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Oracle 11g R1/R2 Real Application Clusters Essentials
Oracle 11g R1/R2 Real Application Clusters Essentials

Oracle 11g R1/R2 Real Application Clusters Essentials: Design, implement, and support complex Oracle 11g RAC environments for real world deployments

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Oracle 11g R1/R2 Real Application Clusters Essentials

Chapter 2. Oracle 11g RAC Architecture

Oracle 11g RAC architecture differs in many respects from single-instance non-RAC Oracle database environments. In this chapter, we will provide you with a blueprint on how to apply best practices for leveraging your investment in Oracle RAC to create a highly available architecture. We will also discuss the various components of an RAC cluster.

Due to the complex nature of an Oracle 11g RAC environment, we will cover the various components that are unique to Oracle 11g RAC environments and constitute the Oracle system architecture. As such, we will provide key coverage of architectural design and implementation guidelines for successfully deploying Oracle 11g Real Application Clusters. We will also provide coverage of the most important new features that will benefit the Oracle RAC database administrator.

To summarize, we will discuss the following topics during the course of this chapter:

  • Hardware and server architecture for Oracle 11g RAC

  • Network...

Oracle 11g RAC architecture


We will begin our discussion of the RAC architecture for Oracle 11g at the macro level from 50,000 feet, with an example three-node Oracle 11g RAC environment as shown in the following diagram:

The preceding diagram illustrates a fully redundant Oracle 11g RAC architecture in terms of hardware, network, storage, and database layout and configurations. Later in the chapter, we will in turn explain each of these key components and how they function within the grand scheme of an Oracle RAC environment. We will also provide you with guidance on how to best choose the right components for your Oracle RAC environment. As you can see, Oracle RAC is a complex mix of system, network, and database technologies. This provides the ability to scale up or out for large mission-critical information systems to support either OLTP (Online Transaction Processing), DSS (Decision Support Systems), and Data Warehouse, or ERP environments such as Oracle 11i/R12 EBS and PeopleSoft or...

Hardware architecture for Oracle 11g RAC


As database professionals, you will be tasked with finding the best hardware solution when implementing a new RAC environment for Oracle 11g. Cost, performance, and support are key factors to take into account when designing the hardware architecture for RAC. Many considerations need to be planned out for the correct hardware selection for a new or future RAC implementation. We advise that you hold meetings not only among the database team but also with the system, network, and storage administration teams to perform the initial planning of your hardware, storage, and network architecture needed for 11g RAC environments. There is no one-size-fits-all approach when it comes to laying the foundation for 11g RAC. Vendors also provide resources for sizing and validated configurations that are supported with all of the layers of the Oracle 11g RAC technology stack. The majority of long-term RAC architectural and design issues are due to a lack of using...

Network architecture for Oracle 11g RAC


The Oracle 11g RAC technology places a lot of responsibility on the network layer within the data center; it requires a high-performing public as well as private network to deliver the optimal rate of scalability, performance, and availability. As the data within an RAC environment must pass across the interconnect network interfaces, you will need to size and tune the network interfaces accordingly or suffer from performance issues within your 11g RAC environments.

The private network and the Oracle 11g RAC interconnect

The interconnect functions as a network device as part of the private network between cluster nodes in an Oracle 11g RAC configuration. Its purpose is to transfer Oracle data between nodes in the cluster, over a high speed network interface, via the Cache Fusion mechanism for RAC. We will review the network hardware details in this section on how best to select and configure the right components for the private network interconnect...

Storage architecture for Oracle 11g RAC


Oracle 11g RAC cluster nodes share the same storage array that contains the 11g RAC database. As such, the sizing and choice of the storage is of critical importance for design and implementation of your RAC configuration. By understanding disk I/O with respect to how RAC uses storage disks, you will be able to optimize your design so that performance is optimized from the ground up, rather than reacting to a poor design, which will be more difficult to resolve later.

RAID configurations for Oracle 11g RAC

Oracle RAC performance and availability is greatly affected by the storage subsystem layer of the entire system architecture. As such, your choice of RAID (Redundant Array of Inexpensive Disks) will determine a great deal of database and application performance, as well as how critical tasks such as backup, recovery, and disaster recovery processes are affected.

