Exchange DB-Level Backup - Threshold Options:

Remote Backup uses Windows Volume Shadow Copy Service (VSS) to backup Exchange 2003, 2007 and 2010. Snapshots of the Exchange files are taken to ensure the consistency of the backup data. Once the snapshot is complete, Exchange database and log files are checked for integrity. If the integrity check fails, an exception is written to the backup log file.

Remote Backup supports full and differential backups for Exchange Server Database level backup. The first backup is always a full backup (irrespective of the backup type selected, preferred is Incremental), which will backup the database and the log files. When the full backup finishes successfully the transaction log files are flushed.

Successive backups are differential (irrespective of the backup type selected), and back up only the transaction log files. After every differential backup a check is performed to confirm that the Exchange server can be rebuilt using the last differential and the dependent full backup. If this check fails, a full backup is forced.

Differential backups of Exchange grow in size as you do daily backups. You can set either of the following options (registry key option) for Exchange backup to roll-over and do another full:

HKEY_LOCAL_MACHINE\SOFTWARE\Quantum Tech, Inc.\Remote Backup\Plugins\Exchange Server(VSS)

KeyName: DiffMaxCount
KeyType: REG_SZ
KeyValue: Number representing the "Number of differential" backups before forcing a full (Example: 30 - So, after first full backup, the client performs 30 differentials before forcing another full.)

KeyName: DiffPerct
KeyType: REG_SZ
KeyValue: Number representing the percentage size of the differential backups compared to the full that has to be reached or exceeded to force a full backup. (Example: 75 - meaning if the differential reaches 75% of the size of the full, a full backup is performed.)

SQL Backup Threshold Options:

Remote Backup supports differential backup. The first backup will always be a full backup of the data (regardless the backup type selected - preferred is "Incremental") and successive backups will be differential (regardless the backup type selected). After every differential backup a check is performed to confirm that the SQL database can be restored using the last differential and the full backup. If the check fails, a full backup is forced.

Differential backups keep growing in size. You can set either of the two options below to force another full:

HKEY_LOCAL_MACHINE\SOFTWARE\Quantum Tech, Inc.\Remote Backup\Plugins\SQL Server

KeyName: DiffMaxCount
KeyType: REG_SZ
KeyValue: Number representing the "Number of differential" backups before forcing a full (Example: 30 - So, after first full backup, the client performs 30 differentials before forcing another full.)

KeyName: DiffPerct
KeyType: REG_SZ
KeyValue: Number representing the percentage size of the differential backups compared to the full that has to be reached or exceeded to force a full backup. (Example: 75 - meaning if the differential reaches 75% of the size of the full, a full backup is performed.)