7 Important CellCLI Commands for Exadata DBA-优快云博客

本文介绍 Exadata 存储结构及 CellCLI 的基本使用方法，帮助 Exadata DBA 更好地管理和维护 Cell 服务器。文章涵盖从物理磁盘到 Grid 磁盘的映射关系，并列出了一些常用的 CellCLI 命令。

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Reference:

http://www.dbas-oracle.com/2013/05/7-Important-CellCLI-Commands-for-Exadata-DBA.html

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Now you are an Exadata DBA and I suppose you know Exadata basic Components and Features, your next responsibility is to manage cell Servers. This includes checking health of cell server and maintaining them. Exadata has a very good Health Check Tool Called as Exachk, DBA can use it. Oracle introduced a Cell Command Line Interface know as cellCLI for Database Administrator to interact with cell servers.

Before starting CellCLI Exadata DBA commands let's first understand Storage structure of cell Server. All the storage is presented to Cell Servers, Thy are provided to database server but as ASM Disks only. First of all there is a physical disk which is provided to cell server as LUN, Exadata S/W makes Cell disk on top of it. Now each cell disk is divided in to three grid disks data, reco, system_dg. Grid disks are provide to ASM storage for use.

The relation between physical disk, LUN, Cell Disk and Grid disk is given below:

From the above diagram it's clear to work on Exadata Cell level we need to use CellCLI and sometimes Linux commands.

Here, I am listing some most common use of CellCLI command for Exatadata DBA's to manage cell Servers.

1. Check Cell Status: This command is used to check cell status, This command will list all basic information about a cell like Name of cell, Status, status of all services cellsrv, ms and rs etc.

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