Lifehacks

What is Exadata?

What is Exadata?

Exadata is a database machine designed by Oracle that provides users with optimized functionality pertaining to enterprise class databases and their associated workloads. Exadata is a composite database server machine that uses Oracle database software and the hardware server equipment developed by Sun Microsystems.

When was exadata introduced?

October 2008
Oracle Exadata/Initial release dates

What are the components of Exadata?

The major components of an Exadata Cloud Service include:

  • Database Servers.
  • Storage Servers.
  • InfiniBand.
  • Networks.
  • Oracle Management Console.

What is the use of Oracle Exadata?

Oracle Exadata allows customers to run Oracle Database with the same high performance, scale, and availability wherever needed. Workloads easily move between on-premises data centers, [email protected] deployments, and Oracle Cloud Infrastructure, enabling customers to modernize operations and reduce costs.

How Fast Is Exadata?

Exadata Smart Flash Cache is one of the essential technologies of the Oracle Exadata Database Machine that enables the processing of up to 1.5 million random I/O operations per second (IOPS), and the scanning of data within Exadata storage at up to 75 GB/second.

What is difference between Oracle and Exadata?

With an infrastructure that’s engineered to work together with your Oracle Databases, Oracle Exadata delivers far more power with less hardware. It removes IT complexity while delivering greater performance, scalability, security, and data protection. Exadata is helping to transform our business.

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.

What are the three main Exadata services?

There are mainly three services which run on cell server for the processing which are:

  • CellSRV (Cell Service): This is the primary component of Exadata Cell which provides all Exadata Storage services.
  • MS (Management Server): MS service provides an interface to DBA for communicating or Managing Cell Server.

What is Exadata cell node?

Database Nodes – The Exadata Database Machine runs Oracle Database 11g Real Application Cluster. The cluster and the database run on the servers known as database nodes or compute nodes (or simply “nodes”). The Oracle Exadata Server Software runs in these cells on top of the OS. Disks – each cell has 12 disks.

What is the difference between Oracle RAC and Exadata?

The database layer consists of Sun servers and runs Oracle 11gR2 software and normally Oracle RAC is deployed on database node. The storage layer also consists of Sun Servers and runs Oracle Storage server software. Exadata’s exclusive features are smart scan, Hybrid Columnar Compression, and Storage Indexes.

Why do we need 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.

What do you need to know about Oracle Exadata?

Oracle Exadata Database Machine is a modern architecture featuring scale-out industry-standard database servers, scale-out intelligent storage servers, and an extremely high speed internal RDMA Network Fabric that connects the database and storage servers.

How to patch an Exadata ( Part 1 ) introduction and prerequisites?

The file /tmp/patch_list_dbhome.txt containing (check the README, the patch numbers will change depending on the versions) : [[email protected]]$ $ORACLE_HOME/OPatch/opatch prereq CheckConflictAgainstOHWithDetail -ph ./ Oracle recommends to set this parameter to 8h.

Is it possible to run different versions of Exadata?

It is supported to run different Exadata versions between servers. For example, some storage servers may run 11.2.2.4.2 while others run 11.2.3.1.1, or all storage servers may run 11.2.3.1.1 while database servers run 11.2.2.4.2.

What is Hybrid Columnar Compression in Oracle Exadata?

Oracle Exadata Storage Server provides a very advanced compression capability called Hybrid Columnar Compression. Hybrid Columnar Compression enables the highest levels of data compression and provides tremendous cost savings and performance improvements due to reduced I/O.