Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Rename the completed spool file to spool-1 as specified in the earlier example."

A block of code is set as follows:

agent.sources = spool-source
agent.sources.spool-source.type=spooldir
agent.sources.spool-source.spoolDir=/home/centos/flume-data
agent.sources.spool-source.interceptors=ts uuid

Any command-line input or output is written as follows:

${FLUME_HOME}/bin/flume-ng agent --conf ${FLUME_HOME}/conf/  -f ${FLUME_HOME}/conf/spool-fileChannel-kafka-flume-conf.properties  -n agent -Dflume.root.logger=INFO,console

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: " Without minimum or no delay (NRT: Near Real Time or Real time) the company wanted the data produced to be moved to Hadoop system"