This post is the fourth video of a multi-part video series on “Oracle Exadata Cloud Service for DBAs & APPS DBAs“.
In this post, we will be covering the high-levelExadata Cloud Service (ExaCS) Offerings which are Quarter Rack, Half Rack, and Full Rack shapes of Exadata and X6, X7 models of Exadata.
Note: If you have missed my previous post on Oracle Exadata Cloud Service(ExaCS) Architecture, to check previous post click here https://k21academy.com/clouddba64
Note: If you want to know more about the Roles & Tasks of DBA’s in Cloud, check the previous post on https://k21academy.com/clouddba12
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Shape Of Exadata Cloud Service
The hardware of the Exadata that the client chooses refers to the shape of ExaCS. Oracle ExaCS is available in four shapes:
- Quarter Rack
- Half Rack
- Full Rack
Oracle Exadata Quarter rack consists of 2 database servers and 3 storage servers. It contains up to 92 CPUs in all the database servers combined with RAM up to 1440 GB. The flash raw storage and usable disk storage are up to 76.8 TB and 106.9 TB respectively.
Note: The configuration of CPUs, memory, and storage depends on the model i.e X6 and X7.
Oracle Exadata Half Rack consists of 4 database servers and 6 storage servers. It contains up to 184 CPUs with RAM up to 2880 GB. The flash raw storage and usable disk storage are up to 153.6 TB and 213.8 TB respectively.
Oracle Exadata Full Rack consists of 8 database servers and 12 storage servers. It contains up to 368 CPUs with RAM up to 1440 GB. The flash raw storage and usable disk storage are up to 307.2 TB and 427.6 TB respectively.
The newly launched Oracle Exadata Base is similar to Quarter Rack configuration as it contains 2 database servers and 3 storage servers. However, there is less number of CPUs available. The Base can contain up to 48 CPUs and has a lower configuration of memory and storage as compared to Quarter Rack. (Consider it equivalent to 1/8th of a Full Rack)
Note: One cannot switch from one shape to another, directly. Although migration options such as Data Guard and Backup & Restore can be used to switch the shape of the Exadata.
Models of Exadata
There are three most common hardware machines or models of Oracle ExaCS:
For Exadata On-Cloud, Exadata X6 machine is available for all configurations with the following specifications:
X7 is the latest version of Exadata available for Exadata Cloud. It offers much higher memory and storage capacity in comparison to X6.
X8 is the latest version of Exadata available for Exadata Cloud. X8 uses machine learning to tune Oracle Autonomous Database and automate indexing, it has 60% better performance than the previous machines.
- [First video] Oracle Exadata Cloud Service (ExaCS): Overview for Beginners
- [Second video] Oracle Exadata Cloud Service(ExaCS) Architecture
- [Third video] Exadata Deployment Options: Cloud Service (ExaCS) vs Cloud at Customer (ExaCC) vs Exadata Machine
- [Fifth video] Oracle Exadata Cloud Service(ExaCS) Storage Options
- [Sixth Video] Oracle Exadata Cloud Service (ExaCS) Networking
- Database Deployment Option in Oracle cloud
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