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As the most cluster product in Oracle, RAC has many articles on Oracle RAC configuration on the Internet. However, in some wonderful articles, RAC cannot be configured successfully. The following is a detailed description of the relevant content. Because
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
machines to connect to each other, and SSH itself is required to connect, otherwise an error will be reported on the oracle cluster nodeTo create a raw device, you must modify the two configuration files on the node of the RAC machine.You also need to pay attention to the raw permission issues chmodchownNote: The raw device port numbers on both sides must be the same. Otherwise, an error will be reported,F
Summary of Oracle 11gR2 RAC cluster Service Startup and Shutdown Introduction: the source of this article is that one of my students recently set up a RAC cluster in the company, but the sequence and principle of its startup and shutdown are not very clear, I also found that many students have little knowledge about RAC
Tags: ETL kettle jdbc Oracle RAC1 problem Phenomena:Previously done Kettle connect an Oracle database for table extractionThe table input information for the script is as follows:Error message in the table input report when executing (script uploaded to Linux machine with sh command) :But in the machine with the Sqlplus command login can be successful:2 resolution process:After the problem, the first contac
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 after installation is complete)
Adjust the redo log file size in oracle rac, racredoAdjust the size of the redo log file under rac(1) view the current log information:Select * from v $ logfile;(The path in step 2 can be seen in the MEMBER column here. The redo file name is named by yourself, for example, redo07.log)(Note: The log group is now in 6 groups)(2) Add log files for each node: (add th
The OCR and Voting Disk backups in Oracle RAC are described in my blog: common maintenance tools and commands of Oracle RAC. Now I will explain it separately, because OCR and Voting Disk are too important for the RAC system.Oracle RAC
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 options they has available on their platform.
Non-RAC Environment Character Set Modification 1.1 Oracle Character Set Problem Summary 1.1.1 concept of oracle Character Set The oracle character set is a collection of symbols for the interpretation of byte data. It can be divided into different sizes and have an inclusive relationship.
Solution Process 1) understand the basic information The previous night, around, shut down RAC, restarted the minicomputer, restarted RAC, and found that four instances in two RAC groups started normally, and the other RAC instances failed to start normally. 2) the minicomputer engineer can diagnose the datavg and arch
Test Purpose: Single Instance database conversion to RAC databaseTest environment: Oracle 11.2.0.4Test method: Manual Conversion.First, install a set of RAC environments and restore single-instance databases to this environment through Rman (typically, in production environments, we build ADG from RAC to single-instanc
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 servers should be the same type of OS. Accor
There are a lot of friends who are confused about the 4 IPs when configuring Oracle 11GR2 RAC, this article explains here.Open a/etc/hosts file for a RAC nodeCat/etc/hosts# public IP192.168.1.138rac1.localdomain Rac1192.168.1.139rac2.localdomain RAC2#Private IP172.16.10.138rac1-priv.localdomain Rac1-priv172.16.10.139rac2-priv.localdomain Rac2-priv#Virtual IP192.1
Oracle RAC clusterRAC, short for real application clusters, is a new technology used in the new version of Oracle Database, It is a type of high availability and the core technology that Oracle databases support the grid computing environment. An example of how to connect an application to
The most outstanding performance of Oracle RAC clusters is high availability, which mainly includes load balance and failover. These technologies enable single point of failure (spof) to prevent normal access to the database by client applications, and load balancing between nodes by creating a service. This article describes the Oracle failover test in the
Tags: Name service access RAC Cluster DBA span color Ted ResourceScan conceptLet's start with what is called Scan,scan (single client Access name), which was launched by Oracle from 11g R2, and the client can load-balance connections to the RAC database via the SCAN feature. Scan provides a domain name to access the RAC
: modifythe/etc/sysctl.conf. #Usage: Logonasthesuperuser (' root '), andthenexecutethecommand:#. /6presysctl.sh #Author: Asherhuang echo "nowmodifythe/etc/sysctl.conf,but withabackupnamed/etc/sysctl.bak "cp/etc/sysctl.conf/etc/ Sysctl.conf.bak echo "fs.aio-max-nr=1048576" >>/etc/sysctl.conf Echo "fs.file-max=6815744" >>/etc/sysctl.conf echo "kernel.shmall= 2097152 ">>/etc/sysctl.conf echo" kernel.shmmax=1054472192 "> >/etc/sysctl.conf echo "kernel.shmmni=4096" >>/etc/sysctl.conf Echo "kernel
are changed, and the fault occurs. Therefore, everyone in the operation of the time do not blindly to do not grasp the matter, master each operation behind the principle and its consequences, so that the full preparation of the fallback method.There was a time when the-R changed the entire directory permission, resulting in an unrecognized ASM disk group.Changing the directory permissions according to the normal RAC is still not recognized, the main
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