oracle rac architecture

) focus on the horizontal expansion of the database, improve the performance of the database. • High-availability clusters (availability Cluster,hac) focus on ensuring database applications continue. Most of the database clusters focus on this. • High-security cluster (CLUSTER,HSC) focuses on disaster tolerance. Only Oracle RAC can achieve the three scalable distributed database architectures (i)

more information about the replicel database and instance description, see Oracle instances and Oracle databases (Oracle architecture)RAC database and recovery:A rac database can have multiple instances. That is to say, SGA + bac

On the AIX platform, Oracle software that is tar from the RAC environment is directly extracted to the new machine and the target environment is stand-alone, and the RAC option needs to be turned off. RAC off 1. Login as the Oracle software owner and shutdown all database

root root 4096-rwxrwxr-x 1 root root 3795 Jan runcluvfy.sh-rwxr-xr-x 1 root root 3227 runinstallerDrwxrwxr-x 2 root root 4096 SshsetupDrwxr-xr-x root root 4096-rw-r--r--1 root root 4228 welcome.html 2. Install Cvuqdisk on both nodes [[Email protected] grid]# CD rpm[email protected] rpm]# LLTotal 12-rw-rw-r--1 root root 8173 Jul cvuqdisk-1.0.7-1.rpm[Email protected] rpm]# RPM-IVH cvuqdisk-1.0.7-1.rpmPreparing ... ########################################### [100%]Using t

First, unpack the cluster kit; Gunzip 10201_clusterware_linux_x86_64.gz CPIO-IDMV The place where the decompression is placed requires the permission of the Oracle user Second, start installing the Oracle RAC Cluster Kit, 2.2.1. Shut down the two-node firewall before the installation, SELinux otherwise it cannot be installed by the 2.2.2. Modify the system

The Data Guard is Oracle's remote replication technology, which has physical and logical points, but in general it needs to have a separate system in place, where two hardware configurations can be different, but the software structure of the two systems is consistent, including software versions, directory storage structures, As well as the data synchronization (in fact, is not real-time synchronization), the two systems as long as the network is available, is a remote disaster-tolerant solutio

hierarchy of tree graph)First floor OHASD logs are located at: $Grid _home/log/ The second layer: (OHASD agent) Cssdagent logs are located at: $Grid _home/log/ Cssdmonitor logs are located at: $Grid _home/log/ Orarootagent logs are located at: $Grid _home/log/ Oraagent logs are located at: $Grid _home/log/ Third tier (resources) CSSD logs are located at: $Grid _home/log/ CRSD logs are located at: $Grid _home/log/ CTSSD logs are located at

Data Schema Primary: The code is as follows Copy Code hostname databasename unique_dbname INSTANCE_NAME RAC1 orclpd orclpd ORCLPD1 rac2 orclpd orclpd ORCLPD2 Standby:HOSTNAME DATABASENAME Unique_dbname instance_nameRAC21 ORCLPD Orclst Orclst1RAC22 ORCLPD Orclst Orclst2 RAC ASM DiskGroup (vote) ASM DiskGroup (Database managefile) ASM DiskGroup (Recovery Manage)Primary DATA DATA1 DATA2Standby DATA DATA1 DATA2 [

Failover Discussion When designing an application with the opportunity RAC, developers and designers need to face the fact that even the best hardware is not 100% reliable. Using RAC can reduce the impact of instance faults, but some additional measures are required on the application end to shield the impact of faults on the application. However, not all applications support

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 based on Oracle 10g

From a single instance to RAC, the architecture is also built by the RAC cluster and clusterware cluster. In essence, RAC databases and single-instance databases are not much different. data files and control files are shared, but each instance has its own independent redo log group; for the automatic undo management m

An analysis of the evolution of the RAC architecture from a single instance to RAC. The architecture is also built by the RAC cluster and Clusterware cluster. (1) The significant changes of SGA www.2cto.com SGA are saved by a GRD: ① PCM Lock information ② bitmap of node heal

Tags: let stp knowledge iptables Owner system SPFile splay Post Oracle LINUX 6.3 + Oracle 11.2.0.3 RAC + vbox Installation documentation 2015-10-21 12:51 525 people read Comments (0) favorite reports Classification:Oracle RAC Copyright NOTICE: This article for Bo Master original article, without Bo Master permission

. Patching one node at time The Opatch strategies discussed above (All-Node, Min. down-Time, and Rolling) presumes that all nodes will be patched at the same time. additionally, each node can be patched individually, at different times, using the "-local" key word, which will patch only the local node. Oracle rac Data Synchronization The situation you mentioned is a bit incredible. The lock mechanism do

AIX 5.3 Install Oracle 10g RAC Error Collection--9i RAC PresentSystem environment:Operating System: AIX 5300-08Cluster Software: CRS 10.2.0.1Database: Oracle 10.2.0.1System Architecture Diagram650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/26/9D/wKioL1NsV8Lw9ekFA

Full explanation of Oracle 10g RAC Installation Directory1. ORACLE Database RAC description... 1-21.1RAC system description... 1-21.2 preparations before installation... 1-21.2.1 hardware preparations... 1-21.2.2 quasi-work on software... 1-22. Installation preparation... 2-32.1 modify the network configuration file...

as the logical volume manager of the cluster, you can easily monitor a single-instance Oracle database without interruption. When a node fails, the database is automatically migrated to the slave node. Based on the size of the initialization parameters fast_start_mttr_target and recovery set, this failover may be very fast. However, as part of the Failover process, the user's database connection will be disconnected. Active/passive mode can be enable

In Oracle 11g RAC, it is found that both the Solaris and GSD services are in the offline status, which is the default situation of Oracle 11g RAC. Even so, the use of the database is not affected, because the resource for the WLM is used, WLM is available in 11.2.0.2. GSD is used to support interaction tools such as db

connected, will continue to try, until all the VIP addresses appearing in Address_list in full order until the end of the attempt. The Failover of this client when connecting to an Oracle database is not only applicable to the RAC environment, but also to the Data Guard environment. As shown below:description= ( failover=on) ( address_list= (load_balance=off) (address= (protocol=tcp) (host=

In the Oracle RAC environment under VMWare, multi-path images of OCR or votingdisk are not enough for shared storage or need to be added to a new shared disk, we can add shared storage through the command line under VMWare, and then append these new disks to the virtual machines one by one. The following is a detailed description. 1. Add a virtual disk # Here we will add two shared disks for the virtual ma