RAID combines multiple physical hard disks into a single logical unit by using vendor...

Storage protocols for RAC


As the database architect responsible for designing the environment for Oracle RAC, you should understand that storage layout is one of the most important considerations to make for the best performance and availability factors within the system architecture. If you use the wrong storage protocol for a large RAC ecosystem, then performance issues will occur within your overall data center environment. Therefore, it is critical to have a solid understanding of storage protocols such as Small Computer System Interface (SCSI), Fibre Channel (FC), and Internet Small Computer System Interface (iSCSI) that may impact your Oracle RAC setup and configuration.

You will need to evaluate and implement these as part of your RAC configuration for Oracle 11g. The chapter will discuss the merits and weaknesses of these storage protocols for you to be able to choose the correct configuration for RAC based on your business requirements. There are additional storage protocols that...

Oracle 11g RAC components


In addition to the many hardware, network, and storage components that drive the foundation of Oracle 11g RAC, we have the complex software called Clusterware that lies at the heart of the Oracle RAC architecture. Oracle 11g RAC consists of these physical devices along with the Clusterware and Automatic Storage Management (ASM) software. ASM provides the mechanism for managing storage within RAC environments and uses both a special type of instance called an ASM instance and special disk volume management in the form of ASM disks and ASM diskgroups. Clusterware refers to the Oracle software layer that performs the operational tasks within the Oracle-clustered environment for RAC. In summary, the Clusterware consists of the following components for Oracle 11g RAC:

  • Voting Disk(s)

  • Oracle Clusterware Registry (OCR)

  • Background processes that manage clusterwide operations and provide functionality for Oracle 11g R1 and 11g R2 RAC

In addition to the Oracle 11g Clusterware...

New ASM features and RAC


There are many new features in Oracle 11g RAC that are introduced with ASM enhancements. Many of these involve ASM configuration.

New SYSASM privilege for Oracle 11g R1 ASM

Introduced in Oracle 11g R1, the SYSASM privilege allows you to separate the database operating system credentials from ASM credentials. This can be useful in today's era of auditing controls and compliance to fulfill requirements for Sarbanes Oxley (SOX), as well as to divide storage support between system administrators and DBA staff members.

For Oracle 11g, you should now use the SYSASM privilege instead of the SYSDBA privilege to connect to and administer an ASM instance. Although before Oracle 11g R2, you were still able to manage ASM from SYSDBA, it is not recommended. In the event that you still decide to use the SYSDBA privilege to connect to an ASM instance, Oracle will send a warning to the alert log file because commands that you run using SYSDBA privileges on an ASM instance are supposed...

New Oracle 11g ASM Disk Group compatibility features


With Oracle 11g, there are now two new Disk Group compatibility attributes—compatible.asm and compatible.rdbms. These Disk Group compatibility attributes determine the minimum version of ASM and database instances that can connect to an Oracle 11g ASM Disk Group. By advancing these Disk Group compatibility settings, you can use the new ASM features that are available in the latest release. If you decide to advance these attributes from 10.1 to 11.1, you will enable the following key features that are new to Oracle 11g ASM:

  • Preferred mirror read

  • Variable size extents

  • Fast mirror resync

The software version of ASM determines the default compatibility of newly created Disk Groups. You can override the Disk Group compatibility default setting when you create Disk Groups with the CREATE DISKGROUP SQL statement.

The ALTER DISKGROUP SQL statement can update the compatibility settings for existing Disk Groups.

The compatibility settings for a Disk...

Summary


This chapter has provided you with a comprehensive discussion of 11g RAC architecture, focusing on the following topics:

  • Oracle 11g RAC hardware and system architecture

  • Key new features for Oracle 11g R1 and 11g R2 RAC and ASM

Because understanding the initial design is important for a successful deployment of Oracle 11g RAC, the chapter focused on all aspects of the system architecture that must be accounted for to ensure success. This included an in-depth discussion of hardware server configurations, network design, and RAID configurations, as well as storage protocols for managing the disk I/O subsystem. Based on the constraints of your business operations and performance needs, you can now decide what system configurations will best suit your deployment of Oracle 11g RAC from all of these key perspectives. The chapter then moved on to discuss a summary of RAC components and new features that are important to be aware of while working with 11g R1 and 11g R2 RAC, and with ASM.

