Understanding of DRM in oracle 10g RAC, racdrmSummary of DRM1. What is DRM?Dynamic Resource Management (DRM) is a new feature of oracle 10 Gb. in oracle rac environment, ORACLE uses GRD (Global Resource Service) to record Resource
the LBA algorithm, thus completing the whole client-server connection process. Simplify as follows:Client, scan listener, local listener, local instanceYou can also interpret scan as a virtual hostname, which corresponds to the entire RAC cluster. The client host simply accesses any node of the DB cluster through this scan name. Of course, the nodes that are acc
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
Tags: node get sql--... acdb node cluster cal offline
Start RAC
The manual start is initiated in the order of has, cluster, database, with the following specific commands:
Start has (high availability Services), must be the root user
[Email protected] ~]# Crsctl start hasCrs-4124:oracle H
I. Problem Description
OS: RedHat 5.8
Database: 11.2.0.3
2 node RAC.
When using RMAN for backup, the following error is reported:
ORA-00245: control file backup failed; target is likely on a local file system
This issue only exists in RAC environments after Oracle 11gr2.
2. ORA-245 trigger conditions
ORA-00245 errors may occur in five of the following environme
1. GSD global services daemonDescription of Oracle official documentation
The global services daemon (GSD) runs on each node with one GSD process per node. the GSD coordinates with the Cluster Manager to receive requests from clients such as the dbca, em, And the srvctl utility to execute administrative job tasks such as instance startup or shutdown. the GSD is not an
Operating Environment:
Server:oracle 10g RAC
Client:toad for Oracle 8.6
Description of the problem phenomenon:
Set a breakpoint on stored procedure load in editor, followed by the following error prompts:
Ora-12560:tns:protocol Adapter Error
Cannot connect debug session. In, to debug, connected to a RAC instance you must have entries for the individual
experience
? 1. Configuring the Cluster Hardware
o 1.1 Minimal hardware List/system Requirements
§1.1.1 Hardware
§1.1.2 Software
§1.1.3 Patches
O 1.2 Installing Disk Arrays
O 1.3 Installing Cluster interconnect and public network hardware
? 2. Creating a Cluster
O 2.1 hacmp/es Software Installation
o 2.2 Configuring
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
@ rac1 bin] $./runInstaller-updateNodelist ORACLE_HOME =/u01/app/oracle/product/10.2.0/db_2 "CLUSTER_NODES = rac1, rac2"
Starting Oracle Universal Installer...
No pre-requisite checks found in oraparam. ini, no system pre-requisite checks will be executed.
'Updatenodelist' was successful.
5. Clear configuration information on rac
On the rac3 node:
[
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
ORACLE RAC principle in an application environment, all servers use and manage the same database in order to spread the workload of each server, requiring at least two more servers on the hardware, and a shared storage device. It also requires two types of software, one is cluster software, the other is the RAC compone
Use VBox to simulate storage migration environments, os:rhel5.9,db:oracle 10.2.0.4 RAC ASM 2Nodes.
ASM uses extern redundancy, which does not use ASM's rebalance functionality, and OCR and Votedisk are stored in raw.
Migration includes Controlfile,datafile,tempfile,spfile,ocr,votedisk.
Path before migration
OCR/DEV/SDF1/DEV/RAW/RAW1,/DEV/SDF2/DEV/RAW/RAW2
VOTEDISK/DEV/SDG1/DEV/RAW/RAW3,/DEV/SDG2/DEV/RAW/RAW4,/dev/sdg3/dev/raw/raw5
ASM +data/dev/
Vip/public/private IP Differences in RAC environmentsEach node to 2 network card, 3 IP, virtual IP or called the business IP, a single network card when it can "drift" to the other network card is to continue to provide servicesIn the Oracle RAC Environment, each node will have multiple IP addresses, respectively, PUBLIC/PRIVATE/VIP, what is the difference betwee
Tags: OracleOracle Study-aix6.1 Building Oracle 10GR2 RAC (1)Environment:Operating System: AIX 6100-09 (SP3)Cluster Software: CRS 10.2.0.1Database: Oracle 10.2.0.1There are two ways in which RAC can be used to build an AIX platform based on shared storage:1. Establish shared
[Translated from mos] What is split-brain in Oracle Clusterware and RAC? mosclusterware
What is split-brain in Oracle Clusterware and RAC?
Source:What is Split Brain in Oracle Clusterware and Real Application Cluster (Document ID
Tags: Oracle training Oracle Tutorial Oracle Database Tutorial Oracle Certified Oracle Video TutorialFull set of Oracle database installation implementation video course packages [involving RA
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.