.crs file is corrupt, remove CRS informationRAC10G1 node:[Email protected] install]# ./rootdelete.shShutting down Oracle Cluster ready Services (CRS):Stopping resources.Error while stopping resources. Possible CAUSE:CRSD is down.Stopping CSSD.Shutting down CSS daemon.Shutdown request

Oracle RAC is a clustered database that allows for seamless failover of load balancing and failures. How do you know that the RAC database has implemented these features, and then perform a functional test on this?One, load balancing testThe load balancing of a RAC database is the load balancing of a database connectio

Label:What are the brain fissures in Oracle Clusterware and RAC From:What's Split Brain in Oracle clusterware and Real application Cluster (document ID 1425586.1) Suitable for:Oracle database-enterprise edition-version 10.1.0.2 and laterInformation in this document applies to any platform. Objective:This article explai

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

Turn: http://blog.itpub.net/22664653/viewspace-722463/The logging system in an Oracle RAC environment is more complex than a single system: see:Brief Introduction to the Oracle cluster environment in the log architecture, in the face of problems, you can quickly find the required log files, timely positioning problems

-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