Shulou(Shulou.com)05/31 Report--

This article to share with you is about Oracle 11G RAC production environment architecture is what, Xiaobian think quite practical, so share to everyone to learn, I hope you can read this article after some harvest, not much to say, follow Xiaobian to see it.

Building a set of Oracle RAC in the real environment is like a labor class. Before labor, you need to prepare labor tools and have a full understanding of the content of the labor class. Step by step, you need to consider the difficulties that may be encountered in the labor process and master some small skills in the labor process. After labor, you need to check the labor results, so as to improve labor efficiency while ensuring labor quality.

Similarly, a successful RAC implementation requires a full understanding of the overall RAC architecture, a full understanding of the field environment, a standardized approach, and certain skills, and a full understanding of RAC architecture is the foundation and premise.

Building environment

Many people, including the author, used virtual servers to build RAC environments when they first learned to build Oracle RAC. Although they could successfully build a RAC environment, they were quite different from the actual production environment, which was not conducive to mastering RAC architecture. In RAC environments built using virtual machines, storage is largely ignored, which is the biggest difference from the actual environment. This chapter will use three PCs, two as database servers and one as storage servers, to build a RAC environment that is very similar to the production environment to help beginners fully understand RAC architecture.

I. Physical structure of RAC

This section uses a normal PC to simulate a production-like RAC. RAC and Data Guard are interrelated to form a holistic solution with maximum availability (RAC+Data Guard) and security (Data Security). A brief description of the RAC environment structure to be discussed is provided below, and Data Guard, EM are discussed in subsequent chapters.

RAC physical structure diagram

Each component in the diagram and its associated attributes are shown in the following table.

RAC physical structure component description

Below is a description of the main equipment and operating systems that make up RAC in the above table, including servers, storage, and operating systems installed and used.

1. server description

S1 and S2 are cluster node servers, each of which requires 4 network cards to connect to the public network, Private Cloud (two network cards), and storage network, respectively. S3 is a storage server configured with two network cards and multiple disks. The two network cards are connected to the public network and the storage network respectively.

2. Storage system description

S3 in Figure 2-1 is the storage server. Chapter 1 mentions the use of IP SANs as an implementation of shared storage in this book. Use a regular PC as a storage server, install Openfiler software to provide iSCSI services externally, and connect it to public and storage networks. Access to the public network is to allow administrators to easily manage the storage server through the public network, only for administrative use; access to the storage network is to allow the storage server and database server to perform high-speed data exchange.

3. network illustrates

There are three types of networks according to their purpose: Public, Private Cloud, and Storage.

E1 in Figure 2-1 is a public network. It is a network that provides public services through which application servers communicate and exchange data with database servers. In order to ensure the security of enterprise data and protect it from external attacks, enterprises often have their own internal networks, and the internal networks and external networks are isolated from each other. Of course, some enterprises will also manage the intranet in different regions, and the regions are also isolated, so that the scope of the public network is even smaller.

SW1 is a Private Cloud switch for the Cache Fusion mechanism that transfers heartbeat information and RAC between cluster nodes. Each server has two NIC access to the Private Cloud switch to enable Load Balancer and Failover of Private Cloud connections using HAIP technology, a new feature in version 11gR2.

SW2 is a storage network switch used to transfer iSCSI disk data between cluster nodes and storage servers.

Both SW1 and SW2 networks are Private Cloud and do not provide public services. They are only used by cluster node internal connections. Application systems cannot be directly connected to Private Cloud or Storage Network. Both Private Cloud and Storage Network have their own specific functions and do not provide public services. Of course, multiple VLANs can be partitioned on one switch to create separate Private Cloud and Storage Networks, and another switch can be used as a redundant switch.

4. operating system description

Everything in this book is based on Linux platform discussions. Both S1 and S2 are installed with Red Hat Enterprise Linux Server 5.4 x86_64bit operating system. S3 is a storage server that needs to provide iSCSI services using the open source Openfiler system. Openfiler is also an open source product based on the Linux kernel, commonly used to build low-cost IP SAN storage servers.

As you can see from the RAC physical structure diagram and previous discussions, Oracle RAC deployments are characterized by:

RAC Database uses shared storage, to which each server is connected in some way.

S1 and S2 servers are connected to shared storage downward, and provide services upward through public networks using unified interfaces. Internal data communication between servers is completed through high-speed intranet connections.

II. Hardware environment

The hardware used in this book is a common PC, using 3 PCs to build a two-node Oracle 11gR2 RAC environment. Through the whole RAC system from hardware to software to complete by yourself, this can help you understand Oracle RAC architecture more deeply and master various related technologies skillfully. The hardware used in this book is shown in the table below.

▲ Description of hardware used to build RAC environment

III. Software environment

The above is how the architecture of Oracle 11G RAC production environment is, Xiaobian believes that some knowledge points may be seen or used in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.