When do log files in a CCR cluster get committed to the database?

Hi Wade, Committing transaction log to the database in CCR is similar to normal Exchange Mailbox server and refer bleow article for further detail but it doesn't purge it until you perform full backup. Understanding Transaction Logging http://technet.microsoft.com/en-us/library/bb331951(EXCHG.80).aspx If you are looking to purgecommitted transaction logs, you need to perform full backup and it is suggested to do so minimum once in a week. Database Backup and Restore http://technet.microsoft.com/en-us/library/bb124515.aspx Backing Up Exchange Databases via the Passive Node in an Exchange Server 2007 CCR Cluster http://www.msexchange.org/tutorials/Backing-Up-Exchange-Databases-via-Passive-Node-Exchange-Server-2007-CCR-Cluster.html