DBA Database Administrator

Why Do Organizations Need DBA Expert ? What it’s responsibilities and tasks ?

 

The DBA is responsible for the organization’s databases . From the moment the data enters the databases make sure that they are written quickly, stored persistently, the information is reliable without duplicates and discrepancies that it can be queried quickly and analzed by the various systems and users.

In our world today there are a large number of databases with different technologies. It can be RDBMS – relational database management systems such as Oracle, MySQL, SQL Server and PostgreSQL, NoSQL databases or BigData platforms.

DBA requires high expertise to know and manage these platforms optimally so that the organization’s systems run properly without performance issues, crashes of the data environments and various malfunctions of information loss or database replication issues. This role is today called dataops.

The DBA in the organization is responsible for the data platforms to function properly, that they have high availability and that the databases will continue to function even when there is a fault in one of the servers or the main data center has crashed. The DBA should also take care of backing up the various databases and if necessary recover the information due to infrastructure failure ,application bug or human error.

Beyond the infrastructure side that should be with the best performance the DBA should make sure that the content of the data is also stored properly in the database. The DBA is responsible for the schema design to ensure that the schema structure of the database is correct and optimal, that the fields are defined with the correct data types and sizes. Make sure there are indexes on the required fields so that queries will run quickly, create partitions on the large tables and more.

The DBA must regularly make sure that the SQL queries run properly and optimally so that there is no situation where there is even one query that has run for a long time taking resources from the database machine that causes general slowness to the whole system.

Monitor the database servers and verify that they are not consuming high CPU , Memory or disk resources, analyze the cause and solve it .

All RDBMS databases also support stored procedures, functions and triggers that allow you to write code and add logic to the database layer. The DBA is responsible for writing this code or making sure that the various developers write the code efficiently.

Nowadays when more use is made of open source databases, NoSQL and BigData DBA platforms, a significant part of the DBA’s role is to also serve as a Data Engineer and write data pipelines in python to attract information from different sources to process it and write the data optimally to the database The required data (ETL) can be Data lake or Data warehouse.

In the cloud era when many of the databases run in the cloud the DBA must know and master well the popular cloud environments such as Google Cloud and Amazon AWS and all the database related services in order to know how to manage them optimally on both the infrastructure and the application side.

Currently organizations are looking for: DBA Oracle, DBA MySQL, DBA SQL Server

Or DBA that does everything Big Data DBA

An organization that has a large amount of data with a high amount of writing and reading operations per second needs a DBA Expert so that the data environments will run optimally to avoid problems proactively.

Performance problems and production database faults cost a lot of money to the organization .

A DBA expert can save a lot of production faults, reduce the amount of resources and machines by doing database performance tuning ,save development time and devops time working on recurring production issues .

SeaData is here to help

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