IronPort - daily management guide - AsyncOS 7.6.1

Log Subscriptions
5-44
Figure 5-2 Configuring Log Subscriptions Global Settings
Cisco IronPort AsyncOS 7.6 for Email Daily Management Guide
Chapter 5 Logging
Step 2 Specify the system measurement frequency, whether to include Message-ID headers in mail logs,
whether to include the remote response, and whether to include the original subject header of each
message.
Step 3 Enter any other headers you wish to include in the logs.
Step 4 Submit and commit your changes.
Rolling Over Log Subscriptions
To prevent log files on the appliance from becoming too large, AsyncOS performs a “rollover” and
archives a log file when it reaches a user-specified maximum file size or time interval and creates a new
file for incoming log data. Based on the retrieval method defined for the log subscription, the older log
file is stored on the appliance for retrieval or delivered to an external computer. See Log Retrieval
Methods, page 5-6 for more information on how to retrieve log files from the appliance.
When AsyncOS rolls over a log file, it performs the following actions:
Renames the current log file with the timestamp of the rollover and a letter “s” extension signifying
saved.
Creates a new log file and designates the file as current with the “current” extension.
Transfers the newly saved log file to a remote host (if using the push-based retrieval method).
Transfers any previously unsuccessful log files from the same subscription (if using the push-based
retrieval method).
Deletes the oldest file in the log subscription if the total number of files to keep on hand has been
exceeded (if using the poll-based retrieval method).
You define a log subscription’s rollover settings when creating or editing the subscription using the
System Administration > Log Subscriptions page in the GUI or the logconfig command in the CLI. The
two settings available for triggering a log file rollover are:
A maximum file size.
A time interval.
Figure 5-3 shows the rollover settings available for log subscriptions in the GUI.
OL-25138-01