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Data
1. About me
• MySQL DBA at www.163.com (October 2010 –
August 2012)
– Managing 100+ MySQL hosts,300+ MySQL instances
– Design Schema
– Database Architecture and Design
– Performance Tuning
2. What is database administrator?
• Installing and upgrading the database server and application tools
• Allocating system storage and planning future storage requirements for
the database system
• Enrolling users and maintaining system security
• Controlling and monitoring user access to the database
• Monitoring and optimizing the performance of the database
• Planning for backup and recovery of database information
• Backing up and restoring the database
• Generating Various reports by querying from database as per need
3. History
• Database concept
– The database concept has evolved since the 1960s to ease increasing difficulties in designing, building, and
maintaining complex information systems (typically with many concurrent end-users, and with a large
amount of diverse data). It has evolved together with database management systems which enable the
effective handling of databases. Though the terms database and DBMS define different entities, they are
inseparable: a database's properties are determined by its supporting DBMS. With the progress in
technology in the areas of processors, computer memory, computer storage and computer networks, the
sizes, capabilities, and performance of databases and their respective DBMSs have grown in orders of
magnitudes. For decades it has been unlikely that a complex information system can be built effectively
without a proper database supported by a DBMS. The utilization of databases is now spread to such a wide
degree that virtually every technology and product relies on databases and DBMSs for its development and
commercialization, or even may have such embedded in it. Also, organizations and companies, from small to
large, heavily depend on databases for their operations.
– No widely accepted exact definition exists for DBMS. However, a system needs to provide considerable
functionality to qualify as a DBMS. Accordingly its supported data collection needs to meet respective
usability requirements (broadly defined by the requirements below) to qualify as a database. Thus, a
database and its supporting DBMS are defined here by a set of general requirements listed below. Virtually
all existing mature DBMS products meet these requirements to a great extent, while less mature either
meet them or converge to meet them.
5. What is RDBMS?
A short definition of an RDBMS is: a DBMS in which
data is stored in tables and the relationships among
the data are also stored in tables. The data can be
accessed or reassembled in many different ways
without having to change the table forms.
11. What is NoSQL?
In computing, NoSQL (mostly interpreted as "not
only SQL") is a broad class of database management
systems identified by its non-adherence to the
widely used relational database management
system model, that is NoSQL databases are not
primarily built on tables, and as a result, generally
do not use SQL for data manipulation.
12. NoSQL Software
– Oracle Berkeley DB
– Redis
– MongoDB
– Hbase
– MySQL handlesocket
– Cassandra
22. SQL(Structured Query Language)
• Data Query Language(DQL)
– SELECT
• Data Definition Language(DDL）
– CREATE DROP ALTER
• Data Manipulation Language(DML）
– INSERT UPDATE DELETE
23. SQL(Structured Query Language)
• Data Query Language(DQL)
– SELECT
• Data Definition Language(DDL）
– CREATE DROP ALTER
• Data Manipulation Language(DML）
– INSERT UPDATE DELETE
• Data Controlling Language（DCL）
– GRANT REVOKE COMMIT ROLLBACK
