CloudWatch Log Group and Log Stream Naming for CloudTrail
Amazon CloudWatch will display the log group that you created for CloudTrail events alongside any other
log groups you have in a region. We recommend that you use a log group name that helps you
easily distinguish the log group from others. For example,
CloudTrail/logs. Log group names can be between 1 and 512
characters long. Allowed characters include a-z, A-Z, 0-9, '_' (underscore), '-' (hyphen),
'/' (forward slash), and '.' (period).
When CloudTrail creates the log stream for the log group, it names the log stream according to
the following format:
If the volume of CloudTrail logs is large, multiple log streams may be created to deliver log data to your log group.