exalytics

Exalytics的虚拟化

Exalytics虚拟化的前提条件
 Exalytics机器已经被固定并安装在一个数据中心。
 Oracle ILOM 被配置为可从网络中使用web 界面。
 所有的网络信息,如主机名、 IP 地址、 子网、 网关和 DNS 都是可用的。
 空闲、 未分配的 IP 地址可用于服务器池中每个 Exalytics 机器上部署的虚拟机。
 有一个Linux 环境可用来安装 Oracle VM Manager。
 有一个数据库服务器是可用来安装 Oracle VM Manger。 有一台计算机可以访问互联网(不一定是Exalytics机器),下载所需的软件。
 重新配置现有的RAID。以Exalytics X2-4为例,六块硬盘,每块硬600GB,两块硬盘配置成RAID1;四块硬盘配置成RAID5, 同时需要把RAID1分成两个虚拟盘,其中100GB用于boot分区, 另外457GB用于操作系统,日志和临时空间, 其他的RAID5的硬盘空间用于软件的安装和TimesTen的数据文件。

虚拟机的安装
1. 安装和配置OVM Server
Oracle VM Server是托管虚拟化环境,为运行中的虚拟机提供一个安全的、 基于服务器的平台。创建一个虚拟机之前必须首先在 Exalytics 机器上安装 Oracle VM Server。

2. 安装和配置OVM Manager
Oracle 建议在其它单独的机器上安装 Oracle VM Manager。

2.1将 Oracle VM Server添加到Oracle VM Manager环境被称为发现Oracle VM Server。发现服务器是配置虚拟化环境的第一步。

2.2创建虚拟的网络接口控制器 (VNIC) 。通过定义一个范围的 MAC 地址用于每个 VNIC,创建虚拟网络接口。每个被虚拟机使用的 MAC 地址对应单一虚拟网络接口控制器 (NIC)

3. 创建服务器池。 服务器池由至少一个 Oracle VM Server组成。如果你发现服务器池并没有足够的资源,如 CPU 或内存运行虚拟机,可以通过添加更多的 Oracle VM Server扩展服务器池。

4. 创建一个 Exalytics资料库。 资料库存储 Oracle VM 资源,如虚拟机、创建虚拟机的模板、 虚拟机的程序集等等。使用 Oracle VM Manager来创建和配置 Exalytics 资料库。

注︰ Oracle 建议在每个可用的物理磁盘上创建资料库。使用较小的资料库来存储 Oracle VM 模板、 克隆的虚拟机,更大的资料库分配到虚拟机的虚拟磁盘。

5. 使用VM模板创建虚拟机。从模板创建虚拟机的过程称为克隆。创建虚拟机之前,请确保以下资源是可用的︰ 服务器池, Oracle VM Server和 VM 模板

6. 维护虚拟机
• 在Oracle VM Manager中维护虚拟机,比如启动/关闭等
• 在Oracle VM Manager中为虚拟机配置网络连接

图A显示了Oracle VM包含的各个组件


 
                 图A Oracle VM 组件关系图

在虚拟机上安装Exalytics软件
1. 安装软件必须满足两个前提条件:
已经创建好虚拟机, 如果要安装Essbase,需要创建好两个虚拟机
在RAID5上已经创建了虚拟磁盘并且已经挂载在了虚拟机上

2. 在虚拟机上安装和配置Exalytics软件
用root用户创建一个/u01分区
修改oracle用户分组并对/u01授予相应权限
安装OBIEE和TimesTen等
如果需要部署Essbase, 则需要在另一个单独的虚拟机上进行安装

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