The...

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Key benefits

  • Understand sophisticated components that make up your Oracle RAC environment such as the role of High Availability, the RAC architecture required, the RAC installation and upgrade process, and much more!
  • Get hold of new Oracle RAC components such as the new features of Automatic Storage Management (ASM), performance tuning, and troubleshooting.
  • Packed with practical, real-world examples, expert tips and troubleshooting advice on how to administer a complex Oracle 11g RAC environment.
  • Bonus Oracle 11g RAC R2 information included with this book and e-book
  • This book is the updated release of our previous Oracle 11g R1/R2 Real Application Clusters Handbook. If you already own a copy of that Handbook, there is no need to upgrade to this book.

Description

Oracle RAC or Real Application Clusters is a grid computing solution that allows multiple nodes (servers) in a clustered system to mount and open a single database that resides on shared disk storage. Should a single system (node) fail, the database service will still be available on the remaining nodes. Oracle RAC is an integral part of the Oracle database setup. You have one database with multiple users accessing it, in real time. This book will enable DBAs to get their finger on the pulse of the Oracle 11g RAC environment quickly and easily.This book will cover all areas of the Oracle RAC environment and is indispensable if you are an Oracle DBA who is charged with configuring and implementing Oracle11g R1, with bonus R2 information included. This book presents a complete method for the configuration, installation, and design of Oracle 11g RAC, ultimately enabling rapid administration of Oracle 11g RAC environments.This practical handbook documents how to administer a complex Oracle 11g RAC environment. Packed with real world examples, expert tips and troubleshooting advice, the book begins by introducing the concept of Oracle RAC and High Availability. It then dives deep into the world of RAC configuration, installation and design, enabling you to support complex RAC environments for real world deployments. Chapters cover Oracle RAC and High Availability, Oracle 11g RAC Architecture, Oracle 11g RAC Installation, Automatic Storage Management, Troubleshooting, Workload Management and much more. By following the practical examples in this book, you will learn every concept of the RAC environment and how to successfully support complex Oracle 11g R1 and R2 RAC environments for various deployments within real world situations. This book is the updated release of our previous Oracle 11g R1/R2 Real Application Clusters Handbook. If you already own a copy of that Handbook, there is no need to upgrade to this book.

Who is this book for?

If you are an Oracle DBA who wants to administer Real Application Clusters, then this book is for you. Basic understanding of Oracle DBA is required. No experience of Oracle RAC is required.

What you will learn

  • Learn how to administer, implement, and manage Oracle 11g RAC environments for real world deployments
  • Discover the key architectural design and installation techniques required to successfully deploy Oracle 11g RAC
  • Effectively manage the complex 11g Clusterware, using key troubleshooting tips and techniques
  • Successfully implement database creation methods, manage the Oracle RAC database and handle workload in your RAC environment efficiently
  • Appropriately plan your backup and recovery strategy
  • Know when and how to upgrade your Oracle RAC environment effectively
  • Discover how to deploy Oracle 11g RAC with complex standard-off-the-shelf systems like Oracle EBS
  • Understand new key features for Oracle 11g R1/R2 RAC and ASM
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Table of Contents

12 Chapters
High Availability Chevron down icon Chevron up icon
Oracle 11g RAC Architecture Chevron down icon Chevron up icon
Clusterware Installation Chevron down icon Chevron up icon
Automatic Storage Management Chevron down icon Chevron up icon
Managing and Troubleshooting Oracle 11g Clusterware Chevron down icon Chevron up icon
RAC Database Administration and Workload Management Chevron down icon Chevron up icon
Backup and Recovery Chevron down icon Chevron up icon
Performance Tuning Chevron down icon Chevron up icon
Oracle 11g Clusterware Upgrade Chevron down icon Chevron up icon
Real-world Scenarios Chevron down icon Chevron up icon
Enabling RAC for EBS Chevron down icon Chevron up icon
Maximum Availability Chevron down icon Chevron up icon

