flume kafka source - Wikitechy

What are the channel types in Flume and Which channel type is faster ?

Editor — Sun, 11 Jul 2021 16:10:38 +0000

Channels in Flume

It stores events; events are delivered to the channel by means of sources operating within the agent.
An event remains in the channel until a sink removes it for further transport.

There are three different built in channels in Flume –

MEMORY Channel – Events are study from the source into memory and passed to the sink.
JDBC Channel – It stores the events in an embedded Derby database.
FILE Channel – It writes the contents to a file on the file system after reading the event from a source. The file is erased only after the contents are successfully delivered to the sink.

MEMORY Channel – It is the fastest channel among the three however has the risk of data loss. The channel that you choose totally depends on the nature of the big data application and the value of each event.

What are the steps in Flume configurations ?

Editor — Sun, 11 Jul 2021 16:00:29 +0000

Steps in Flume configurations

Flume can process streaming data. So if it is begun once, there is no stop or end to the process. Asynchronously it can flows information from source to HDFS by agent.
First of all agent must know person components how they are associated to load information. So configuration is trigger to load the streaming data.
For example consumer key, consumer secret access Token and access Token Secret are key factor to download data.
To configure Flume, we have to modify three files namely, flume-env.sh, flumeconf.properties, and bash.rc.
Setting the Path/Classpath, in the .bashrc file, set the home folder then the path, and the classpath for Flume as given below,

In case you configure the apache flume you have the files are flume-conf.properties.template,flume-env.sh.template,flume-env.ps1.template, and log4j.properties.

What is Interceptor in Apache Flume ?

Editor — Sun, 11 Jul 2021 15:29:39 +0000

Interceptor in Apache Flume

Apache Flume offers interceptors as a method of modifying records as they have a Flume channel.
Interceptors are used to filter the events between source and channel, channel and sink. These channels will filter un-necessary or targeted log files.

Interceptors are a part of Flume’s extensibility model. They permit events to be inspected as they pass between a source and a channel, and also the developer is liberated to modify or drop events as needed. Interceptors in the chain along to create a pipeline process.