Disk Space Requirements
For each role assigned to a host, you should generally provision 2GB of disk space for log files. This recommendation is based on the default values of configuration properties that set the maximum log file size (200MB) and the maximum number of files (10). To calculate the disk space required for each host, multiply the configured maximum size of the log file by the configured maximum number of logs. Perform this calculation for each role on a host and add them together. (Note that Gateway roles do not generate log files.)
To determine the roles assigned to each host, open the Cloudera Manager Admin Console and go to Roles column.
and expand the list of roles in the