Administration Guide › Set Up Replication › Multiwrite Replication with DISP Recovery (Multiwrite-DISP) › How Recovery Works in Multiwrite-DISP

How Recovery Works in Multiwrite-DISP

When multiwrite replication with DISP recovery is enabled, multiwrite queues are not maintained for offline DSAs; any DSA that goes offline will rely on DISP recovery instead.

To enable multiwrite replication with DISP recovery use the following:

set multi-write-disp-recovery = true;

Note: For the purposes of explanation, we call the DSA that is always available DSA 1, call the DSA that was unavailable and comes online, DSA 2.

When an unavailable DSA comes online, the following occurs:

1. The multiwrite queue on DSA 1 for DSA 2 is enabled.
2. DISP on DSA 1 performs the resynchronization by calculating and sending an update for the period in which DSA 2 was offline. While this is occurring, DSA 1 queues any further updates to DSA 2.
3. When the DISP update completes, the multiwrite queue on DSA 1is replayed to DSA 2.
4. Multiwrite operation resumes.

Note: There are no explicit DISP agreements; all resynchronization and reconciliation is automatic.