In this book, you will find a number of styles of text 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: "The PropertyFileSnitch configuration allows an administrator to precisely configure the topology of the network by means of a properties file named cassandra-topology.properties."

A block of code is set as follows:

CREATE KEYSPACE AddressBook
  WITH REPLICATION = { 
    'class' : 'NetworkTopologyStrategy',
    'dc1' : 3,
    'dc2' : 2
  };

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

CREATE KEYSPACE AddressBook
  WITH REPLICATION = { 
    'class' : 'SimpleStrategy',
    'replication_factor' : 3
  };

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

# nodetool status

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: "Then, fill in the host, port, and your credentials in the dialog box and click on the Connect button."