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There are many built in systems within Oracle that we can leverage to achieve high performance. Retrieving and altering data is way faster with the performance tuning available in Oracle.
Oracle supports multiple instances of a database and enables managing them in a single server. It has caging options that lets smart CPU allocation controls on a server for running instances of a database. Caging works with the database resource manager to manage services over multiple instances.
Oracle offers different editions of itself, it benefits the users to purchase editions as per their application requirements.
Standard Edition One: For single-server.
Standard Edition: Provides larger machine support and Oracle Real Application clustering service.
Enterprise Edition: Packed with features like security, performance, scalability, and availability, required for highly-critical applications.
Express Edition: An entry-level edition that is free to download, install, manage, develop and deploy.
Personal Edition: Enterprise edition features except Oracle Real Application Clustering.
They can seamlessly update the edition if their requirements change in the future. If you want to learn and do some hands-on Oracle, you can download and install the express edition database which is absolutely free.
It uses Real Application Clusters to provide a high data availability system.
1. Scaling the database over multiple instances.
2. Load balancing.
3. Data redundancy and availability.
4. Flexible to increase processing capacity.
Oracle DB has inbuilt Recovery Manager RAMN which can recover and restore files in your database during downtimes and outages. It also supports online archived backups and continuous archiving.