I will continue to explain What is the Storage Server in the Oracle Exadata in this article.
Read first article before this article.
The version of Exadata’s Storage Server Software is queried by the following command called imageinfo.
This image version can be upgraded according to database version. The database features may be activated or used according to the image version and the new features of Exadata can be used with new versions. You can check if Exadata Image update is passed or not as follows.
The Exadata Storage server is responsible for providing storage area to the Database machine and databases to be used. However, the Exadata Storage Server is not like any other storage and conventional systems, and has the following features as hardware and software.
- Exadata Storage Server Software
- Oracle Enterprise Linux
- 64 bit Intel based Sun Fire Server
- Optionally, 12 or 8 fixed-sized disks are available in 2 types such as High Performance and High capacity.
- Flash Cache
All software and hardware are preinstalled and preconfigured. when installing exadata, there are pre-configured root, celladmin and cellmonitor users.
Administration of the storage server is done with CellCLI tool and command.
CellCLI is a command line tool for performing administrative tasks on local cells or storage server. The dcli tool is available for global cell management and remote cell management
There are 3 services called Management Server (MS), Restart Server (RS) and CELLSRV besides operating system, Exadata Storage Software in the Storage Server. We can explain them briefly as follows.
CellSRV: Responsible for tasks such as Smart Scan, Disk I / O and IORM.
Management Server: Performs administration and related tasks with CellCLI.
Restart Server: It is responsible for monitoring and restarting CellSRV and MS.
You can connect to the CellCLI tool and execute any command like following.
Commands that can be executed with CellCLI are as follows.