Does Exadata require RAC?
Exadata is a bunch of smallish machines (8 of them) in the most common configuration. You don’t have to use RAC to use exadata.
What is the difference between Oracle RAC and Exadata?
Oracle Exadata is a pre-configured combination of hardware and software that provides an infrastructure for running Oracle Database. The database layer consists of Sun servers and runs Oracle 11gR2 software and normally Oracle RAC is deployed on database node. The database layer uses ASM to map to the storage layer.
What is an Exadata cluster?
The Exadata Database Machine is a “cloud in a box” composed of database servers, Oracle Exadata Storage Servers, an InfiniBand fabric for storage networking and all the other components required to host an Oracle Database. The Exadata Storage Server is an integral component of the Exadata Database Machine.
What is the difference between Oracle RAC and non RAC?
Oracle RAC allows multiple computers to run Oracle RDBMS software simultaneously while accessing a single database, thus providing clustering. In a non-RAC Oracle database, a single instance accesses a single database. The database consists of a collection of data files, control files, and redo logs located on disk.
Why is Exadata so fast?
The Smart Flash Cache intelligently caches key data to minimize physical I/Os. The second key feature that contributes to the speed of Exadata is the use of an advanced database compression feature called Hybrid Columnar Compression, which lets the database compress data at 10x times the original data.
Is Exadata an operating system?
Exadata Cloud@Customer is an on-premises implementation of Exadata Cloud Service, available since 2017….Oracle Exadata.
|Exadata Database Machine
How can I learn Oracle RAC?
Some things to try out are listed below.
- Create a VM and install the Oracle software.
- Add several virtual hard drives to a VM.
- Configure them to be ASM disks.
- Practice adding and removing disks within ASM.
- Define failure groups.
- Practice backup/recovery using ASM.
- Practice disaster recovery using ASM.
How do I monitor my RAC database?
To monitor the status of all the instances running in a RAC database, PATROL for Oracle uses the SQLPlus utility to identify RAC instances in a cluster. For the list of permissions for the PATROL OS account user, see Permissions for PATROL OS account user on UNIX or Windows to connect to SQLPlus.
How much does Exadata cost?
A full-rack Exadata X-4 machine lists for US$1,100,000, while half-rack configurations cost $625,000, quarter-racks cost $330,000 and eighth-racks cost $220,000, according to Oracle’s latest price list.
What are the advantages of Oracle Exadata?
Exadata increases employee productivity and helps grow revenues with less cost and complexity vs traditional approaches. With performance up to 100 times faster, you can access data more easily, and engage with customers more quickly.