在本文中将介绍在oracle11gr2rac环境下使用gridinfrastructure来管理ogg服务，在开始之前，请先按照前文的步骤配置好rac（source）同单实例(target)数据库之间的
在本文中将介绍在oracle 11g r2 rac环境下使用grid infrastructure来管理ogg服务，在开始之前，请先按照前文的步骤配置好rac（source）同单实例(target)数据库之间的ogg单向同步，同时确保rac数据库各项服务运行正常,同时启动target端的数据库实例和ogg的mgr，replicat进程，美国服务器，source端ogg的mgr，extract，extract dump进程可以关闭！
一：查看rac各服务是否online，这里3个gsd服务offline属于正常情况！
二：在source端添加VIP，并赋权限,检查vip是否能正常启动，网站空间，在本例中运行grid infrastructure的操作系统用户为grid，香港服务器，运行ogg的操作系统用户为oracle
三：配置action脚本，该脚本必须包含start,stop,check,clean,abort几个函数，才能用于后续的grid infrastructure调用，这里把脚本直接放在acfs文件系统上，以便节点间共享
四：使用oracle用户添加oggapp，并授权给oracle用户管理
五：检查target端的数据库是否可以正常连接，ogg进程是否运行正常
六：检查source端的数据库是否可以正常连接，ogg进程未启动
七：使用oracle用户启动oggapp resource,检查source(rac1)上的ogg进程是否成功启动
八：测试failover
九：排错与停止oggapp服务，view report testpump查看日志报错如下
2012-07-18 21:05:59 ERROR OGG-01031 There is a problem in network communication, a remote file problem, encryption keys for target and source do not match (if using ENCRYPT) or an unknown error.(Reply received is Unable to open file "/vol2/ogg/dirdat/rt000001" (error 11, Resource temporarily unavailable)).
2012-07-18 21:05:59 ERROR OGG-01668 PROCESS ABENDING.
GGSCI (rac2.yang.com) 15> alter extract testpump etrollover
2012-07-18 21:20:40 INFO OGG-01520 Rollover performed. For each affected output trail of Version 10 or higher format, after starting the source extract, issue ALTER EXTSEQNO for that trail's reader (either pump EXTRACT or REPLICAT) to move the reader's scan to the new trail file; it will not happen automatically.
EXTRACT altered.
GGSCI (rac2.yang.com) 18> info all
Program Status Group Lag at Chkpt Time Since Chkpt
MANAGER RUNNING
EXTRACT RUNNING TESTEXT 00:00:00 00:00:00
EXTRACT RUNNING TESTPUMP 00:00:00 00:00:10
[oracle@rac2 ogg]$ crsctl stop resource oggapp
CRS-2673: Attempting to stop 'oggapp' on 'rac2'
CRS-2677: Stop of 'oggapp' on 'rac2' succeeded
[oracle@rac2 ogg]$ crsctl status resource oggapp
NAME=oggapp
TYPE=cluster_resource
TARGET=OFFLINE
STATE=OFFLINE
如果停止使用grid infrastructure来管理ogg进程，只需要使用crsctl命令删除oggapp和oggvip服务即可！需要值得注意的是，如果使用grid infrastructure来管理ogg，则mgr进程的参数文件中必须要配置autostart和autorestart选项！参考文档：(感谢作者分享)
本文出自 “斩月” 博客，谢绝转载！
How does MySQL index cardinality affect query performance?Apr 14, 2025 am 12:18 AMMySQL index cardinality has a significant impact on query performance: 1. High cardinality index can more effectively narrow the data range and improve query efficiency; 2. Low cardinality index may lead to full table scanning and reduce query performance; 3. In joint index, high cardinality sequences should be placed in front to optimize query.
MySQL: Resources and Tutorials for New UsersApr 14, 2025 am 12:16 AMThe MySQL learning path includes basic knowledge, core concepts, usage examples, and optimization techniques. 1) Understand basic concepts such as tables, rows, columns, and SQL queries. 2) Learn the definition, working principles and advantages of MySQL. 3) Master basic CRUD operations and advanced usage, such as indexes and stored procedures. 4) Familiar with common error debugging and performance optimization suggestions, such as rational use of indexes and optimization queries. Through these steps, you will have a full grasp of the use and optimization of MySQL.
Real-World MySQL: Examples and Use CasesApr 14, 2025 am 12:15 AMMySQL's real-world applications include basic database design and complex query optimization. 1) Basic usage: used to store and manage user data, such as inserting, querying, updating and deleting user information. 2) Advanced usage: Handle complex business logic, such as order and inventory management of e-commerce platforms. 3) Performance optimization: Improve performance by rationally using indexes, partition tables and query caches.
SQL Commands in MySQL: Practical ExamplesApr 14, 2025 am 12:09 AMSQL commands in MySQL can be divided into categories such as DDL, DML, DQL, DCL, etc., and are used to create, modify, delete databases and tables, insert, update, delete data, and perform complex query operations. 1. Basic usage includes CREATETABLE creation table, INSERTINTO insert data, and SELECT query data. 2. Advanced usage involves JOIN for table joins, subqueries and GROUPBY for data aggregation. 3. Common errors such as syntax errors, data type mismatch and permission problems can be debugged through syntax checking, data type conversion and permission management. 4. Performance optimization suggestions include using indexes, avoiding full table scanning, optimizing JOIN operations and using transactions to ensure data consistency.
How does InnoDB handle ACID compliance?Apr 14, 2025 am 12:03 AMInnoDB achieves atomicity through undolog, consistency and isolation through locking mechanism and MVCC, and persistence through redolog. 1) Atomicity: Use undolog to record the original data to ensure that the transaction can be rolled back. 2) Consistency: Ensure the data consistency through row-level locking and MVCC. 3) Isolation: Supports multiple isolation levels, and REPEATABLEREAD is used by default. 4) Persistence: Use redolog to record modifications to ensure that data is saved for a long time.
MySQL's Place: Databases and ProgrammingApr 13, 2025 am 12:18 AMMySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen
MySQL: From Small Businesses to Large EnterprisesApr 13, 2025 am 12:17 AMMySQL is suitable for small and large enterprises. 1) Small businesses can use MySQL for basic data management, such as storing customer information. 2) Large enterprises can use MySQL to process massive data and complex business logic to optimize query performance and transaction processing.
What are phantom reads and how does InnoDB prevent them (Next-Key Locking)?Apr 13, 2025 am 12:16 AMInnoDB effectively prevents phantom reading through Next-KeyLocking mechanism. 1) Next-KeyLocking combines row lock and gap lock to lock records and their gaps to prevent new records from being inserted. 2) In practical applications, by optimizing query and adjusting isolation levels, lock competition can be reduced and concurrency performance can be improved.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Dreamweaver Mac version
Visual web development tools
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
WebStorm Mac version
Useful JavaScript development tools
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
