Skip to main content

Introduction to Database & Database Administrator roles

Database:
A database is an organized collection of data, generally stored and accessed electronically from a computer system. 
Where databases are more complex they are often developed using formal design and modeling techniques.

The database management system (DBMS) is the software that interacts with end users, applications, 
and the database itself to capture and analyze the data. The DBMS software additionally encompasses 
the core facilities provided to administer the database. The sum total of the database, the DBMS and 
the associated applications can be referred to as a "database system". Often the term "database" 
is also used to loosely refer to any of the DBMS, the database system or an application associated with the database.

Database Admin:

 A database administrator (DBA) is a specialized computer systems administrator who maintains a successful database environment
by directing or performing all related activities to keep the data secure. The top responsibility of a DBA professional is to maintain data integrity.
This means the DBA will ensure that data is secure from unauthorized access but is available to users.

A database administrator will often have a working knowledge and experience with a wide range of database management products such as MySQL,MongoDB,PpostgreSQl and SQL Server.

Responsibilities Of Database Administrator

Starting, Stopping and Configuring MySQL
Security-Related Configuration
MySQL Database Creation
Using Client Programs for MySQL DBA Work
Setting up Character Set Support
Locking
Using Storage Engines, including the MyISAM and InnoDB engines
Table Maintenance
Obtaining Data from the Information_Schema Database
Backup and Recovery, including Exporting (mysqldump) and Importing (mysqlimport
Using Stored Procedures and Triggers for Database Administration Tasks
User Management
Securing the Server
Upgrade-Related Security Issues
Optimizing Queries
Optimizing Schemas
Optimizing the Server
The Event Scheduler
Partitioned Tables
Interpreting Error Messages
Optimizing the MySQL Environment
Scaling MySQL, including Replication

Comments

Post a Comment

Popular posts from this blog

About MySQL - Database history Support and Versioning

About MySQL: MySQL was created by a Swedish company. David Axmark (left) and Michael "Monty" Widenius,  MySQL AB, founded by David Axmark, Allan Larsson and Michael "Monty" Widenius. Original development of MySQL by Widenius and Axmark began in 1994. The first version of MySQL appeared on 23 May 1995. It was initially created for personal usage from mSQL based on the low-level language ISAM, which the creators considered too slow and inflexible. They created a new SQL interface, while keeping the same API as mSQL. By keeping the API consistent with the mSQL system, many developers were able to use MySQL instead of the (proprietarily licensed) mSQL antecedent. Support: The MySQL server software itself and the client libraries use dual-licensing distribution. They are offered under GPL version 2, or a proprietary license. MySQL AB owns the copyright to the MySQL source code. This means that MySQL AB can distribute MySQL under several different l...
Post a Comment
Read more

MySQL thread error code of 1032- Translate binlog completely to avoid error

Could not execute Update_rows event on table db.table; Can't find record in 'table', Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND; the event's   master log mysql-bin.262297, end_log_pos 1983208 As of my knowledge the causing stop of slave SQL thread error code of 1032, due to lack of sync between Master - Slave. In our case, slave got an Update event form master, but that particular record was not available in the slave. (Of course, that was deleted on Master n Slave separately) You would get this error only if the binlog_format is set to ROW_BASED or MIXED mode. So, now check that particular binlog at that position where replication stopped with this error. When you convert the binlog with mysqlbinlog command, you may see some junk characters   where you were expecting some DMLs which caused the error(In our case its an Update statement). So you can use below command to translate binlog completely: mysqlbinlog --base64-output=DECO...
Post a Comment
Read more

MySQL Architecture -Client Server Architecture

Client/Server Overview The MySQL database system operates using a client/server architecture. The server is a central program that manages database contents, and client programs connect to the server to retrieve or modify the data. MySQL also includes non-client utility programs and scripts. MySQL Server:   This is the mysqld program that manages database and tables. Most users choose binary MySQL distribution that includes a server ready to run with the capabilities they need, but it's also possible to compile MySQL from source. Client Programs:  These are programs that communicate with the server by sending requests to it over a network connection. The server acts on each request and returns a response to the client. For example you can use the mysql client to send queries to the server, and the server returns the query results. A client program can connect locally to a server running on the same machine or remotely to a server running on a different mac...
Post a Comment
Read more