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本帖最后由 tacsoft 于 2011-07-21 12:30 編輯
首先告訴你為什么我要花時(shí)間幫你查Oracle文檔，就是防止有人沒(méi)有根據(jù)的誤導(dǎo)你。下面內(nèi)容是Oracle的建議：
本文內(nèi)容來(lái)自：
Oracle; Database 2 Day + Real Application Clusters Guide
11g Release 2 (11.2)
硬件需求（About Hardware Requirements）
你集群的每個(gè)節(jié)點(diǎn)，或者Oracle集群軟件和Oracle RAC 安裝，硬件必須滿足軟件的最低要求。這些硬件要求可以歸納如下：
（Each node you make part of your cluster, or Oracle Clusterware and Oracle RAC installation, must satisfy the minimum hardware requirements of the software. These hardware requirements can be categorized as follows:）
•物理內(nèi)存（至少1.5 gigabyte (GB) RAM）
（Physical memory (at least 1.5 gigabyte (GB) of RAM)）
•SWAP空間等于RAM
（An amount of swap space equal to the amount of RAM）
•在每個(gè)/tmp下，臨時(shí)空間（至少1GB）
（Temporary space (at least 1 GB) available in /tmp）
•安裝的Oracle軟件版本有一個(gè)認(rèn)證的處理器類型（CPU）
（A processor type (CPU) that is certified with the release of the Oracle software being installed）
•如果使用OUI（Oracle通用安裝程序），最小分辨率是1024 x 786
（A minimum of 1024 x 786 display resolution, so that Oracle Universal Installer (OUI) displays correctly）
•在集群中使用的所有服務(wù)器必須具有相同的芯片架構(gòu)，所有為 32-bit 處理器或者64-bit 處理器。
（All servers that are used in the cluster must have the same chip architecture, for example, all 32-bit processors or all 64-bit processors）
•在軟件的安裝位置有足夠的磁盤空間來(lái)存儲(chǔ)Oracle軟件。
（Adequate disk space in the software installation locations to store the Oracle software）
你至少要有5.5 GB可用磁盤空間用于Grid home目錄，其中既包括Oracle Clusterware和Oracle自動(dòng)存儲(chǔ)管理（Oracle ASM的）及其關(guān)聯(lián)的日志文件為二進(jìn)制文件，至少有4 GB可用磁盤空間用于Oracle Database home目錄，或者Oracle home目錄。
（You need at least 5.5 GB of available disk space for the Grid home directory, which includes both the binary files for Oracle Clusterware and Oracle Automatic Storage Management (Oracle ASM) and their associated log files, and at least 4 GB of available disk space for the Oracle Database home directory, or Oracle home directory.）
關(guān)于共享存儲(chǔ)
Oracle RAC數(shù)據(jù)庫(kù)被每個(gè)數(shù)據(jù)庫(kù)共享。Oracle RAC 數(shù)據(jù)庫(kù)使用的所有的數(shù)據(jù)文件、控制文件、重做日志文件和服務(wù)器參數(shù)文件（SPFILE）必須存儲(chǔ)在Oracle RAC數(shù)據(jù)庫(kù)實(shí)例可訪問(wèn)的共享存儲(chǔ)設(shè)備上。本指南中指出的Oracle RAC安裝使用Oracle ASM作為的共享存儲(chǔ)設(shè)備，存儲(chǔ)Oracle Clusterware和Oracle數(shù)據(jù)庫(kù)文件。
（An Oracle RAC database is a shared everything database. All data files, control files, redo log files, and the server parameter file (SPFILE) used by the Oracle RAC database must reside on shared storage that is accessible by all the Oracle RAC database instances. The Oracle RAC installation demonstrated in this guide uses Oracle ASM for the shared storage for Oracle Clusterware and Oracle Database files.）
Oracle集群實(shí)現(xiàn)很好的可擴(kuò)展性和高可用性，使用下列組件：
（Oracle Clusterware achieves superior scalability and high availability by using the following components:）
表決（Voting disk）磁盤管理群集成員，協(xié)調(diào)發(fā)生網(wǎng)絡(luò)故障時(shí)節(jié)點(diǎn)之間的關(guān)系。表決磁盤文件駐留在共享存儲(chǔ)器上。對(duì)于高可用性，Oracle建議你使用多個(gè)表決磁盤，你的表決磁盤數(shù)應(yīng)為奇數(shù)。如果你只定義了一個(gè)表決磁盤，請(qǐng)使用文件系統(tǒng)級(jí)別的鏡像。
（Voting disk–Manages cluster membership and arbitrates cluster ownership between the nodes in case of network failures. The voting disk is a file that resides on shared storage. For high availability, Oracle recommends that you have multiple voting disks, and that you have an odd number of voting disks. If you define a single voting disk, then use mirroring at the file system level for redundancy.）
Oracle群集注冊(cè)表（Oracle Cluster Registry (OCR)）--維護(hù)集群配置信息和集群內(nèi)集群數(shù)據(jù)庫(kù)的配置信息。OCR包含下面內(nèi)容，數(shù)據(jù)庫(kù)上運(yùn)行的節(jié)點(diǎn)，數(shù)據(jù)庫(kù)上的服務(wù)，OCR的存儲(chǔ)過(guò)程，Oracle集群控制的信息。OCR駐留在所有節(jié)點(diǎn)可以訪問(wèn)的共享存儲(chǔ)設(shè)備上。Oracle集群可以服用，或者維護(hù)多個(gè)OCR副本，Oracle建議你使用此特性，以確保高可用性。
（Oracle Cluster Registry (OCR)–Maintains cluster configuration information and configuration information about any cluster database within the cluster. The OCR contains information such as which database instances run on which nodes and which services run on which databases. The OCR also stores information about processes that Oracle Clusterware controls. The OCR resides on shared storage that is accessible by all the nodes in your cluster. Oracle Clusterware can multiplex, or maintain multiple copies of, the OCR and Oracle recommends that you use this feature to ensure high availability.）
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注：
如果你不選擇Oracle ASM存儲(chǔ)你的Oracle集群文件，在你安裝Oracle集群軟件到Grid home之前，VOTE和OCR必須駐留在一個(gè)配置好的集群文件系統(tǒng)上。
（If you choose not to use Oracle ASM for storing your Oracle Clusterware files, then both the voting disks and the OCR must reside on a cluster file system that you configure before you install Oracle Clusterware in the Grid home.）
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這些Oracle集群組件需要一個(gè)共享文件系統(tǒng)，磁盤空間需求如下：
（These Oracle Clusterware components require the following disk space on a shared file system:）
•Oracle Clusterware Registry (OCR)，每個(gè)300MB，或者總的磁盤空間900MB
（Three Oracle Clusterware Registry (OCR) files, 300 MB each, or 900 MB total disk space）
•3個(gè)VOTE磁盤文件，每個(gè)300MB，或者總的磁盤空間900MB
（Three voting disk files, 300 MB each, or 900 MB total disk space） |
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發(fā)表于 2011-07-19 15:49
