Configuring payload replication
Payload replication is the process of creating a copy of the message that is added to a Global Mailbox in a data center to ensure fault tolerance.
Two types of replication, immediate (synchronous) and delayed (asynchronous), are supported in the Global Mailbox system. In immediate replication, the receipt of a message is not acknowledged until the message is replicated in another data center. In an delayed replication, the receipt of a message is acknowledged before replicating the message.
Immediate replication takes a longer time to complete, as the data must be replicated on another data center before responding to the trading partner. This might affect performance to some extent.
Delayed replication does not require the data to be replicated on another data center before responding to a trading partner, resulting in quick response and performance. However, data across all the data centers might be less consistent. For example, there might be outage in a data center, before the delayed replication completes, resulting in inconsistency in data. Occasionally, delayed replication might lead to differences in the list of messages. For a brief time, files not yet replicated are not displayed in the data center the user is currently logged in to. A trading partner user cannot view the acknowledged message on other data centers. You must thoroughly understand the business requirements before configuring the replication type.