Oracle DBA [database administration] and RAC

[real applications clusters]

Oracle DBA involves the designing, enforcing, and maintaining an Oracle

database system.0

Oracle has marked it place at the world’s pioneers in database

administration. Think database, you think Oracle. They are the pioneers in managing database. Oracle has made managing database synonym

with the word cool!

Oracle specialises in the development and marketing of computer hardware systems as

well as enterprise software products, especially its own brands of database

management systems. Oracle is the second-largest software maker by revenue, after

Microsoft! Making a note of this fact could be of great significance, because it opens up

great job possibilities for students and professionals who specialise in the different

products of Oracle. Honing ones skills in one or many disciplines of the products that

Oracle offers would definitely pay dividends. Oracle online training would be the first

step towards that direction.

Oracle is the other word for database. Think database, you

think Oracle. They are the pioneers in managing database.

Oracle has made managing database synonym with the word

cool!

Let’s get an overview:So what exactly is a database? Well, a database is a

structured compilation of data. This data could be text, pictures, programs, or anything that can be stored on a computer in binary form. A relational database stores the data in the form of tables and columns. A table is the category of data like employee, employee id, etc., and the columns are information about the category,

like name or address. There would be almost no company out there that would do without Oracle

database since it is the safest and the best way of managing database. Hence, there is no surprise for the

surge to learn Oracle, especially Oracle online training and Oracle DBA training online for Oracle

certification. Oracle certification carries a great weight to the curriculum vitae of aspiring software

professionals who plan to make an entry in the IT world.

There are some databases that have nominal feature sets and only store data, while there

are others that include programming languages, utilities, and facilities to maintain

enterprise-level applications like ERP and data warehousing. In a nutshell, Oracle is

the #1 database. Oracle has the most advanced feature set. In this day and age

with travel limitations, learning Oracle DBA training online and other Oracle tools

through Oracle online training is the best way to go, and as reiterated above, Oracle

certification surely would bear a lot of weight in any IT aspirants resume.

Oracle Database could be categorized into:

i. Data Warehousing. ii. Database Application

Development. iii. MySQL.

iv. Oracle Database.

Oracle RAC [real application clusters] 

In database computing, Oracle Real Application Clusters (RAC) is an Oracle Database software

created by Oracle Corporation and introduced in 2001 with Oracle9i. This provides the software for clustering and soaring availability in Oracle

database environments. Oracle Corporation includes RAC with the Standard Edition of Oracle Database which is also known as Baby RAC, but this is made as an extra-charge option for the

Enterprise Edition. 

Oracle RAC permits several computers to run Oracle RDBMS software at the same time while

accessing a single database, which provides clustering.

In a non-RAC Oracle database, a single instance accesses one single database. The database

consists of a collection of data files, control files, and redo logs located on disk. An instance encompasses

the collection of Oracle-related memory and operating system processes that work on a

computer system. 

In an Oracle RAC environment, two or more computers, each with an Oracle RDBMS instance, in

tandem gain access to a single database. This allows an application or user to connect to any

computer and have access to a single synchronized set of data.

 The main aspiration of Oracle RAC is to put into

operation a clustered database to provide performance, scalability, and resilience.

 

Oracle RAC is a cluster database with a collective cache architecture that

conquers the boundaries of traditional shared-nothing and shared-disk methods

to offer highly scalable and available database solutions for all business

applications. 

A cluster consists of multiple interconnected computers or servers that

seem as if they are one server to both the end users and applications. Oracle

RAC facilitates cluster Oracle databases. Oracle RAC makes use of Oracle

Clusterware for the infrastructure to connect multiple servers so they operate

as a single system.

Oracle Clusterware is a portable cluster management solution that is incorporated with

Oracle Database. As noted, Oracle Clusterware is also a mandatory component for using Oracle RAC.

In addition, Oracle Clusterware facilitates both single-instance Oracle databases and Oracle RAC databases to employ the Oracle high-availability infrastructure. Oracle Clusterware enables the

creation of a clustered collection of storage to be utilized by any combination of single-instance and

Oracle RAC databases.

Oracle Clusterware is the only clusterware is needed for majority of platforms on which Oracle RAC

functions. Clusterware can also be used from other vendors if the clusterware is authenticated and

certified for Oracle RAC.

The Oracle Database with the Oracle Real Application Clusters (RAC) alternative permits operating a myriad of database instances on

different servers in the cluster alongside a shared set of data files, also known as the database. The

database extends over multiple hardware systems and still looks like a single unified

database to the application. This facilitates the operation of commodity hardware to decrease the total cost of ownership and to bestow a scalable computing environment which supports many of the application workloads. Oracle RAC is Oracle’s

premier shared disk database clustering technology.

Learning Oracle DBA and RAC from the experts can make all the different success and failure.

Training Icon is one of the leaders in Oracle DBA and Oracle RAC

online training.