Customer reviews

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Full star icon Full star icon Full star icon Full star icon Half star icon 4.4
(11 Ratings)
5 star 54.5%
4 star 27.3%
3 star 18.2%
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jpo Jun 21, 2013
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Good step by step presentation on how to install ORACLE rac. Very useful especially if you are new to the Oracle RAC environment.
Amazon Verified review Amazon
Babu Sep 02, 2011
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book guides the reader through detail design and implementation of Oracle RAC with good examples. It can really help for beginners as well as well as DBA's who have knowledge on 10gRAC.It is easy to understand, because it has detailed steps and nice screen shots.
Amazon Verified review Amazon
Wissem Jul 31, 2011
Full star icon Full star icon Full star icon Full star icon Full star icon 5
The authors, Ben Prusinski and Syed Jaffer Hussain , have successfully managed to write an excellent book about RAC 11gR1 and RAC 11gR2, something not really easy to accomplish, and they have clearly demonstrated the differences between both releases.From the concept to the syntax, this book covers what is needed to successfully build a RAC environment. It focuses on concepts, installation, administration, backup and recovery, streams and data guard. If you want to build a highly available environment, this book is for you.The two first chapters clearly focus on the high availability concepts and architecture of a RAC environment. Many DBAs jump directly to the syntax and forget about the concepts and the architecture. Those DBA will face serious problems with each new release of Oracle RAC. I highly recommend to read those 2 first chapters before jumping to the others. If you are a single instance DBA who never managed to install Oracle clusters, these two first chapters are also for you; read them and learn how to design the ley components like networks and storage.Chapters 3 and 4 discuss Oracle Clusterware installation including grid infrastructure and ASM. They help you build the first components of your clusterware.Chapter 5 is about managing and troubleshooting Oracle 11g . After installing the grid infrastructure you will be faced with many background processes. This chapter teaches you the commands to successfully administer your clusterware components as well as troubleshooting any cluster issue.Chapter 6 is about installing the RAC database with many tips and best practices to follow.Chapter 7 deals with back up and recovery of RAC databases. One of the most important task for a HA DBA. Tips and suggestions have been provided in this chapter.After building the RAC environment, every DBA should care about the database performance; chapter 8 covers the most important components to focus on in your day to day monitoring.Chapter 9 covers the upgrade of Oracle 10g R2 Clusterware to Oracle 11g R1 and how to Upgrade to Oracle 11g R2 Clusterware. This is a really important task for any HA DBA.The chapter 10, in my opinion, one of the best chapters of this book, is about real-world examples; the authors shared their extensive experience of practical scenarios and examples.The book ends with a great appendix containing a vast amount of Oracle RAC commands and tips.In summary, the authors have produced a work of great quality and value. I recommend this book to all DBAs working on RAC systems for the following reasons: * Clear explanation of RAC concepts and architecture. * Clear step by step installation of clusterware and RAC databases. * Real-world examples and tips. * Troubleshooting guide for most common performance issues in RAC. * Good summary of the most important RAC commands.
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Nallasivan Apr 27, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Good book to gift
Amazon Verified review Amazon
Surachart Opun Jul 23, 2011
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book has 12 chapters, They write about High availability solutions for Oracle, They also explain Oracle 11g RAC architecture, Step by Step Clusterware Installation and How to use Automatic Storage Management (ASM), manage and troubleshoot Oracle 11g Clusterware, explain about RAC Database Administration, Workload Management, Performance Tuning, Backup and Recovery. However, good chapter what someone need to learn: Oracle 11g Clusterware Upgrade and Real-world with Oracle RAC. They write about Oracle E-Business Suite (EBS) with Oracle RAC also.If you are looking the book about Oracle 11g R1/R2 RAC, This book can help for idea and learning. It is Easy-understand for readers, because they explain samples step by step and have pictures. However, readers should know about basic Oracle Database and Oracle Real Application Clusters, that will help readers more. By the way, What would you like to know about 11g R1/R2 Real Application Clusters? If you look for Oracle 11g Clusterware Upgrading, ASM Management samples, Troubleshooting Oracle RAC. This book can help.
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