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JMX STANDS for Java MANAGEMENT Extension. It GIVES information about the java VIRTUAL machine and software running INSIDE JVM.

JMX stands for Java Management Extension. It gives information about the java virtual machine and software running inside JVM.

We can create table by using command:

PRESTO:tutorials> create table mysql.tutorials.sample as

SELECT * from mysql.tutorials.author;

We can create table by using command:

presto:tutorials> create table mysql.tutorials.sample as

select * from mysql.tutorials.author;

MYSQL CONNECTOR is USED to query an EXTERNAL MySQL DATABASE.

MYSQL Connector is used to query an external MySQL database.

There are various FUNCTIONS of Presto that are given below:

Function--->Description

Abs(x):It returns the absolute value of X.

CBRT(x):It returns the cube ROOT of x.

Ceiling(x):It returns the x value rounded up to nearest INTEGER.

Ceil(x):Arial for ceiling(x)

Log2(x):It returns the base 2 LOGARITHM of x.

There are various functions of Presto that are given below:

Function--->Description

Abs(x):It returns the absolute value of X.

Cbrt(x):It returns the cube root of x.

Ceiling(x):It returns the x value rounded up to nearest integer.

Ceil(x):Arial for ceiling(x)

Log2(x):It returns the base 2 logarithm of x.

In Presto, there are VARIOUS data TYPES in Presto.

• Varchar
• Bigint
• DOUBLE
• Decimal
• JSON etc.

In Presto, there are various data types in Presto.

The Config PROPERTIES of Presto are GIVEN below table:

Config Properties----->Description

TASK. info -refresh-max-wait:It reduces coordinator work load.

task.max-worker-threads:It splits the process and assigns to each worker nodes.

distributed-joins-enabled:It is HASHED based distributed joins.

node-scheduler.network-TOPOLOGY:It sets network topology to scheduler.

The Config properties of Presto are given below table:

Config Properties----->Description

task. info -refresh-max-wait:It reduces coordinator work load.

task.max-worker-threads:It splits the process and assigns to each worker nodes.

distributed-joins-enabled:It is Hashed based distributed joins.

node-scheduler.network-topology:It sets network topology to scheduler.

The DEFAULT PORT of PRESTO is 8080.

The default port of Presto is 8080.

Presto VERIFIER is used to TEST Presto against ANOTHER database (such as MYSQL).

Presto verifier is used to test Presto against another database (such as MySQL).

The LOGS FILES of the PRESTO SERVER are GIVEN below:

• Launcher.log
• Server.log
• http-request.log

The logs files of the Presto server are given below:

Presto architecture COMPONENTS are given below:

• Client : Clint submits SQL statements to a coordinator to GET the result.
• Coordinator: It parses the SQL queries.
• CONNECTOR : Storage PLUGIN is called as connectors.
• Worker : It ASSIGNS task to worker nodes.

Presto architecture components are given below:

We should use Presto because of its features:

• It SUPPORTS standard ANSI SQL.
• It is built in JAVA.
• It has CONNECTOR architecture that is Hadoop.
• It runs on MULTIPLE Hadoop distributions.

We should use Presto because of its features:

There are various PRESTO APPLICATIONS:

• FACEBOOK
• Teradata
• Airbnb

There are various Presto applications:

There are FOLLOWING FEATURES of Presto:

• It is SIMPLE to use.
• It PROVIDES pluggable connectors.
• It provides pipelined executions.
• It provides user DEFINE functions.

There are following features of Presto:

Presto is a distributed SQL QUERY engine. It is an open SOURCE SOFTWARE PROJECT to develop a database.

Presto is a distributed SQL query engine. It is an open source software project to develop a database.