oracle rac issues and solutions

procurement. More and more enterprises are willing to apply clustering solutions to their systems to reduce costs and improve system availability.　　Five, high throughputRAC is a logical body consisting of multiple servers that can receive more client requests than a single database server. This can be very evident in systems that require high throughput. In a RAC schema, multiple instances are distributed

Label:Oracle RAC Learning notes: Basic concepts and Getting Started April 19, 2010 10:39 Source: Book's Blog book Editor: Xiao Xiong【Technical Development Technical Articles】Oracle 10g Real Application Clusters introduction1. What is clusterA cluster is made up of two or more independent, network-connected servers. Several hardware vendors have been providing a variety of requirements for cluster performanc

Recently, there have been issues with access to sysdate return error times in some RAC environments, which often occur when database links are created through listener, and in most cases are related to time zone settings. In this article we will explain how to diagnose this problem. This article applies to version 11.2.0.2 and above. First, introduce the knowledge involved in the problem. 1. Starting from

Recently, there have been issues with access to sysdate return error times in some RAC environments, which often occur when database links are created through listener, and in most cases are related to time zone settings. In this article we will explain how to diagnose this problem. This article applies to version 11.2.0.2 and above. First, introduce the knowledge involved in the problem. 1. Starting from

Label:Introduction to cluster concept (i) Overview: write down the original intent and motivation of this document, derived from the Oracle Basic operating Manual of the previous article. The Oracle Basic Operations Manual is a summary of the author's vacation on Oracle's foundational knowledge learning. Then form a summary of the system, a review review, the other is easy to use. This document is

security of the database, once lost, it is difficult to find back. Therefore, it is hoped that through the establishment of database clusters, the redundancy of the data set, the backup data to ensure security. Classification of database clusters Database cluster technology is a technology that combines multiple servers to form a cluster to achieve comprehensive performance better than a single large server, this technology can not only meet the need of application, but also save the investment

] # chkconfig iptables -- list Iptables 0: off 1: off 2: off 3: off 4: off 5: off 6: Off 2. commented out the following file: [Root @ Rac1 TMP] # Cat/etc/PAM. d/Other # % PAM-1.0 Auth required pam_deny.so Account required pam_deny.so Password required pam_deny.so Session required pam_deny.so 3. Delete related socket: # Rm-F/usr/tmp/. Oracle /* # Rm-F/tmp/. Oracle /* # Rm-F/var/tmp/.

Oracle RAC runs on top of the cluster, providing the highest levels of availability, scalability, and low-cost computing power for Oracle databases. If one node in the cluster fails, Oracle can continue to run on the remaining nodes. Oracle's main innovation is a technology called cache merging. Cache merging enables n

-------------------------------------------------------------------------------- name target State server state_details implements cluster resources restart ora. ASM 1 online linux2 started ora. crsd 1 online linux2 ora.css D 1 online linux2 ora.css dmonitor 1 online linux2 ora. ctssd 1 online linux2 observer ora. diskmon 1 online linux2 ora. drivers. ACFs 1 online linux2 ora. evmd 1 online linux2 ora. gipcd 1 online linux2 ora. gpnpd 1 online linux2 ora. mdnsd 1 online linux2 Grid-related faul

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

disk. Split-brain has obvious harm to clusters. Cluster software vendors must provide solutions to solve this problem. Oracle cluster software (grid infrastructure in 11g) uses a quorum device ), it is called voting disk to determine the members in the cluster. All nodes in the cluster share a voting disk. When a node cannot send heartbeat to the internal network or voting disk, It is evicted from the clus

/oracle/product/11.1.0/db_1/network/admin/listener. ora. cdfy740a# Generated by Oracle configuration tools. LISTENER_CDFY740A =(DESCRIPTION_LIST =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP) (HOST = vip1) (PORT = 1521 ))(ADDRESS = (PROTOCOL = TCP) (HOST = 10.107.64.1) (PORT = 1521) (IP = FIRST ))(ADDRESS = (PROTOCOL = TCP) (HOST = 10.107.64.3) (PORT = 1521) (IP = FIRST )))) In the Listener Configuration File,

in OCR. -- View the current configuration: [Grid @ Rac1 ~] $ Srvctl config database-ddave Database unique name: Dave Database Name: Dave Oracle Home:/u01/APP/Oracle/11.2.0/db_1 Oracle user: Oracle Spfile: + Data/Dave/spfiledave. ora Domain: Start options: Open Stop options: immediate Database role: Primary Managemen

Before learning a new thing, you need to understand its purpose. Article This section describes the advantages and disadvantages of Oracle RAC and other four components for future reference. The full text is as follows: To improve performance, we have made a lot of trials on the methods or solutions provided by the Oracl