oracle rac architecture

Tags: Oracle Tutorials Oracle Training Oracle Database Tutorials Oracle Engineers training Oracle Database Training Course Objectives Wind This course explains the Oracle RAC clus

there is no delay. The Oracle 10g RAC defaults to the broadcast algorithm, which you can see from the Alert.log log:Picked broadcast on commit scheme to generate SCNSRedolog Checkpoint and SCN relationshipsHttp://blog.csdn.net/tianlesoftware/archive/2010/01/25/5251916.aspx2.5 Cache Fusion, GCS, GES relationshipCache fusion (Memory fusion) is a data block transfer between instances through a high-speed priv

there is a delay between the nodes, the broadcast although the load, but there is no delay. The Oracle 10g RAC defaults to the broadcast algorithm, which you can see from the Alert.log log:Picked broadcast on commit scheme to generate SCNSRedolog Checkpoint and SCN relationshipsHttp://blog.csdn.net/tianlesoftware/archive/2010/01/25/5251916.aspx2.5 Cache Fusion, GCS, GES relationshipCache fusion (Memory fus

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

Tags: HTTP://BLOG.ITPUB.NET/22664653/VIEWSPACE-722463/: The log system in an Oracle RAC environment is more complex than a single system: see: A brief introduction to the log architecture in the Oracle cluster environment, In the case of problems, you can quickly find the required log files, timely location problems ~

4096dec1101:02racgdrwxr-x---2gridoinstall4096dec 1101:02srvmdrwxrwxr-x2gridoinstall4096dec1101:02 xag[[emailprotected]rac1]$However, in the 12c, there is still the above directory structure, but there is nothing in the content. Since 12c, the log structure of the RAC has changed.There are two types of RAC in 12c:1. Standard ClusterName of Alert Log:alert.logLocation of alert log: $

The first is several terms that need to be understood: a cluster refers to the physical connection of multiple computers. RAC is short for Oracle Real Application cluster. Official Chinese documents are generally translated as "real application cluster". It generally consists of two or more homogeneous computers and shared storage devices, powerful processing capabilities! Why do we need

Execute the following configuration process on all nodes in the cluster! Oracle 9.0.1 and 9.2.0.1 use a user space named watchdogd to monitor the background program to monitor the cluster status and restart the RAC node when a fault occurs. Starting from Oracle 9.2.0.2, this monitoring background program has been replaced by the hangcheck-timer module, which can

/orcl/orcl2/trace/orcl2_ora_15431.trc 2 Active problem Count 0 2 Active Incident Count 0 11 rows have been selected. Cdump: This directory contains core dumpsTrace: This directory dumps database alarm logs and trace files for foreground and background database processes.Alert: This directory stores XML alarm logs.HM: This directory stores health check output files.Incident: This directory stores the incident directory generated by a critical error, and each incident directory is named

How RAC Works and related components (iii) 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 revie

the production database in peacetime.3 MAAMAA (Maximum availability Architecture) is not an independent third, but a combination of the previous two, to provide the highest availability. RAC clusters are deployed in each room, and data guard is used to synchronize between multiple rooms.RAC OverviewA shared storage file system (NFS), or even a clustered file system (such as OCFS2), is primarily used for st

RAC is an implementation of real application cluster to improve high availability through cluster. RAC can provide high-performance and low-cost solutions. RAC is based on a shared storage mechanism. Unlike Oracle database instances of a single instance, RAC provides multipl

Label:RAC pre-Installation for NFS on Linux (vi) 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 docum

, 2015 11:18:36 Database installationFollowing the Oracle cluster installation, the next and most important database installation, the entire database installation is not very difficult, the user logged in as an Oracle User RAC1 master node, the extracted files installed. After the main node is installed, all other nodes are installed automatically, the principle mechanism is SSH communication mechan

Why didn't Oracle RAC Opatch go to Rac database home during auto? First explain the environment:Operating System: AIX 7.1Oracle version: Oracle Rac 11.2.0.3I used the 11.2.0.3.9 patch set before and it was not officially used for Rac