Standby Disk Overfill Attack

Attack

The standby server’s drive fills up (possibly because logs weren’t cleaned or an attacker dumped junk files), and it stops accepting the change data streamed from the primary.

With SQL Replication

The primary continues to log new transactions, but because the standby never acknowledges them, its transaction log can’t be cleared. That log swells until the primary’s disk space is exhausted as well, turning a single “full disk” on the backup into a complete outage for the entire system.

With RMF's Object Synchronization

Because the primary and standby servers are no longer joined at the hip by an ever-growing transaction log, a full disk on the backup becomes a localized maintenance issue rather than a cascading system failure.